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| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="dei_CurrentFiscalYearEndDate" xlink:title="dei_CurrentFiscalYearEndDate"/> |
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| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="dei_EntityWellKnownSeasonedIssuer" xlink:title="dei_EntityWellKnownSeasonedIssuer"/> |
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| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCurrentReportingStatus" xlink:label="dei_EntityCurrentReportingStatus" xlink:title="dei_EntityCurrentReportingStatus"/> |
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| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFilerCategory" xlink:label="dei_EntityFilerCategory" xlink:title="dei_EntityFilerCategory"/> |
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| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityEmergingGrowthCompany" xlink:label="dei_EntityEmergingGrowthCompany" xlink:title="dei_EntityEmergingGrowthCompany"/> |
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| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="dei_EntityCommonStockSharesOutstanding" xlink:title="dei_EntityCommonStockSharesOutstanding"/> |
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| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_Security12bTitle" xlink:label="dei_Security12bTitle" xlink:title="dei_Security12bTitle"/> |
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| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_SecurityExchangeName" xlink:label="dei_SecurityExchangeName" xlink:title="dei_SecurityExchangeName"/> |
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| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityInteractiveDataCurrent" xlink:label="dei_EntityInteractiveDataCurrent" xlink:title="dei_EntityInteractiveDataCurrent"/> |
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| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityVoluntaryFilers" xlink:label="dei_EntityVoluntaryFilers" xlink:title="dei_EntityVoluntaryFilers"/> |
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| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressCountry" xlink:label="dei_EntityAddressCountry" xlink:title="dei_EntityAddressCountry"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_StatementOfChangesInEquityLineItems" xlink:label="ifrs-full_StatementOfChangesInEquityLineItems" xlink:title="ifrs-full_StatementOfChangesInEquityLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComprehensiveIncomeFromContinuingOperation" xlink:label="csan_ComprehensiveIncomeFromContinuingOperation" xlink:title="csan_ComprehensiveIncomeFromContinuingOperation"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ContributionsByAndDistributionsToOwnersOfParentAbstract" xlink:label="csan_ContributionsByAndDistributionsToOwnersOfParentAbstract" xlink:title="csan_ContributionsByAndDistributionsToOwnersOfParentAbstract"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ContributionsByAndDistributionsToOwnersOfParent" xlink:label="csan_ContributionsByAndDistributionsToOwnersOfParent" xlink:title="csan_ContributionsByAndDistributionsToOwnersOfParent"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DividendsPaid" xlink:label="ifrs-full_DividendsPaid" xlink:title="ifrs-full_DividendsPaid"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DividendsRecognisedAsDistributionsToNoncontrollingInterests" xlink:label="ifrs-full_DividendsRecognisedAsDistributionsToNoncontrollingInterests" xlink:title="ifrs-full_DividendsRecognisedAsDistributionsToNoncontrollingInterests"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CommonStockDividendsDeclared" xlink:label="csan_CommonStockDividendsDeclared" xlink:title="csan_CommonStockDividendsDeclared"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Equity" xlink:label="ifrs-full_Equity" xlink:title="ifrs-full_Equity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_Equity" xlink:title="Definition : ifrs-full_StatementOfChangesInEquityLineItems to ifrs-full_Equity" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherComprehensiveIncomeAbstract" xlink:label="ifrs-full_OtherComprehensiveIncomeAbstract" xlink:title="ifrs-full_OtherComprehensiveIncomeAbstract"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GainOnShareSubscriptionOfSubsidiary" xlink:label="csan_GainOnShareSubscriptionOfSubsidiary" xlink:title="csan_GainOnShareSubscriptionOfSubsidiary"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:title="ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_StatementOfChangesInEquityTable" xlink:label="ifrs-full_StatementOfChangesInEquityTable" xlink:title="ifrs-full_StatementOfChangesInEquityTable"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ComponentsOfEquityAxis" xlink:label="ifrs-full_ComponentsOfEquityAxis" xlink:title="ifrs-full_ComponentsOfEquityAxis"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EquityMember" xlink:label="ifrs-full_EquityMember" xlink:title="ifrs-full_EquityMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AccumulatedOtherComprehensiveIncomeMember" xlink:label="ifrs-full_AccumulatedOtherComprehensiveIncomeMember" xlink:title="ifrs-full_AccumulatedOtherComprehensiveIncomeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_AccumulatedOtherComprehensiveIncomeMember" xlink:title="Definition : ifrs-full_EquityMember to ifrs-full_AccumulatedOtherComprehensiveIncomeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdditionalPaidinCapitalMember" xlink:label="ifrs-full_AdditionalPaidinCapitalMember" xlink:title="ifrs-full_AdditionalPaidinCapitalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_AdditionalPaidinCapitalMember" xlink:title="Definition : ifrs-full_EquityMember to ifrs-full_AdditionalPaidinCapitalMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:label="ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:title="ifrs-full_EquityAttributableToOwnersOfParentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:title="Definition : ifrs-full_EquityMember to ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IssuedCapitalMember" xlink:label="ifrs-full_IssuedCapitalMember" xlink:title="ifrs-full_IssuedCapitalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_IssuedCapitalMember" xlink:title="Definition : ifrs-full_EquityMember to ifrs-full_IssuedCapitalMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncontrollingInterestsMember" xlink:label="ifrs-full_NoncontrollingInterestsMember" xlink:title="ifrs-full_NoncontrollingInterestsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_NoncontrollingInterestsMember" xlink:title="Definition : ifrs-full_EquityMember to ifrs-full_NoncontrollingInterestsMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RetainedEarningsMember" xlink:label="ifrs-full_RetainedEarningsMember" xlink:title="ifrs-full_RetainedEarningsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_RetainedEarningsMember" xlink:title="Definition : ifrs-full_EquityMember to ifrs-full_RetainedEarningsMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EquityMember" xlink:label="ifrs-full_EquityMember_1" xlink:title="ifrs-full_EquityMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ComponentsOfEquityAxis" xlink:to="ifrs-full_EquityMember_1" xlink:title="Definition : ifrs-full_ComponentsOfEquityAxis to ifrs-full_EquityMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:label="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:title="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_StatementOfChangesInEquityTable" xlink:to="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:title="Definition : ifrs-full_StatementOfChangesInEquityTable to ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RestatedMember" xlink:label="ifrs-full_RestatedMember" xlink:title="ifrs-full_RestatedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:to="ifrs-full_RestatedMember" xlink:title="Definition : ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis to ifrs-full_RestatedMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreaseDecreaseDueToApplicationOfIFRS9Member" xlink:label="csan_IncreaseDecreaseDueToApplicationOfIFRS9Member" xlink:title="csan_IncreaseDecreaseDueToApplicationOfIFRS9Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RestatedMember" xlink:to="csan_IncreaseDecreaseDueToApplicationOfIFRS9Member" xlink:title="Definition : ifrs-full_RestatedMember to csan_IncreaseDecreaseDueToApplicationOfIFRS9Member" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PreviouslyStatedMember" xlink:label="ifrs-full_PreviouslyStatedMember" xlink:title="ifrs-full_PreviouslyStatedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RestatedMember" xlink:to="ifrs-full_PreviouslyStatedMember" xlink:title="Definition : ifrs-full_RestatedMember to ifrs-full_PreviouslyStatedMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreaseDecreaseDueToApplicationOfIFRS16Member" xlink:label="csan_IncreaseDecreaseDueToApplicationOfIFRS16Member" xlink:title="csan_IncreaseDecreaseDueToApplicationOfIFRS16Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RestatedMember" xlink:to="csan_IncreaseDecreaseDueToApplicationOfIFRS16Member" xlink:title="Definition : ifrs-full_RestatedMember to csan_IncreaseDecreaseDueToApplicationOfIFRS16Member" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RestatementMember" xlink:label="csan_RestatementMember" xlink:title="csan_RestatementMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RestatedMember" xlink:to="csan_RestatementMember" xlink:title="Definition : ifrs-full_RestatedMember to csan_RestatementMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RestatedMember" xlink:label="ifrs-full_RestatedMember_1" xlink:title="ifrs-full_RestatedMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TransactionsWithOwnersOfParentAbstract" xlink:label="csan_TransactionsWithOwnersOfParentAbstract" xlink:title="csan_TransactionsWithOwnersOfParentAbstract"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries" xlink:label="ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries" xlink:title="ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_TransactionsWithOwnersOfParentAbstract" xlink:to="ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries" xlink:title="Definition : csan_TransactionsWithOwnersOfParentAbstract to ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" xlink:label="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" xlink:title="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" xlink:title="Definition : ifrs-full_StatementOfChangesInEquityLineItems to ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
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| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ConsolidatedStatementOfCashFlowsParenthetical"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StatementLineItems" xlink:label="csan_StatementLineItems" xlink:title="csan_StatementLineItems"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SubsidiariesMember" xlink:label="ifrs-full_SubsidiariesMember" xlink:title="ifrs-full_SubsidiariesMember"/> |
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| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RezendeBarbosaSaMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RezendeBarbosaSaMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis" xlink:label="ifrs-full_ClassesOfShareCapitalAxis" xlink:title="ifrs-full_ClassesOfShareCapitalAxis"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember" xlink:title="ifrs-full_ClassesOfShareCapitalMember"/> |
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| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="ifrs-full_PreferenceSharesMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalMember to ifrs-full_PreferenceSharesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OrdinarySharesMember" xlink:label="ifrs-full_OrdinarySharesMember" xlink:title="ifrs-full_OrdinarySharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="ifrs-full_OrdinarySharesMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalMember to ifrs-full_OrdinarySharesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember_1" xlink:title="ifrs-full_ClassesOfShareCapitalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember_1" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalAxis to ifrs-full_ClassesOfShareCapitalMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesAxis" xlink:label="ifrs-full_CounterpartiesAxis" xlink:title="ifrs-full_CounterpartiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_StatementTable" xlink:to="ifrs-full_CounterpartiesAxis" xlink:title="Definition : csan_StatementTable to ifrs-full_CounterpartiesAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember" xlink:title="ifrs-full_CounterpartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember" xlink:title="Definition : ifrs-full_CounterpartiesAxis to ifrs-full_CounterpartiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLogsticaMember" xlink:label="csan_CosanLogsticaMember" xlink:title="csan_CosanLogsticaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="csan_CosanLogsticaMember" xlink:title="Definition : ifrs-full_CounterpartiesMember to csan_CosanLogsticaMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAMember" xlink:label="csan_CosanSAMember" xlink:title="csan_CosanSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="csan_CosanSAMember" xlink:title="Definition : ifrs-full_CounterpartiesMember to csan_CosanSAMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember_1" xlink:title="ifrs-full_CounterpartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember_1" xlink:title="Definition : ifrs-full_CounterpartiesAxis to ifrs-full_CounterpartiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:label="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:title="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_StatementTable" xlink:to="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:title="Definition : csan_StatementTable to ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentMember" xlink:label="ifrs-full_PropertyPlantAndEquipmentMember" xlink:title="ifrs-full_PropertyPlantAndEquipmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:to="ifrs-full_PropertyPlantAndEquipmentMember" xlink:title="Definition : ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis to ifrs-full_PropertyPlantAndEquipmentMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ConstructionInProgressMember" xlink:label="ifrs-full_ConstructionInProgressMember" xlink:title="ifrs-full_ConstructionInProgressMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="ifrs-full_ConstructionInProgressMember" xlink:title="Definition : ifrs-full_PropertyPlantAndEquipmentMember to ifrs-full_ConstructionInProgressMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentMember" xlink:label="ifrs-full_PropertyPlantAndEquipmentMember_1" xlink:title="ifrs-full_PropertyPlantAndEquipmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:to="ifrs-full_PropertyPlantAndEquipmentMember_1" xlink:title="Definition : ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis to ifrs-full_PropertyPlantAndEquipmentMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_JointVenturesAxis" xlink:label="ifrs-full_JointVenturesAxis" xlink:title="ifrs-full_JointVenturesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_StatementTable" xlink:to="ifrs-full_JointVenturesAxis" xlink:title="Definition : csan_StatementTable to ifrs-full_JointVenturesAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember" xlink:title="ifrs-full_EntitysTotalForJointVenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember" xlink:title="Definition : ifrs-full_JointVenturesAxis to ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_JointVenturesMember" xlink:label="ifrs-full_JointVenturesMember" xlink:title="ifrs-full_JointVenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForJointVenturesMember" xlink:to="ifrs-full_JointVenturesMember" xlink:title="Definition : ifrs-full_EntitysTotalForJointVenturesMember to ifrs-full_JointVenturesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember_1" xlink:title="ifrs-full_EntitysTotalForJointVenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember_1" xlink:title="Definition : ifrs-full_JointVenturesAxis to ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TypeOfArrangementsAxis" xlink:label="csan_TypeOfArrangementsAxis" xlink:title="csan_TypeOfArrangementsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_StatementTable" xlink:to="csan_TypeOfArrangementsAxis" xlink:title="Definition : csan_StatementTable to csan_TypeOfArrangementsAxis" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TypeOfArrangementsMember" xlink:label="csan_TypeOfArrangementsMember" xlink:title="csan_TypeOfArrangementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_TypeOfArrangementsAxis" xlink:to="csan_TypeOfArrangementsMember" xlink:title="Definition : csan_TypeOfArrangementsAxis to csan_TypeOfArrangementsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NorthSouthRailroadConcessionAgreementMember" xlink:label="csan_NorthSouthRailroadConcessionAgreementMember" xlink:title="csan_NorthSouthRailroadConcessionAgreementMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_TypeOfArrangementsMember" xlink:to="csan_NorthSouthRailroadConcessionAgreementMember" xlink:title="Definition : csan_TypeOfArrangementsMember to csan_NorthSouthRailroadConcessionAgreementMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherLeaseAgreementsMember" xlink:label="csan_OtherLeaseAgreementsMember" xlink:title="csan_OtherLeaseAgreementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_TypeOfArrangementsMember" xlink:to="csan_OtherLeaseAgreementsMember" xlink:title="Definition : csan_TypeOfArrangementsMember to csan_OtherLeaseAgreementsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TypeOfArrangementsMember" xlink:label="csan_TypeOfArrangementsMember_1" xlink:title="csan_TypeOfArrangementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_TypeOfArrangementsAxis" xlink:to="csan_TypeOfArrangementsMember_1" xlink:title="Definition : csan_TypeOfArrangementsAxis to csan_TypeOfArrangementsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TaxAssetsRecognitionRelatedToExclusionOfTaxOnSalesAndServices" xlink:label="csan_TaxAssetsRecognitionRelatedToExclusionOfTaxOnSalesAndServices" xlink:title="csan_TaxAssetsRecognitionRelatedToExclusionOfTaxOnSalesAndServices"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_StatementLineItems" xlink:to="csan_TaxAssetsRecognitionRelatedToExclusionOfTaxOnSalesAndServices" xlink:title="Definition : csan_StatementLineItems to csan_TaxAssetsRecognitionRelatedToExclusionOfTaxOnSalesAndServices" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IntangibleAssetsAdditions" xlink:label="csan_IntangibleAssetsAdditions" xlink:title="csan_IntangibleAssetsAdditions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_StatementLineItems" xlink:to="csan_IntangibleAssetsAdditions" xlink:title="Definition : csan_StatementLineItems to csan_IntangibleAssetsAdditions" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdditionsToRightofuseAssets" xlink:label="ifrs-full_AdditionsToRightofuseAssets" xlink:title="ifrs-full_AdditionsToRightofuseAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_StatementLineItems" xlink:to="ifrs-full_AdditionsToRightofuseAssets" xlink:title="Definition : csan_StatementLineItems to ifrs-full_AdditionsToRightofuseAssets" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CapitalContributionCapitalizationOfExpenses" xlink:label="csan_CapitalContributionCapitalizationOfExpenses" xlink:title="csan_CapitalContributionCapitalizationOfExpenses"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_StatementLineItems" xlink:to="csan_CapitalContributionCapitalizationOfExpenses" xlink:title="Definition : csan_StatementLineItems to csan_CapitalContributionCapitalizationOfExpenses" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NonCashSettlementOfReceivables" xlink:label="csan_NonCashSettlementOfReceivables" xlink:title="csan_NonCashSettlementOfReceivables"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_StatementLineItems" xlink:to="csan_NonCashSettlementOfReceivables" xlink:title="Definition : csan_StatementLineItems to csan_NonCashSettlementOfReceivables" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InvestmentAccountedForUsingEquityMethod" xlink:label="ifrs-full_InvestmentAccountedForUsingEquityMethod" xlink:title="ifrs-full_InvestmentAccountedForUsingEquityMethod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_StatementLineItems" xlink:to="ifrs-full_InvestmentAccountedForUsingEquityMethod" xlink:title="Definition : csan_StatementLineItems to ifrs-full_InvestmentAccountedForUsingEquityMethod" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseInContingentConsiderationAssetLiability" xlink:label="ifrs-full_IncreaseDecreaseInContingentConsiderationAssetLiability" xlink:title="ifrs-full_IncreaseDecreaseInContingentConsiderationAssetLiability"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_StatementLineItems" xlink:to="ifrs-full_IncreaseDecreaseInContingentConsiderationAssetLiability" xlink:title="Definition : csan_StatementLineItems to ifrs-full_IncreaseDecreaseInContingentConsiderationAssetLiability" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PaymentForAcquisitionOfAssetsInInstallments" xlink:label="csan_PaymentForAcquisitionOfAssetsInInstallments" xlink:title="csan_PaymentForAcquisitionOfAssetsInInstallments"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_StatementLineItems" xlink:to="csan_PaymentForAcquisitionOfAssetsInInstallments" xlink:title="Definition : csan_StatementLineItems to csan_PaymentForAcquisitionOfAssetsInInstallments" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AmountOfVotingEquityInterestsAcquired" xlink:label="csan_AmountOfVotingEquityInterestsAcquired" xlink:title="csan_AmountOfVotingEquityInterestsAcquired"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_StatementLineItems" xlink:to="csan_AmountOfVotingEquityInterestsAcquired" xlink:title="Definition : csan_StatementLineItems to csan_AmountOfVotingEquityInterestsAcquired" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfInstrumentsOrInterestsIssuedOrIssuable" xlink:label="ifrs-full_NumberOfInstrumentsOrInterestsIssuedOrIssuable" xlink:title="ifrs-full_NumberOfInstrumentsOrInterestsIssuedOrIssuable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_StatementLineItems" xlink:to="ifrs-full_NumberOfInstrumentsOrInterestsIssuedOrIssuable" xlink:title="Definition : csan_StatementLineItems to ifrs-full_NumberOfInstrumentsOrInterestsIssuedOrIssuable" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AccountsPayable" xlink:label="csan_AccountsPayable" xlink:title="csan_AccountsPayable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_StatementLineItems" xlink:to="csan_AccountsPayable" xlink:title="Definition : csan_StatementLineItems to csan_AccountsPayable" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ShareBasedPaymentTables"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StatementLineItems" xlink:label="csan_StatementLineItems" xlink:title="csan_StatementLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfIndirectMeasurementOfFairValueOfGoodsOrServicesReceivedShareOptionsGrantedDuringPeriodExplanatory" xlink:label="ifrs-full_DisclosureOfIndirectMeasurementOfFairValueOfGoodsOrServicesReceivedShareOptionsGrantedDuringPeriodExplanatory" xlink:title="ifrs-full_DisclosureOfIndirectMeasurementOfFairValueOfGoodsOrServicesReceivedShareOptionsGrantedDuringPeriodExplanatory"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_StatementLineItems" xlink:to="ifrs-full_DisclosureOfIndirectMeasurementOfFairValueOfGoodsOrServicesReceivedShareOptionsGrantedDuringPeriodExplanatory" xlink:title="Definition : csan_StatementLineItems to ifrs-full_DisclosureOfIndirectMeasurementOfFairValueOfGoodsOrServicesReceivedShareOptionsGrantedDuringPeriodExplanatory" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory" xlink:label="ifrs-full_DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory" xlink:title="ifrs-full_DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_StatementLineItems" xlink:to="ifrs-full_DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory" xlink:title="Definition : csan_StatementLineItems to ifrs-full_DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsExplanatory" xlink:label="ifrs-full_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsExplanatory" xlink:title="ifrs-full_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsExplanatory"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_StatementLineItems" xlink:to="ifrs-full_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsExplanatory" xlink:title="Definition : csan_StatementLineItems to ifrs-full_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsExplanatory" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ExplanationOfEffectOfSharebasedPaymentsOnProfitOrLoss" xlink:label="ifrs-full_ExplanationOfEffectOfSharebasedPaymentsOnProfitOrLoss" xlink:title="ifrs-full_ExplanationOfEffectOfSharebasedPaymentsOnProfitOrLoss"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_StatementLineItems" xlink:to="ifrs-full_ExplanationOfEffectOfSharebasedPaymentsOnProfitOrLoss" xlink:title="Definition : csan_StatementLineItems to ifrs-full_ExplanationOfEffectOfSharebasedPaymentsOnProfitOrLoss" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StatementTable" xlink:label="csan_StatementTable" xlink:title="csan_StatementTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_StatementLineItems" xlink:to="csan_StatementTable" xlink:title="Definition : csan_StatementLineItems to csan_StatementTable" xlink:type="arc" use="optional" order="4" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_StatementTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : csan_StatementTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAIndustriaeComercioMember" xlink:label="csan_CosanSAIndustriaeComercioMember" xlink:title="csan_CosanSAIndustriaeComercioMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanSAIndustriaeComercioMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanSAIndustriaeComercioMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:title="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_StatementTable" xlink:to="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:title="Definition : csan_StatementTable to ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SharebasedPaymentArrangementsMember" xlink:label="ifrs-full_SharebasedPaymentArrangementsMember" xlink:title="ifrs-full_SharebasedPaymentArrangementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_SharebasedPaymentArrangementsMember" xlink:title="Definition : ifrs-full_TypesOfSharebasedPaymentArrangementsAxis to ifrs-full_SharebasedPaymentArrangementsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EquitysettledPlansMember" xlink:label="csan_EquitysettledPlansMember" xlink:title="csan_EquitysettledPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SharebasedPaymentArrangementsMember" xlink:to="csan_EquitysettledPlansMember" xlink:title="Definition : ifrs-full_SharebasedPaymentArrangementsMember to csan_EquitysettledPlansMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SharebasedPaymentArrangementsMember" xlink:label="ifrs-full_SharebasedPaymentArrangementsMember_1" xlink:title="ifrs-full_SharebasedPaymentArrangementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_SharebasedPaymentArrangementsMember_1" xlink:title="Definition : ifrs-full_TypesOfSharebasedPaymentArrangementsAxis to ifrs-full_SharebasedPaymentArrangementsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfStockOptionActivityTextBlock" xlink:label="csan_DisclosureOfStockOptionActivityTextBlock" xlink:title="csan_DisclosureOfStockOptionActivityTextBlock"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_StatementLineItems" xlink:to="csan_DisclosureOfStockOptionActivityTextBlock" xlink:title="Definition : csan_StatementLineItems to csan_DisclosureOfStockOptionActivityTextBlock" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/OperationsAdditionalInformationDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:label="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:title="csan_DisclosureOfBackgroundAndOperationsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:label="ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:title="ifrs-full_ProportionOfOwnershipInterestInSubsidiary"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ExchangeRightsExercisedDuringPeriodShares" xlink:label="csan_ExchangeRightsExercisedDuringPeriodShares" xlink:title="csan_ExchangeRightsExercisedDuringPeriodShares"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_ExchangeRightsExercisedDuringPeriodShares" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_ExchangeRightsExercisedDuringPeriodShares" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PaymentsForReplacementStockOptionsAwards" xlink:label="csan_PaymentsForReplacementStockOptionsAwards" xlink:title="csan_PaymentsForReplacementStockOptionsAwards"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_PaymentsForReplacementStockOptionsAwards" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_PaymentsForReplacementStockOptionsAwards" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FairValueOfShareReceived" xlink:label="csan_FairValueOfShareReceived" xlink:title="csan_FairValueOfShareReceived"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_FairValueOfShareReceived" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_FairValueOfShareReceived" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfShareHolderinPutOption" xlink:label="csan_PercentageOfShareHolderinPutOption" xlink:title="csan_PercentageOfShareHolderinPutOption"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_PercentageOfShareHolderinPutOption" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_PercentageOfShareHolderinPutOption" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfSaleInStockSubsidiary" xlink:label="csan_NumberOfSaleInStockSubsidiary" xlink:title="csan_NumberOfSaleInStockSubsidiary"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_NumberOfSaleInStockSubsidiary" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_NumberOfSaleInStockSubsidiary" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SalesPercentageOfStockInSubsidiary" xlink:label="csan_SalesPercentageOfStockInSubsidiary" xlink:title="csan_SalesPercentageOfStockInSubsidiary"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_SalesPercentageOfStockInSubsidiary" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_SalesPercentageOfStockInSubsidiary" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred" xlink:label="ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred" xlink:title="ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill" xlink:label="ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill" xlink:title="ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PortionOfConsiderationPaidReceivedConsistingOfCashAndCashEquivalents" xlink:label="ifrs-full_PortionOfConsiderationPaidReceivedConsistingOfCashAndCashEquivalents" xlink:title="ifrs-full_PortionOfConsiderationPaidReceivedConsistingOfCashAndCashEquivalents"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="ifrs-full_PortionOfConsiderationPaidReceivedConsistingOfCashAndCashEquivalents" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to ifrs-full_PortionOfConsiderationPaidReceivedConsistingOfCashAndCashEquivalents" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseInContingentConsiderationAssetLiability" xlink:label="ifrs-full_IncreaseDecreaseInContingentConsiderationAssetLiability" xlink:title="ifrs-full_IncreaseDecreaseInContingentConsiderationAssetLiability"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="ifrs-full_IncreaseDecreaseInContingentConsiderationAssetLiability" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to ifrs-full_IncreaseDecreaseInContingentConsiderationAssetLiability" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CashContributions" xlink:label="csan_CashContributions" xlink:title="csan_CashContributions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_CashContributions" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_CashContributions" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfIssuanceOfNewCommonShares" xlink:label="csan_PercentageOfIssuanceOfNewCommonShares" xlink:title="csan_PercentageOfIssuanceOfNewCommonShares"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_PercentageOfIssuanceOfNewCommonShares" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_PercentageOfIssuanceOfNewCommonShares" xlink:type="arc" use="optional" order="12" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CapitalContribution" xlink:label="csan_CapitalContribution" xlink:title="csan_CapitalContribution"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_CapitalContribution" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_CapitalContribution" xlink:type="arc" use="optional" order="13" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ResolutionAmountApproved" xlink:label="csan_ResolutionAmountApproved" xlink:title="csan_ResolutionAmountApproved"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_ResolutionAmountApproved" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_ResolutionAmountApproved" xlink:type="arc" use="optional" order="14" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_InvestmentInJointVenture" xlink:label="csan_InvestmentInJointVenture" xlink:title="csan_InvestmentInJointVenture"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_InvestmentInJointVenture" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_InvestmentInJointVenture" xlink:type="arc" use="optional" order="15" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GainLossFromFormationOfJointVenture" xlink:label="csan_GainLossFromFormationOfJointVenture" xlink:title="csan_GainLossFromFormationOfJointVenture"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_GainLossFromFormationOfJointVenture" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_GainLossFromFormationOfJointVenture" xlink:type="arc" use="optional" order="16" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ChangesInEquity" xlink:label="ifrs-full_ChangesInEquity" xlink:title="ifrs-full_ChangesInEquity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="ifrs-full_ChangesInEquity" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to ifrs-full_ChangesInEquity" xlink:type="arc" use="optional" order="17" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ContractualTerm" xlink:label="csan_ContractualTerm" xlink:title="csan_ContractualTerm"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_ContractualTerm" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_ContractualTerm" xlink:type="arc" use="optional" order="18" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BidAmountAdjustedWithContratualParameters" xlink:label="csan_BidAmountAdjustedWithContratualParameters" xlink:title="csan_BidAmountAdjustedWithContratualParameters"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_BidAmountAdjustedWithContratualParameters" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_BidAmountAdjustedWithContratualParameters" xlink:type="arc" use="optional" order="19" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BidAmount" xlink:label="csan_BidAmount" xlink:title="csan_BidAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_BidAmount" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_BidAmount" xlink:type="arc" use="optional" order="20" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:label="ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:title="ifrs-full_ProportionOfOwnershipInterestInJointVenture"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:type="arc" use="optional" order="21" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PaymentsForAuction" xlink:label="csan_PaymentsForAuction" xlink:title="csan_PaymentsForAuction"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_PaymentsForAuction" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_PaymentsForAuction" xlink:type="arc" use="optional" order="22" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfCashPaymentInAuction" xlink:label="csan_PercentageOfCashPaymentInAuction" xlink:title="csan_PercentageOfCashPaymentInAuction"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_PercentageOfCashPaymentInAuction" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_PercentageOfCashPaymentInAuction" xlink:type="arc" use="optional" order="23" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfPurchaseOptions" xlink:label="csan_NumberOfPurchaseOptions" xlink:title="csan_NumberOfPurchaseOptions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_NumberOfPurchaseOptions" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_NumberOfPurchaseOptions" xlink:type="arc" use="optional" order="24" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ProceedsFromSaleOfEquitySharesHeldByControlledTrust" xlink:label="csan_ProceedsFromSaleOfEquitySharesHeldByControlledTrust" xlink:title="csan_ProceedsFromSaleOfEquitySharesHeldByControlledTrust"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_ProceedsFromSaleOfEquitySharesHeldByControlledTrust" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_ProceedsFromSaleOfEquitySharesHeldByControlledTrust" xlink:type="arc" use="optional" order="25" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfBackgroundAndOperationsTable" xlink:label="csan_DisclosureOfBackgroundAndOperationsTable" xlink:title="csan_DisclosureOfBackgroundAndOperationsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfBackgroundAndOperationsLineItems" xlink:to="csan_DisclosureOfBackgroundAndOperationsTable" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsLineItems to csan_DisclosureOfBackgroundAndOperationsTable" xlink:type="arc" use="optional" order="26" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:title="dei_LegalEntityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="dei_LegalEntityAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to dei_LegalEntityAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAMember" xlink:label="csan_CosanSAMember" xlink:title="csan_CosanSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_CosanSAMember" xlink:title="Definition : dei_EntityDomain to csan_CosanSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLogisticaSAMember" xlink:label="csan_CosanLogisticaSAMember" xlink:title="csan_CosanLogisticaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_CosanLogisticaSAMember" xlink:title="Definition : dei_EntityDomain to csan_CosanLogisticaSAMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain_1" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain_1" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ComponentsOfEquityAxis" xlink:label="ifrs-full_ComponentsOfEquityAxis" xlink:title="ifrs-full_ComponentsOfEquityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="ifrs-full_ComponentsOfEquityAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to ifrs-full_ComponentsOfEquityAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EquityMember" xlink:label="ifrs-full_EquityMember" xlink:title="ifrs-full_EquityMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ComponentsOfEquityAxis" xlink:to="ifrs-full_EquityMember" xlink:title="Definition : ifrs-full_ComponentsOfEquityAxis to ifrs-full_EquityMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CapitalReserveMember" xlink:label="ifrs-full_CapitalReserveMember" xlink:title="ifrs-full_CapitalReserveMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_CapitalReserveMember" xlink:title="Definition : ifrs-full_EquityMember to ifrs-full_CapitalReserveMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EquityMember" xlink:label="ifrs-full_EquityMember_1" xlink:title="ifrs-full_EquityMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ComponentsOfEquityAxis" xlink:to="ifrs-full_EquityMember_1" xlink:title="Definition : ifrs-full_ComponentsOfEquityAxis to ifrs-full_EquityMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ResolutionTypeAxis" xlink:label="csan_ResolutionTypeAxis" xlink:title="csan_ResolutionTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="csan_ResolutionTypeAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to csan_ResolutionTypeAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ResolutiontypeDomain" xlink:label="csan_ResolutiontypeDomain" xlink:title="csan_ResolutiontypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_ResolutionTypeAxis" xlink:to="csan_ResolutiontypeDomain" xlink:title="Definition : csan_ResolutionTypeAxis to csan_ResolutiontypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_Arsesp933ResolutionMember" xlink:label="csan_Arsesp933ResolutionMember" xlink:title="csan_Arsesp933ResolutionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_ResolutiontypeDomain" xlink:to="csan_Arsesp933ResolutionMember" xlink:title="Definition : csan_ResolutiontypeDomain to csan_Arsesp933ResolutionMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ResolutiontypeDomain" xlink:label="csan_ResolutiontypeDomain_1" xlink:title="csan_ResolutiontypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_ResolutionTypeAxis" xlink:to="csan_ResolutiontypeDomain_1" xlink:title="Definition : csan_ResolutionTypeAxis to csan_ResolutiontypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_JointVenturesAxis" xlink:label="ifrs-full_JointVenturesAxis" xlink:title="ifrs-full_JointVenturesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="ifrs-full_JointVenturesAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to ifrs-full_JointVenturesAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember" xlink:title="ifrs-full_EntitysTotalForJointVenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember" xlink:title="Definition : ifrs-full_JointVenturesAxis to ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RedeIntegradaDeLojasDeConvennciasEProximidadeSAMember" xlink:label="csan_RedeIntegradaDeLojasDeConvennciasEProximidadeSAMember" xlink:title="csan_RedeIntegradaDeLojasDeConvennciasEProximidadeSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForJointVenturesMember" xlink:to="csan_RedeIntegradaDeLojasDeConvennciasEProximidadeSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForJointVenturesMember to csan_RedeIntegradaDeLojasDeConvennciasEProximidadeSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember_1" xlink:title="ifrs-full_EntitysTotalForJointVenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember_1" xlink:title="Definition : ifrs-full_JointVenturesAxis to ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ChangesInEquityAxis" xlink:label="csan_ChangesInEquityAxis" xlink:title="csan_ChangesInEquityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="csan_ChangesInEquityAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to csan_ChangesInEquityAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ChangesInEquityDomain" xlink:label="csan_ChangesInEquityDomain" xlink:title="csan_ChangesInEquityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_ChangesInEquityAxis" xlink:to="csan_ChangesInEquityDomain" xlink:title="Definition : csan_ChangesInEquityAxis to csan_ChangesInEquityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BeforeReductionOfEquityMember" xlink:label="csan_BeforeReductionOfEquityMember" xlink:title="csan_BeforeReductionOfEquityMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_ChangesInEquityDomain" xlink:to="csan_BeforeReductionOfEquityMember" xlink:title="Definition : csan_ChangesInEquityDomain to csan_BeforeReductionOfEquityMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AfterReductionOfEquityMember" xlink:label="csan_AfterReductionOfEquityMember" xlink:title="csan_AfterReductionOfEquityMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_ChangesInEquityDomain" xlink:to="csan_AfterReductionOfEquityMember" xlink:title="Definition : csan_ChangesInEquityDomain to csan_AfterReductionOfEquityMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ChangesInEquityDomain" xlink:label="csan_ChangesInEquityDomain_1" xlink:title="csan_ChangesInEquityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_ChangesInEquityAxis" xlink:to="csan_ChangesInEquityDomain_1" xlink:title="Definition : csan_ChangesInEquityAxis to csan_ChangesInEquityDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementScenarioAxis" xlink:label="srt_StatementScenarioAxis" xlink:title="srt_StatementScenarioAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="srt_StatementScenarioAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to srt_StatementScenarioAxis" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain" xlink:title="srt_ScenarioUnspecifiedDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain" xlink:title="Definition : srt_StatementScenarioAxis to srt_ScenarioUnspecifiedDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScenarioForecastMember" xlink:label="srt_ScenarioForecastMember" xlink:title="srt_ScenarioForecastMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="srt_ScenarioForecastMember" xlink:title="Definition : srt_ScenarioUnspecifiedDomain to srt_ScenarioForecastMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain_1" xlink:title="srt_ScenarioUnspecifiedDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain_1" xlink:title="Definition : srt_StatementScenarioAxis to srt_ScenarioUnspecifiedDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsAxis" xlink:label="ifrs-full_ClassesOfAssetsAxis" xlink:title="ifrs-full_ClassesOfAssetsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="ifrs-full_ClassesOfAssetsAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to ifrs-full_ClassesOfAssetsAxis" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember" xlink:title="ifrs-full_ClassesOfAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsAxis to ifrs-full_ClassesOfAssetsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RailroadNetworkMember" xlink:label="csan_RailroadNetworkMember" xlink:title="csan_RailroadNetworkMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="csan_RailroadNetworkMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsMember to csan_RailroadNetworkMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember_1" xlink:title="ifrs-full_ClassesOfAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember_1" xlink:title="Definition : ifrs-full_ClassesOfAssetsAxis to ifrs-full_ClassesOfAssetsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialriskmanagementScheduleofoutstandingenergytradingoperationsDetails"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:label="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:title="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GainLossOnChangeInFairValueOfHedgingInstrumentUsedAsBasisForRecognisingHedgeIneffectiveness" xlink:label="ifrs-full_GainLossOnChangeInFairValueOfHedgingInstrumentUsedAsBasisForRecognisingHedgeIneffectiveness" xlink:title="ifrs-full_GainLossOnChangeInFairValueOfHedgingInstrumentUsedAsBasisForRecognisingHedgeIneffectiveness"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:to="ifrs-full_GainLossOnChangeInFairValueOfHedgingInstrumentUsedAsBasisForRecognisingHedgeIneffectiveness" xlink:title="Definition : ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems to ifrs-full_GainLossOnChangeInFairValueOfHedgingInstrumentUsedAsBasisForRecognisingHedgeIneffectiveness" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable" xlink:title="ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:to="ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable" xlink:title="Definition : ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems to ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksAxis" xlink:label="ifrs-full_TypesOfRisksAxis" xlink:title="ifrs-full_TypesOfRisksAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable" xlink:to="ifrs-full_TypesOfRisksAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable to ifrs-full_TypesOfRisksAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksMember" xlink:label="ifrs-full_TypesOfRisksMember" xlink:title="ifrs-full_TypesOfRisksMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksMember" xlink:title="Definition : ifrs-full_TypesOfRisksAxis to ifrs-full_TypesOfRisksMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CommodityPriceRiskMember" xlink:label="ifrs-full_CommodityPriceRiskMember" xlink:title="ifrs-full_CommodityPriceRiskMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ifrs-full_CommodityPriceRiskMember" xlink:title="Definition : ifrs-full_TypesOfRisksMember to ifrs-full_CommodityPriceRiskMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksMember" xlink:label="ifrs-full_TypesOfRisksMember_1" xlink:title="ifrs-full_TypesOfRisksMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksMember_1" xlink:title="Definition : ifrs-full_TypesOfRisksAxis to ifrs-full_TypesOfRisksMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesAxis" xlink:label="ifrs-full_ProductsAndServicesAxis" xlink:title="ifrs-full_ProductsAndServicesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable" xlink:to="ifrs-full_ProductsAndServicesAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable to ifrs-full_ProductsAndServicesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesMember" xlink:label="ifrs-full_ProductsAndServicesMember" xlink:title="ifrs-full_ProductsAndServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ProductsAndServicesAxis" xlink:to="ifrs-full_ProductsAndServicesMember" xlink:title="Definition : ifrs-full_ProductsAndServicesAxis to ifrs-full_ProductsAndServicesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ElectricityDistributionMember" xlink:label="ifrs-full_ElectricityDistributionMember" xlink:title="ifrs-full_ElectricityDistributionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="ifrs-full_ElectricityDistributionMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to ifrs-full_ElectricityDistributionMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesMember" xlink:label="ifrs-full_ProductsAndServicesMember_1" xlink:title="ifrs-full_ProductsAndServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ProductsAndServicesAxis" xlink:to="ifrs-full_ProductsAndServicesMember_1" xlink:title="Definition : ifrs-full_ProductsAndServicesAxis to ifrs-full_ProductsAndServicesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RiskExposuresAxis" xlink:label="ifrs-full_RiskExposuresAxis" xlink:title="ifrs-full_RiskExposuresAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable" xlink:to="ifrs-full_RiskExposuresAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable to ifrs-full_RiskExposuresAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RiskExposuresMember" xlink:label="ifrs-full_RiskExposuresMember" xlink:title="ifrs-full_RiskExposuresMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RiskExposuresAxis" xlink:to="ifrs-full_RiskExposuresMember" xlink:title="Definition : ifrs-full_RiskExposuresAxis to ifrs-full_RiskExposuresMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_VariationAnalysisProbableMember" xlink:label="csan_VariationAnalysisProbableMember" xlink:title="csan_VariationAnalysisProbableMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RiskExposuresMember" xlink:to="csan_VariationAnalysisProbableMember" xlink:title="Definition : ifrs-full_RiskExposuresMember to csan_VariationAnalysisProbableMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_VariationAnalysis25PercentageIncreaseMember" xlink:label="csan_VariationAnalysis25PercentageIncreaseMember" xlink:title="csan_VariationAnalysis25PercentageIncreaseMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RiskExposuresMember" xlink:to="csan_VariationAnalysis25PercentageIncreaseMember" xlink:title="Definition : ifrs-full_RiskExposuresMember to csan_VariationAnalysis25PercentageIncreaseMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_VariationAnalysis50PercentageIncreaseMember" xlink:label="csan_VariationAnalysis50PercentageIncreaseMember" xlink:title="csan_VariationAnalysis50PercentageIncreaseMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RiskExposuresMember" xlink:to="csan_VariationAnalysis50PercentageIncreaseMember" xlink:title="Definition : ifrs-full_RiskExposuresMember to csan_VariationAnalysis50PercentageIncreaseMember" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_VariationAnalysis25PercentageDecreaseMember" xlink:label="csan_VariationAnalysis25PercentageDecreaseMember" xlink:title="csan_VariationAnalysis25PercentageDecreaseMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RiskExposuresMember" xlink:to="csan_VariationAnalysis25PercentageDecreaseMember" xlink:title="Definition : ifrs-full_RiskExposuresMember to csan_VariationAnalysis25PercentageDecreaseMember" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_VariationAnalysis50PercentageDecreaseMember" xlink:label="csan_VariationAnalysis50PercentageDecreaseMember" xlink:title="csan_VariationAnalysis50PercentageDecreaseMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RiskExposuresMember" xlink:to="csan_VariationAnalysis50PercentageDecreaseMember" xlink:title="Definition : ifrs-full_RiskExposuresMember to csan_VariationAnalysis50PercentageDecreaseMember" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RiskExposuresMember" xlink:label="ifrs-full_RiskExposuresMember_1" xlink:title="ifrs-full_RiskExposuresMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RiskExposuresAxis" xlink:to="ifrs-full_RiskExposuresMember_1" xlink:title="Definition : ifrs-full_RiskExposuresAxis to ifrs-full_RiskExposuresMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialassetsandliabilitiesSummaryofCreditRiskDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfCreditRiskExposureLineItems" xlink:label="ifrs-full_DisclosureOfCreditRiskExposureLineItems" xlink:title="ifrs-full_DisclosureOfCreditRiskExposureLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CreditExposure" xlink:label="ifrs-full_CreditExposure" xlink:title="ifrs-full_CreditExposure"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfCreditRiskExposureLineItems" xlink:to="ifrs-full_CreditExposure" xlink:title="Definition : ifrs-full_DisclosureOfCreditRiskExposureLineItems to ifrs-full_CreditExposure" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfCreditRiskExposureTable" xlink:label="ifrs-full_DisclosureOfCreditRiskExposureTable" xlink:title="ifrs-full_DisclosureOfCreditRiskExposureTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfCreditRiskExposureLineItems" xlink:to="ifrs-full_DisclosureOfCreditRiskExposureTable" xlink:title="Definition : ifrs-full_DisclosureOfCreditRiskExposureLineItems to ifrs-full_DisclosureOfCreditRiskExposureTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfCreditRiskExposureTable" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:title="Definition : ifrs-full_DisclosureOfCreditRiskExposureTable to ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsAxis to ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CashAndCashEquivalentMember" xlink:label="csan_CashAndCashEquivalentMember" xlink:title="csan_CashAndCashEquivalentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_CashAndCashEquivalentMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_CashAndCashEquivalentMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DerivativeFinancialInstrumentsMember" xlink:label="csan_DerivativeFinancialInstrumentsMember" xlink:title="csan_DerivativeFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_DerivativeFinancialInstrumentsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_DerivativeFinancialInstrumentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DividendsMember" xlink:label="csan_DividendsMember" xlink:title="csan_DividendsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_DividendsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_DividendsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MarketableSecuritiesMember" xlink:label="csan_MarketableSecuritiesMember" xlink:title="csan_MarketableSecuritiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_MarketableSecuritiesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_MarketableSecuritiesMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ReceivablesFromRelatedPartiesMember" xlink:label="csan_ReceivablesFromRelatedPartiesMember" xlink:title="csan_ReceivablesFromRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_ReceivablesFromRelatedPartiesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_ReceivablesFromRelatedPartiesMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RestrictedCashMember" xlink:label="csan_RestrictedCashMember" xlink:title="csan_RestrictedCashMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_RestrictedCashMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_RestrictedCashMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TradeReceivablesMember" xlink:label="ifrs-full_TradeReceivablesMember" xlink:title="ifrs-full_TradeReceivablesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="ifrs-full_TradeReceivablesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to ifrs-full_TradeReceivablesMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember_1" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember_1" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsAxis to ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksAxis" xlink:label="ifrs-full_TypesOfRisksAxis" xlink:title="ifrs-full_TypesOfRisksAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfCreditRiskExposureTable" xlink:to="ifrs-full_TypesOfRisksAxis" xlink:title="Definition : ifrs-full_DisclosureOfCreditRiskExposureTable to ifrs-full_TypesOfRisksAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksMember" xlink:label="ifrs-full_TypesOfRisksMember" xlink:title="ifrs-full_TypesOfRisksMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksMember" xlink:title="Definition : ifrs-full_TypesOfRisksAxis to ifrs-full_TypesOfRisksMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CreditRiskMember" xlink:label="ifrs-full_CreditRiskMember" xlink:title="ifrs-full_CreditRiskMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ifrs-full_CreditRiskMember" xlink:title="Definition : ifrs-full_TypesOfRisksMember to ifrs-full_CreditRiskMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksMember" xlink:label="ifrs-full_TypesOfRisksMember_1" xlink:title="ifrs-full_TypesOfRisksMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksMember_1" xlink:title="Definition : ifrs-full_TypesOfRisksAxis to ifrs-full_TypesOfRisksMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ConcentrationOfCreditInConsumersGreaterThan10PercentOfSales" xlink:label="csan_ConcentrationOfCreditInConsumersGreaterThan10PercentOfSales" xlink:title="csan_ConcentrationOfCreditInConsumersGreaterThan10PercentOfSales"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfCreditRiskExposureLineItems" xlink:to="csan_ConcentrationOfCreditInConsumersGreaterThan10PercentOfSales" xlink:title="Definition : ifrs-full_DisclosureOfCreditRiskExposureLineItems to csan_ConcentrationOfCreditInConsumersGreaterThan10PercentOfSales" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/AccountingPoliciesScheduleOfExchangeRatesOfRealForFunctionalCurrenciesOfSubsidiariesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfForeignExchangeRatesLineItems" xlink:label="csan_DisclosureOfForeignExchangeRatesLineItems" xlink:title="csan_DisclosureOfForeignExchangeRatesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfForeignExchangeRatesTable" xlink:label="csan_DisclosureOfForeignExchangeRatesTable" xlink:title="csan_DisclosureOfForeignExchangeRatesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfForeignExchangeRatesLineItems" xlink:to="csan_DisclosureOfForeignExchangeRatesTable" xlink:title="Definition : csan_DisclosureOfForeignExchangeRatesLineItems to csan_DisclosureOfForeignExchangeRatesTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CurrencyAxis" xlink:label="srt_CurrencyAxis" xlink:title="srt_CurrencyAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfForeignExchangeRatesTable" xlink:to="srt_CurrencyAxis" xlink:title="Definition : csan_DisclosureOfForeignExchangeRatesTable to srt_CurrencyAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/currency/2019/currency-2019-01-31.xsd#currency_AllCurrenciesDomain" xlink:label="currency_AllCurrenciesDomain" xlink:title="currency_AllCurrenciesDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_CurrencyAxis" xlink:to="currency_AllCurrenciesDomain" xlink:title="Definition : srt_CurrencyAxis to currency_AllCurrenciesDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/currency/2019/currency-2019-01-31.xsd#currency_EUR" xlink:label="currency_EUR" xlink:title="currency_EUR"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="currency_AllCurrenciesDomain" xlink:to="currency_EUR" xlink:title="Definition : currency_AllCurrenciesDomain to currency_EUR" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/currency/2019/currency-2019-01-31.xsd#currency_GBP" xlink:label="currency_GBP" xlink:title="currency_GBP"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="currency_AllCurrenciesDomain" xlink:to="currency_GBP" xlink:title="Definition : currency_AllCurrenciesDomain to currency_GBP" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/currency/2019/currency-2019-01-31.xsd#currency_USD" xlink:label="currency_USD" xlink:title="currency_USD"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="currency_AllCurrenciesDomain" xlink:to="currency_USD" xlink:title="Definition : currency_AllCurrenciesDomain to currency_USD" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/currency/2019/currency-2019-01-31.xsd#currency_AllCurrenciesDomain" xlink:label="currency_AllCurrenciesDomain_1" xlink:title="currency_AllCurrenciesDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_CurrencyAxis" xlink:to="currency_AllCurrenciesDomain_1" xlink:title="Definition : srt_CurrencyAxis to currency_AllCurrenciesDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ForeignCurrencyExchangeRate" xlink:label="csan_ForeignCurrencyExchangeRate" xlink:title="csan_ForeignCurrencyExchangeRate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfForeignExchangeRatesLineItems" xlink:to="csan_ForeignCurrencyExchangeRate" xlink:title="Definition : csan_DisclosureOfForeignExchangeRatesLineItems to csan_ForeignCurrencyExchangeRate" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfMarketValueOfSeniorNotesThatAreListedOnLuxembourgStockExchangeDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:title="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DebtInstrumentQuotedMarketPricePercentage" xlink:label="csan_DebtInstrumentQuotedMarketPricePercentage" xlink:title="csan_DebtInstrumentQuotedMarketPricePercentage"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="csan_DebtInstrumentQuotedMarketPricePercentage" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to csan_DebtInstrumentQuotedMarketPricePercentage" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:title="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="ifrs-full_BorrowingsByNameAxis" xlink:title="ifrs-full_BorrowingsByNameAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_BorrowingsByNameAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable to ifrs-full_BorrowingsByNameAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember" xlink:title="ifrs-full_BorrowingsByNameMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember" xlink:title="Definition : ifrs-full_BorrowingsByNameAxis to ifrs-full_BorrowingsByNameMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDueTwoThousandTwentyThreeMember" xlink:label="csan_SeniorNotesDueTwoThousandTwentyThreeMember" xlink:title="csan_SeniorNotesDueTwoThousandTwentyThreeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDueTwoThousandTwentyThreeMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDueTwoThousandTwentyThreeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDueTwoThousandAndTwentyFourMember" xlink:label="csan_SeniorNotesDueTwoThousandAndTwentyFourMember" xlink:title="csan_SeniorNotesDueTwoThousandAndTwentyFourMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDueTwoThousandAndTwentyFourMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDueTwoThousandAndTwentyFourMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDueTwoThousandAndTwentyFourOneMember" xlink:label="csan_SeniorNotesDueTwoThousandAndTwentyFourOneMember" xlink:title="csan_SeniorNotesDueTwoThousandAndTwentyFourOneMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDueTwoThousandAndTwentyFourOneMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDueTwoThousandAndTwentyFourOneMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDueTwoThousandAndTwentyFiveMember" xlink:label="csan_SeniorNotesDueTwoThousandAndTwentyFiveMember" xlink:title="csan_SeniorNotesDueTwoThousandAndTwentyFiveMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDueTwoThousandAndTwentyFiveMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDueTwoThousandAndTwentyFiveMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDueTwoZeroTwoSevenMember" xlink:label="csan_SeniorNotesDueTwoZeroTwoSevenMember" xlink:title="csan_SeniorNotesDueTwoZeroTwoSevenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDueTwoZeroTwoSevenMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDueTwoZeroTwoSevenMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PerpetualNotesMember" xlink:label="csan_PerpetualNotesMember" xlink:title="csan_PerpetualNotesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_PerpetualNotesMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_PerpetualNotesMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDue2028Member" xlink:label="csan_SeniorNotesDue2028Member" xlink:title="csan_SeniorNotesDue2028Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDue2028Member" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDue2028Member" xlink:type="arc" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDue2029Member" xlink:label="csan_SeniorNotesDue2029Member" xlink:title="csan_SeniorNotesDue2029Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDue2029Member" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDue2029Member" xlink:type="arc" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember_1" xlink:title="ifrs-full_BorrowingsByNameMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember_1" xlink:title="Definition : ifrs-full_BorrowingsByNameAxis to ifrs-full_BorrowingsByNameMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasMember" xlink:label="csan_ComgasMember" xlink:title="csan_ComgasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ComgasMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ComgasMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoSAMember" xlink:label="csan_RumoSAMember" xlink:title="csan_RumoSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoSAMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:title="dei_LegalEntityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="dei_LegalEntityAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable to dei_LegalEntityAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAMember" xlink:label="csan_CosanSAMember" xlink:title="csan_CosanSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_CosanSAMember" xlink:title="Definition : dei_EntityDomain to csan_CosanSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLimitedMember" xlink:label="csan_CosanLimitedMember" xlink:title="csan_CosanLimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_CosanLimitedMember" xlink:title="Definition : dei_EntityDomain to csan_CosanLimitedMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain_1" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain_1" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialriskmanagementScheduleofoutstandingenergytradingoperationsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsLineItems" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsLineItems" xlink:title="ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentAssets" xlink:label="ifrs-full_HedgingInstrumentAssets" xlink:title="ifrs-full_HedgingInstrumentAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsLineItems" xlink:to="ifrs-full_HedgingInstrumentAssets" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsLineItems to ifrs-full_HedgingInstrumentAssets" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentLiabilities" xlink:label="ifrs-full_HedgingInstrumentLiabilities" xlink:title="ifrs-full_HedgingInstrumentLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsLineItems" xlink:to="ifrs-full_HedgingInstrumentLiabilities" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsLineItems to ifrs-full_HedgingInstrumentLiabilities" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GainLossOnChangeInFairValueOfHedgingInstrumentUsedAsBasisForRecognisingHedgeIneffectiveness" xlink:label="ifrs-full_GainLossOnChangeInFairValueOfHedgingInstrumentUsedAsBasisForRecognisingHedgeIneffectiveness" xlink:title="ifrs-full_GainLossOnChangeInFairValueOfHedgingInstrumentUsedAsBasisForRecognisingHedgeIneffectiveness"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsLineItems" xlink:to="ifrs-full_GainLossOnChangeInFairValueOfHedgingInstrumentUsedAsBasisForRecognisingHedgeIneffectiveness" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsLineItems to ifrs-full_GainLossOnChangeInFairValueOfHedgingInstrumentUsedAsBasisForRecognisingHedgeIneffectiveness" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable" xlink:title="ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsLineItems" xlink:to="ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsLineItems to ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable" xlink:type="arc" use="optional" order="3" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksAxis" xlink:label="ifrs-full_TypesOfRisksAxis" xlink:title="ifrs-full_TypesOfRisksAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable" xlink:to="ifrs-full_TypesOfRisksAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable to ifrs-full_TypesOfRisksAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksMember" xlink:label="ifrs-full_TypesOfRisksMember" xlink:title="ifrs-full_TypesOfRisksMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksMember" xlink:title="Definition : ifrs-full_TypesOfRisksAxis to ifrs-full_TypesOfRisksMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CommodityPriceRiskMember" xlink:label="ifrs-full_CommodityPriceRiskMember" xlink:title="ifrs-full_CommodityPriceRiskMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ifrs-full_CommodityPriceRiskMember" xlink:title="Definition : ifrs-full_TypesOfRisksMember to ifrs-full_CommodityPriceRiskMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksMember" xlink:label="ifrs-full_TypesOfRisksMember_1" xlink:title="ifrs-full_TypesOfRisksMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksMember_1" xlink:title="Definition : ifrs-full_TypesOfRisksAxis to ifrs-full_TypesOfRisksMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesAxis" xlink:label="ifrs-full_ProductsAndServicesAxis" xlink:title="ifrs-full_ProductsAndServicesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable" xlink:to="ifrs-full_ProductsAndServicesAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsTable to ifrs-full_ProductsAndServicesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesMember" xlink:label="ifrs-full_ProductsAndServicesMember" xlink:title="ifrs-full_ProductsAndServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ProductsAndServicesAxis" xlink:to="ifrs-full_ProductsAndServicesMember" xlink:title="Definition : ifrs-full_ProductsAndServicesAxis to ifrs-full_ProductsAndServicesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ElectricityDistributionMember" xlink:label="ifrs-full_ElectricityDistributionMember" xlink:title="ifrs-full_ElectricityDistributionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="ifrs-full_ElectricityDistributionMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to ifrs-full_ElectricityDistributionMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesMember" xlink:label="ifrs-full_ProductsAndServicesMember_1" xlink:title="ifrs-full_ProductsAndServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ProductsAndServicesAxis" xlink:to="ifrs-full_ProductsAndServicesMember_1" xlink:title="Definition : ifrs-full_ProductsAndServicesAxis to ifrs-full_ProductsAndServicesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/SegmentInformationSummaryOfIncomeOrLossDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:label="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:title="ifrs-full_DisclosureOfOperatingSegmentsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CostOfSales" xlink:label="ifrs-full_CostOfSales" xlink:title="ifrs-full_CostOfSales"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_CostOfSales" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_CostOfSales" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:label="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:title="ifrs-full_DisclosureOfOperatingSegmentsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:title="ifrs-full_GeographicalAreasAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsTable to ifrs-full_GeographicalAreasAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:title="ifrs-full_GeographicalAreasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:title="Definition : ifrs-full_GeographicalAreasAxis to ifrs-full_GeographicalAreasMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CountryOfDomicileMember" xlink:label="ifrs-full_CountryOfDomicileMember" xlink:title="ifrs-full_CountryOfDomicileMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ifrs-full_CountryOfDomicileMember" xlink:title="Definition : ifrs-full_GeographicalAreasMember to ifrs-full_CountryOfDomicileMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ForeignCountriesMember" xlink:label="ifrs-full_ForeignCountriesMember" xlink:title="ifrs-full_ForeignCountriesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="ifrs-full_ForeignCountriesMember" xlink:title="Definition : ifrs-full_GeographicalAreasMember to ifrs-full_ForeignCountriesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember_1" xlink:title="ifrs-full_GeographicalAreasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember_1" xlink:title="Definition : ifrs-full_GeographicalAreasAxis to ifrs-full_GeographicalAreasMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentConsolidationItemsAxis" xlink:label="ifrs-full_SegmentConsolidationItemsAxis" xlink:title="ifrs-full_SegmentConsolidationItemsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:to="ifrs-full_SegmentConsolidationItemsAxis" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsTable to ifrs-full_SegmentConsolidationItemsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:label="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:title="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SegmentConsolidationItemsAxis" xlink:to="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:title="Definition : ifrs-full_SegmentConsolidationItemsAxis to ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DeconsolidationOfJointVenturesMember" xlink:label="csan_DeconsolidationOfJointVenturesMember" xlink:title="csan_DeconsolidationOfJointVenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:to="csan_DeconsolidationOfJointVenturesMember" xlink:title="Definition : ifrs-full_EntitysTotalForSegmentConsolidationItemsMember to csan_DeconsolidationOfJointVenturesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EliminationOfIntersegmentAmountsMember" xlink:label="ifrs-full_EliminationOfIntersegmentAmountsMember" xlink:title="ifrs-full_EliminationOfIntersegmentAmountsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:to="ifrs-full_EliminationOfIntersegmentAmountsMember" xlink:title="Definition : ifrs-full_EntitysTotalForSegmentConsolidationItemsMember to ifrs-full_EliminationOfIntersegmentAmountsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OperatingSegmentsMember" xlink:label="ifrs-full_OperatingSegmentsMember" xlink:title="ifrs-full_OperatingSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:to="ifrs-full_OperatingSegmentsMember" xlink:title="Definition : ifrs-full_EntitysTotalForSegmentConsolidationItemsMember to ifrs-full_OperatingSegmentsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_UnallocatedAmountsMember" xlink:label="ifrs-full_UnallocatedAmountsMember" xlink:title="ifrs-full_UnallocatedAmountsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:to="ifrs-full_UnallocatedAmountsMember" xlink:title="Definition : ifrs-full_EntitysTotalForSegmentConsolidationItemsMember to ifrs-full_UnallocatedAmountsMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:label="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_1" xlink:title="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SegmentConsolidationItemsAxis" xlink:to="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_1" xlink:title="Definition : ifrs-full_SegmentConsolidationItemsAxis to ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsAxis" xlink:label="ifrs-full_SegmentsAxis" xlink:title="ifrs-full_SegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:to="ifrs-full_SegmentsAxis" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsTable to ifrs-full_SegmentsAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember" xlink:title="ifrs-full_SegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember" xlink:title="Definition : ifrs-full_SegmentsAxis to ifrs-full_SegmentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompanhiaDeGasDeSaoPauloMember" xlink:label="csan_CompanhiaDeGasDeSaoPauloMember" xlink:title="csan_CompanhiaDeGasDeSaoPauloMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_CompanhiaDeGasDeSaoPauloMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_CompanhiaDeGasDeSaoPauloMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanCorporateMember" xlink:label="csan_CosanCorporateMember" xlink:title="csan_CosanCorporateMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_CosanCorporateMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_CosanCorporateMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LogisticsMember" xlink:label="csan_LogisticsMember" xlink:title="csan_LogisticsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_LogisticsMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_LogisticsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MooveMember" xlink:label="csan_MooveMember" xlink:title="csan_MooveMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_MooveMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_MooveMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenCombustiveisMember" xlink:label="csan_RaizenCombustiveisMember" xlink:title="csan_RaizenCombustiveisMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_RaizenCombustiveisMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_RaizenCombustiveisMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenEnergiaMember" xlink:label="csan_RaizenEnergiaMember" xlink:title="csan_RaizenEnergiaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_RaizenEnergiaMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_RaizenEnergiaMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GasAndEnergyMember" xlink:label="csan_GasAndEnergyMember" xlink:title="csan_GasAndEnergyMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_GasAndEnergyMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_GasAndEnergyMember" xlink:type="arc" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember_1" xlink:title="ifrs-full_SegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember_1" xlink:title="Definition : ifrs-full_SegmentsAxis to ifrs-full_SegmentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="srt_StatementGeographicalAxis" xlink:title="srt_StatementGeographicalAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:to="srt_StatementGeographicalAxis" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsTable to srt_StatementGeographicalAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain" xlink:title="srt_SegmentGeographicalDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain" xlink:title="Definition : srt_StatementGeographicalAxis to srt_SegmentGeographicalDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_AR" xlink:label="country_AR" xlink:title="country_AR"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_AR" xlink:title="Definition : srt_SegmentGeographicalDomain to country_AR" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_BR" xlink:label="country_BR" xlink:title="country_BR"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_BR" xlink:title="Definition : srt_SegmentGeographicalDomain to country_BR" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain_1" xlink:title="srt_SegmentGeographicalDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain_1" xlink:title="Definition : srt_StatementGeographicalAxis to srt_SegmentGeographicalDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinanceCosts" xlink:label="ifrs-full_FinanceCosts" xlink:title="ifrs-full_FinanceCosts"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_FinanceCosts" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_FinanceCosts" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinanceIncome" xlink:label="ifrs-full_FinanceIncome" xlink:title="ifrs-full_FinanceIncome"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_FinanceIncome" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_FinanceIncome" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinanceIncomeCost" xlink:label="ifrs-full_FinanceIncomeCost" xlink:title="ifrs-full_FinanceIncomeCost"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_FinanceIncomeCost" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_FinanceIncomeCost" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives" xlink:label="ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives" xlink:title="ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:label="ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:title="ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GrossProfit" xlink:label="ifrs-full_GrossProfit" xlink:title="ifrs-full_GrossProfit"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_GrossProfit" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_GrossProfit" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GrossRevenue" xlink:label="csan_GrossRevenue" xlink:title="csan_GrossRevenue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="csan_GrossRevenue" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to csan_GrossRevenue" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:label="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:title="ifrs-full_IncomeTaxExpenseContinuingOperations"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherOperatingIncomeExpense" xlink:label="ifrs-full_OtherOperatingIncomeExpense" xlink:title="ifrs-full_OtherOperatingIncomeExpense"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_OtherOperatingIncomeExpense" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_OtherOperatingIncomeExpense" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherSelectedDataAbstract" xlink:label="csan_OtherSelectedDataAbstract" xlink:title="csan_OtherSelectedDataAbstract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="csan_OtherSelectedDataAbstract" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to csan_OtherSelectedDataAbstract" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EarningsBeforeInterestTaxDepreciationAndAmortization" xlink:label="csan_EarningsBeforeInterestTaxDepreciationAndAmortization" xlink:title="csan_EarningsBeforeInterestTaxDepreciationAndAmortization"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_OtherSelectedDataAbstract" xlink:to="csan_EarningsBeforeInterestTaxDepreciationAndAmortization" xlink:title="Definition : csan_OtherSelectedDataAbstract to csan_EarningsBeforeInterestTaxDepreciationAndAmortization" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DepreciationAndAmortisationExpense" xlink:label="ifrs-full_DepreciationAndAmortisationExpense" xlink:title="ifrs-full_DepreciationAndAmortisationExpense"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_OtherSelectedDataAbstract" xlink:to="ifrs-full_DepreciationAndAmortisationExpense" xlink:title="Definition : csan_OtherSelectedDataAbstract to ifrs-full_DepreciationAndAmortisationExpense" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AdditionsToPropertyPlantAndEquipmentIntangibleAndContractAssets" xlink:label="csan_AdditionsToPropertyPlantAndEquipmentIntangibleAndContractAssets" xlink:title="csan_AdditionsToPropertyPlantAndEquipmentIntangibleAndContractAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_OtherSelectedDataAbstract" xlink:to="csan_AdditionsToPropertyPlantAndEquipmentIntangibleAndContractAssets" xlink:title="Definition : csan_OtherSelectedDataAbstract to csan_AdditionsToPropertyPlantAndEquipmentIntangibleAndContractAssets" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossAttributableToAbstract" xlink:label="ifrs-full_ProfitLossAttributableToAbstract" xlink:title="ifrs-full_ProfitLossAttributableToAbstract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_ProfitLossAttributableToAbstract" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_ProfitLossAttributableToAbstract" xlink:type="arc" use="optional" order="12" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLoss" xlink:label="ifrs-full_ProfitLoss" xlink:title="ifrs-full_ProfitLoss"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProfitLossAttributableToAbstract" xlink:to="ifrs-full_ProfitLoss" xlink:title="Definition : ifrs-full_ProfitLossAttributableToAbstract to ifrs-full_ProfitLoss" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:label="ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:title="ifrs-full_ProfitLossAttributableToNoncontrollingInterests"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProfitLossAttributableToAbstract" xlink:to="ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:title="Definition : ifrs-full_ProfitLossAttributableToAbstract to ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:label="ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:title="ifrs-full_ProfitLossAttributableToOwnersOfParent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProfitLossAttributableToAbstract" xlink:to="ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:title="Definition : ifrs-full_ProfitLossAttributableToAbstract to ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossFromContinuingOperations" xlink:label="ifrs-full_ProfitLossFromContinuingOperations" xlink:title="ifrs-full_ProfitLossFromContinuingOperations"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_ProfitLossFromContinuingOperations" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_ProfitLossFromContinuingOperations" xlink:type="arc" use="optional" order="13" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossFromDiscontinuedOperations" xlink:label="ifrs-full_ProfitLossFromDiscontinuedOperations" xlink:title="ifrs-full_ProfitLossFromDiscontinuedOperations"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_ProfitLossFromDiscontinuedOperations" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_ProfitLossFromDiscontinuedOperations" xlink:type="arc" use="optional" order="14" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ReconciliationOfEarningsBeforeInterestTaxDepreciationAndAmortizationAbstract" xlink:label="csan_ReconciliationOfEarningsBeforeInterestTaxDepreciationAndAmortizationAbstract" xlink:title="csan_ReconciliationOfEarningsBeforeInterestTaxDepreciationAndAmortizationAbstract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="csan_ReconciliationOfEarningsBeforeInterestTaxDepreciationAndAmortizationAbstract" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to csan_ReconciliationOfEarningsBeforeInterestTaxDepreciationAndAmortizationAbstract" xlink:type="arc" use="optional" order="15" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Revenue" xlink:label="ifrs-full_Revenue" xlink:title="ifrs-full_Revenue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_Revenue" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_Revenue" xlink:type="arc" use="optional" order="16" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod" xlink:label="ifrs-full_ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod" xlink:title="ifrs-full_ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod" xlink:type="arc" use="optional" order="17" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod" xlink:label="ifrs-full_ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod" xlink:title="ifrs-full_ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod" xlink:type="arc" use="optional" order="18" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SellingExpense" xlink:label="ifrs-full_SellingExpense" xlink:title="ifrs-full_SellingExpense"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_SellingExpense" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_SellingExpense" xlink:type="arc" use="optional" order="19" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeneralAndAdministrativeExpense" xlink:label="ifrs-full_GeneralAndAdministrativeExpense" xlink:title="ifrs-full_GeneralAndAdministrativeExpense"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_GeneralAndAdministrativeExpense" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_GeneralAndAdministrativeExpense" xlink:type="arc" use="optional" order="20" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/SegmentInformationSummaryOfFinancialPositionDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:label="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:title="ifrs-full_DisclosureOfOperatingSegmentsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:label="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:title="ifrs-full_DisclosureOfOperatingSegmentsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentConsolidationItemsAxis" xlink:label="ifrs-full_SegmentConsolidationItemsAxis" xlink:title="ifrs-full_SegmentConsolidationItemsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:to="ifrs-full_SegmentConsolidationItemsAxis" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsTable to ifrs-full_SegmentConsolidationItemsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:label="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:title="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SegmentConsolidationItemsAxis" xlink:to="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:title="Definition : ifrs-full_SegmentConsolidationItemsAxis to ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DeconsolidationEffectsIFRS11Member" xlink:label="csan_DeconsolidationEffectsIFRS11Member" xlink:title="csan_DeconsolidationEffectsIFRS11Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:to="csan_DeconsolidationEffectsIFRS11Member" xlink:title="Definition : ifrs-full_EntitysTotalForSegmentConsolidationItemsMember to csan_DeconsolidationEffectsIFRS11Member" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EliminationOfIntersegmentAmountsMember" xlink:label="ifrs-full_EliminationOfIntersegmentAmountsMember" xlink:title="ifrs-full_EliminationOfIntersegmentAmountsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:to="ifrs-full_EliminationOfIntersegmentAmountsMember" xlink:title="Definition : ifrs-full_EntitysTotalForSegmentConsolidationItemsMember to ifrs-full_EliminationOfIntersegmentAmountsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OperatingSegmentsMember" xlink:label="ifrs-full_OperatingSegmentsMember" xlink:title="ifrs-full_OperatingSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:to="ifrs-full_OperatingSegmentsMember" xlink:title="Definition : ifrs-full_EntitysTotalForSegmentConsolidationItemsMember to ifrs-full_OperatingSegmentsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_UnallocatedAmountsMember" xlink:label="ifrs-full_UnallocatedAmountsMember" xlink:title="ifrs-full_UnallocatedAmountsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:to="ifrs-full_UnallocatedAmountsMember" xlink:title="Definition : ifrs-full_EntitysTotalForSegmentConsolidationItemsMember to ifrs-full_UnallocatedAmountsMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:label="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_1" xlink:title="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SegmentConsolidationItemsAxis" xlink:to="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_1" xlink:title="Definition : ifrs-full_SegmentConsolidationItemsAxis to ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsAxis" xlink:label="ifrs-full_SegmentsAxis" xlink:title="ifrs-full_SegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:to="ifrs-full_SegmentsAxis" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsTable to ifrs-full_SegmentsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember" xlink:title="ifrs-full_SegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember" xlink:title="Definition : ifrs-full_SegmentsAxis to ifrs-full_SegmentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompanhiaDeGasDeSaoPauloMember" xlink:label="csan_CompanhiaDeGasDeSaoPauloMember" xlink:title="csan_CompanhiaDeGasDeSaoPauloMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_CompanhiaDeGasDeSaoPauloMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_CompanhiaDeGasDeSaoPauloMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanCorporateMember" xlink:label="csan_CosanCorporateMember" xlink:title="csan_CosanCorporateMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_CosanCorporateMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_CosanCorporateMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LogisticsMember" xlink:label="csan_LogisticsMember" xlink:title="csan_LogisticsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_LogisticsMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_LogisticsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MooveMember" xlink:label="csan_MooveMember" xlink:title="csan_MooveMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_MooveMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_MooveMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenCombustiveisMember" xlink:label="csan_RaizenCombustiveisMember" xlink:title="csan_RaizenCombustiveisMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_RaizenCombustiveisMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_RaizenCombustiveisMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenEnergiaMember" xlink:label="csan_RaizenEnergiaMember" xlink:title="csan_RaizenEnergiaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_RaizenEnergiaMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_RaizenEnergiaMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GasAndEnergyMember" xlink:label="csan_GasAndEnergyMember" xlink:title="csan_GasAndEnergyMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_GasAndEnergyMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_GasAndEnergyMember" xlink:type="arc" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember_1" xlink:title="ifrs-full_SegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember_1" xlink:title="Definition : ifrs-full_SegmentsAxis to ifrs-full_SegmentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:title="ifrs-full_GeographicalAreasAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsTable to ifrs-full_GeographicalAreasAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:title="ifrs-full_GeographicalAreasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:title="Definition : ifrs-full_GeographicalAreasAxis to ifrs-full_GeographicalAreasMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_BR" xlink:label="country_BR" xlink:title="country_BR"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_BR" xlink:title="Definition : ifrs-full_GeographicalAreasMember to country_BR" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_AR" xlink:label="country_AR" xlink:title="country_AR"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_AR" xlink:title="Definition : ifrs-full_GeographicalAreasMember to country_AR" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember_1" xlink:title="ifrs-full_GeographicalAreasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember_1" xlink:title="Definition : ifrs-full_GeographicalAreasAxis to ifrs-full_GeographicalAreasMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ShareholdersEquityAttributableToAbstract" xlink:label="csan_ShareholdersEquityAttributableToAbstract" xlink:title="csan_ShareholdersEquityAttributableToAbstract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="csan_ShareholdersEquityAttributableToAbstract" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to csan_ShareholdersEquityAttributableToAbstract" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EquityAttributableToOwnersOfParent" xlink:label="ifrs-full_EquityAttributableToOwnersOfParent" xlink:title="ifrs-full_EquityAttributableToOwnersOfParent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_ShareholdersEquityAttributableToAbstract" xlink:to="ifrs-full_EquityAttributableToOwnersOfParent" xlink:title="Definition : csan_ShareholdersEquityAttributableToAbstract to ifrs-full_EquityAttributableToOwnersOfParent" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncontrollingInterests" xlink:label="ifrs-full_NoncontrollingInterests" xlink:title="ifrs-full_NoncontrollingInterests"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_ShareholdersEquityAttributableToAbstract" xlink:to="ifrs-full_NoncontrollingInterests" xlink:title="Definition : csan_ShareholdersEquityAttributableToAbstract to ifrs-full_NoncontrollingInterests" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_StatementOfFinancialPositionAbstract" xlink:label="ifrs-full_StatementOfFinancialPositionAbstract" xlink:title="ifrs-full_StatementOfFinancialPositionAbstract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_StatementOfFinancialPositionAbstract" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_StatementOfFinancialPositionAbstract" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Equity" xlink:label="ifrs-full_Equity" xlink:title="ifrs-full_Equity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_Equity" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to ifrs-full_Equity" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Assets" xlink:label="ifrs-full_Assets" xlink:title="ifrs-full_Assets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_Assets" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to ifrs-full_Assets" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BiologicalAssets" xlink:label="ifrs-full_BiologicalAssets" xlink:title="ifrs-full_BiologicalAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_BiologicalAssets" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to ifrs-full_BiologicalAssets" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Borrowings" xlink:label="ifrs-full_Borrowings" xlink:title="ifrs-full_Borrowings"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_Borrowings" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to ifrs-full_Borrowings" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashAndCashEquivalents" xlink:label="ifrs-full_CashAndCashEquivalents" xlink:title="ifrs-full_CashAndCashEquivalents"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_CashAndCashEquivalents" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to ifrs-full_CashAndCashEquivalents" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:label="ifrs-full_CurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:title="ifrs-full_CurrentRecognisedLiabilitiesDefinedBenefitPlan"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_CurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to ifrs-full_CurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DerivativeFinancialAssets" xlink:label="ifrs-full_DerivativeFinancialAssets" xlink:title="ifrs-full_DerivativeFinancialAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_DerivativeFinancialAssets" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to ifrs-full_DerivativeFinancialAssets" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DerivativeFinancialLiabilities" xlink:label="ifrs-full_DerivativeFinancialLiabilities" xlink:title="ifrs-full_DerivativeFinancialLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_DerivativeFinancialLiabilities" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to ifrs-full_DerivativeFinancialLiabilities" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LeaseLiabilitiesFinance" xlink:label="csan_LeaseLiabilitiesFinance" xlink:title="csan_LeaseLiabilitiesFinance"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="csan_LeaseLiabilitiesFinance" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to csan_LeaseLiabilitiesFinance" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwill" xlink:label="ifrs-full_IntangibleAssetsAndGoodwill" xlink:title="ifrs-full_IntangibleAssetsAndGoodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_IntangibleAssetsAndGoodwill" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to ifrs-full_IntangibleAssetsAndGoodwill" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Inventories" xlink:label="ifrs-full_Inventories" xlink:title="ifrs-full_Inventories"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_Inventories" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to ifrs-full_Inventories" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InvestmentsInAssociatesAccountedForUsingEquityMethod" xlink:label="ifrs-full_InvestmentsInAssociatesAccountedForUsingEquityMethod" xlink:title="ifrs-full_InvestmentsInAssociatesAccountedForUsingEquityMethod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_InvestmentsInAssociatesAccountedForUsingEquityMethod" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to ifrs-full_InvestmentsInAssociatesAccountedForUsingEquityMethod" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InvestmentsInJointVenturesAccountedForUsingEquityMethod" xlink:label="ifrs-full_InvestmentsInJointVenturesAccountedForUsingEquityMethod" xlink:title="ifrs-full_InvestmentsInJointVenturesAccountedForUsingEquityMethod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_InvestmentsInJointVenturesAccountedForUsingEquityMethod" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to ifrs-full_InvestmentsInJointVenturesAccountedForUsingEquityMethod" xlink:type="arc" use="optional" order="12" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MarketableSecurities1" xlink:label="csan_MarketableSecurities1" xlink:title="csan_MarketableSecurities1"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="csan_MarketableSecurities1" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to csan_MarketableSecurities1" xlink:type="arc" use="optional" order="13" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherCurrentAssetsOther" xlink:label="csan_OtherCurrentAssetsOther" xlink:title="csan_OtherCurrentAssetsOther"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="csan_OtherCurrentAssetsOther" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to csan_OtherCurrentAssetsOther" xlink:type="arc" use="optional" order="14" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherCurrentLiabilitiesClassifiedAsOther" xlink:label="csan_OtherCurrentLiabilitiesClassifiedAsOther" xlink:title="csan_OtherCurrentLiabilitiesClassifiedAsOther"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="csan_OtherCurrentLiabilitiesClassifiedAsOther" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to csan_OtherCurrentLiabilitiesClassifiedAsOther" xlink:type="arc" use="optional" order="15" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherFinancialAssets" xlink:label="ifrs-full_OtherFinancialAssets" xlink:title="ifrs-full_OtherFinancialAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_OtherFinancialAssets" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to ifrs-full_OtherFinancialAssets" xlink:type="arc" use="optional" order="16" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherNonCurrentAssetsOther" xlink:label="csan_OtherNonCurrentAssetsOther" xlink:title="csan_OtherNonCurrentAssetsOther"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="csan_OtherNonCurrentAssetsOther" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to csan_OtherNonCurrentAssetsOther" xlink:type="arc" use="optional" order="17" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherNoncurrentLiabilitiesOther" xlink:label="csan_OtherNoncurrentLiabilitiesOther" xlink:title="csan_OtherNoncurrentLiabilitiesOther"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="csan_OtherNoncurrentLiabilitiesOther" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to csan_OtherNoncurrentLiabilitiesOther" xlink:type="arc" use="optional" order="18" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PreferredShareholdersPayableSubsidiariesNonCurrent" xlink:label="csan_PreferredShareholdersPayableSubsidiariesNonCurrent" xlink:title="csan_PreferredShareholdersPayableSubsidiariesNonCurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="csan_PreferredShareholdersPayableSubsidiariesNonCurrent" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to csan_PreferredShareholdersPayableSubsidiariesNonCurrent" xlink:type="arc" use="optional" order="19" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipment" xlink:label="ifrs-full_PropertyPlantAndEquipment" xlink:title="ifrs-full_PropertyPlantAndEquipment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_PropertyPlantAndEquipment" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to ifrs-full_PropertyPlantAndEquipment" xlink:type="arc" use="optional" order="20" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TradePayable" xlink:label="csan_TradePayable" xlink:title="csan_TradePayable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="csan_TradePayable" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to csan_TradePayable" xlink:type="arc" use="optional" order="21" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TradeReceivables" xlink:label="ifrs-full_TradeReceivables" xlink:title="ifrs-full_TradeReceivables"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_TradeReceivables" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to ifrs-full_TradeReceivables" xlink:type="arc" use="optional" order="22" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RightofuseAssets" xlink:label="ifrs-full_RightofuseAssets" xlink:title="ifrs-full_RightofuseAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_RightofuseAssets" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to ifrs-full_RightofuseAssets" xlink:type="arc" use="optional" order="23" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentContractAssets" xlink:label="ifrs-full_NoncurrentContractAssets" xlink:title="ifrs-full_NoncurrentContractAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_NoncurrentContractAssets" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to ifrs-full_NoncurrentContractAssets" xlink:type="arc" use="optional" order="24" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Liabilities" xlink:label="ifrs-full_Liabilities" xlink:title="ifrs-full_Liabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_Liabilities" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to ifrs-full_Liabilities" xlink:type="arc" use="optional" order="25" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CurrentSectorFinancialAssets" xlink:label="csan_CurrentSectorFinancialAssets" xlink:title="csan_CurrentSectorFinancialAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="csan_CurrentSectorFinancialAssets" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to csan_CurrentSectorFinancialAssets" xlink:type="arc" order="26" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SectorFinancialLiabilities" xlink:label="csan_SectorFinancialLiabilities" xlink:title="csan_SectorFinancialLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="csan_SectorFinancialLiabilities" xlink:title="Definition : ifrs-full_StatementOfFinancialPositionAbstract to csan_SectorFinancialLiabilities" xlink:type="arc" order="27" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/SegmentInformationSummaryofNetSalesbyCustomerbySegmentDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:label="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:title="ifrs-full_DisclosureOfOperatingSegmentsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:label="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:title="ifrs-full_DisclosureOfOperatingSegmentsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:title="ifrs-full_GeographicalAreasAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsTable to ifrs-full_GeographicalAreasAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:title="ifrs-full_GeographicalAreasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:title="Definition : ifrs-full_GeographicalAreasAxis to ifrs-full_GeographicalAreasMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NorthOperationsMember" xlink:label="csan_NorthOperationsMember" xlink:title="csan_NorthOperationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="csan_NorthOperationsMember" xlink:title="Definition : ifrs-full_GeographicalAreasMember to csan_NorthOperationsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SouthOperationsMember" xlink:label="csan_SouthOperationsMember" xlink:title="csan_SouthOperationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="csan_SouthOperationsMember" xlink:title="Definition : ifrs-full_GeographicalAreasMember to csan_SouthOperationsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember_1" xlink:title="ifrs-full_GeographicalAreasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember_1" xlink:title="Definition : ifrs-full_GeographicalAreasAxis to ifrs-full_GeographicalAreasMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesAxis" xlink:label="ifrs-full_ProductsAndServicesAxis" xlink:title="ifrs-full_ProductsAndServicesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:to="ifrs-full_ProductsAndServicesAxis" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsTable to ifrs-full_ProductsAndServicesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesMember" xlink:label="ifrs-full_ProductsAndServicesMember" xlink:title="ifrs-full_ProductsAndServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ProductsAndServicesAxis" xlink:to="ifrs-full_ProductsAndServicesMember" xlink:title="Definition : ifrs-full_ProductsAndServicesAxis to ifrs-full_ProductsAndServicesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AutomotiveMember" xlink:label="csan_AutomotiveMember" xlink:title="csan_AutomotiveMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_AutomotiveMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_AutomotiveMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BasicOilMember" xlink:label="csan_BasicOilMember" xlink:title="csan_BasicOilMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_BasicOilMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_BasicOilMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CogenerationMember" xlink:label="csan_CogenerationMember" xlink:title="csan_CogenerationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_CogenerationMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_CogenerationMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CommercialMember" xlink:label="csan_CommercialMember" xlink:title="csan_CommercialMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_CommercialMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_CommercialMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ConstructionRevenueMember" xlink:label="csan_ConstructionRevenueMember" xlink:title="csan_ConstructionRevenueMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_ConstructionRevenueMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_ConstructionRevenueMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ContainerOperationsMember" xlink:label="csan_ContainerOperationsMember" xlink:title="csan_ContainerOperationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_ContainerOperationsMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_ContainerOperationsMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DieselMember" xlink:label="csan_DieselMember" xlink:title="csan_DieselMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_DieselMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_DieselMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EthanolMember" xlink:label="csan_EthanolMember" xlink:title="csan_EthanolMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_EthanolMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_EthanolMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FinishedGoodsMember" xlink:label="csan_FinishedGoodsMember" xlink:title="csan_FinishedGoodsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_FinishedGoodsMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_FinishedGoodsMember" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FuelsMember" xlink:label="csan_FuelsMember" xlink:title="csan_FuelsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_FuelsMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_FuelsMember" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GasMember" xlink:label="csan_GasMember" xlink:title="csan_GasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_GasMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_GasMember" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IndustrialMember" xlink:label="csan_IndustrialMember" xlink:title="csan_IndustrialMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_IndustrialMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_IndustrialMember" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherMember" xlink:label="csan_OtherMember" xlink:title="csan_OtherMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_OtherMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_OtherMember" xlink:type="arc" use="optional" order="12" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ResidentialMember" xlink:label="csan_ResidentialMember" xlink:title="csan_ResidentialMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_ResidentialMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_ResidentialMember" xlink:type="arc" use="optional" order="13" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ServicesMember" xlink:label="csan_ServicesMember" xlink:title="csan_ServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_ServicesMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_ServicesMember" xlink:type="arc" use="optional" order="14" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SugarMember" xlink:label="csan_SugarMember" xlink:title="csan_SugarMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_SugarMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_SugarMember" xlink:type="arc" use="optional" order="15" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesMember" xlink:label="ifrs-full_ProductsAndServicesMember_1" xlink:title="ifrs-full_ProductsAndServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ProductsAndServicesAxis" xlink:to="ifrs-full_ProductsAndServicesMember_1" xlink:title="Definition : ifrs-full_ProductsAndServicesAxis to ifrs-full_ProductsAndServicesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentConsolidationItemsAxis" xlink:label="ifrs-full_SegmentConsolidationItemsAxis" xlink:title="ifrs-full_SegmentConsolidationItemsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:to="ifrs-full_SegmentConsolidationItemsAxis" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsTable to ifrs-full_SegmentConsolidationItemsAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:label="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:title="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SegmentConsolidationItemsAxis" xlink:to="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:title="Definition : ifrs-full_SegmentConsolidationItemsAxis to ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DeconsolidationOfJointVenturesAdjustmentsAndEliminationsMember" xlink:label="csan_DeconsolidationOfJointVenturesAdjustmentsAndEliminationsMember" xlink:title="csan_DeconsolidationOfJointVenturesAdjustmentsAndEliminationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:to="csan_DeconsolidationOfJointVenturesAdjustmentsAndEliminationsMember" xlink:title="Definition : ifrs-full_EntitysTotalForSegmentConsolidationItemsMember to csan_DeconsolidationOfJointVenturesAdjustmentsAndEliminationsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OperatingSegmentsMember" xlink:label="ifrs-full_OperatingSegmentsMember" xlink:title="ifrs-full_OperatingSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:to="ifrs-full_OperatingSegmentsMember" xlink:title="Definition : ifrs-full_EntitysTotalForSegmentConsolidationItemsMember to ifrs-full_OperatingSegmentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_UnallocatedAmountsMember" xlink:label="ifrs-full_UnallocatedAmountsMember" xlink:title="ifrs-full_UnallocatedAmountsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:to="ifrs-full_UnallocatedAmountsMember" xlink:title="Definition : ifrs-full_EntitysTotalForSegmentConsolidationItemsMember to ifrs-full_UnallocatedAmountsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:label="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_1" xlink:title="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SegmentConsolidationItemsAxis" xlink:to="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_1" xlink:title="Definition : ifrs-full_SegmentConsolidationItemsAxis to ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsAxis" xlink:label="ifrs-full_SegmentsAxis" xlink:title="ifrs-full_SegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:to="ifrs-full_SegmentsAxis" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsTable to ifrs-full_SegmentsAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember" xlink:title="ifrs-full_SegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember" xlink:title="Definition : ifrs-full_SegmentsAxis to ifrs-full_SegmentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanCorporateMember" xlink:label="csan_CosanCorporateMember" xlink:title="csan_CosanCorporateMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_CosanCorporateMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_CosanCorporateMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LogisticsMember" xlink:label="csan_LogisticsMember" xlink:title="csan_LogisticsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_LogisticsMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_LogisticsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MooveMember" xlink:label="csan_MooveMember" xlink:title="csan_MooveMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_MooveMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_MooveMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenCombustiveisMember" xlink:label="csan_RaizenCombustiveisMember" xlink:title="csan_RaizenCombustiveisMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_RaizenCombustiveisMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_RaizenCombustiveisMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenEnergiaMember" xlink:label="csan_RaizenEnergiaMember" xlink:title="csan_RaizenEnergiaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_RaizenEnergiaMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_RaizenEnergiaMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GasAndEnergyMember" xlink:label="csan_GasAndEnergyMember" xlink:title="csan_GasAndEnergyMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_GasAndEnergyMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_GasAndEnergyMember" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember_1" xlink:title="ifrs-full_SegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember_1" xlink:title="Definition : ifrs-full_SegmentsAxis to ifrs-full_SegmentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRateregulatedActivitiesAxis" xlink:label="ifrs-full_TypesOfRateregulatedActivitiesAxis" xlink:title="ifrs-full_TypesOfRateregulatedActivitiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:to="ifrs-full_TypesOfRateregulatedActivitiesAxis" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsTable to ifrs-full_TypesOfRateregulatedActivitiesAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RateregulatedActivitiesMember" xlink:label="ifrs-full_RateregulatedActivitiesMember" xlink:title="ifrs-full_RateregulatedActivitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfRateregulatedActivitiesAxis" xlink:to="ifrs-full_RateregulatedActivitiesMember" xlink:title="Definition : ifrs-full_TypesOfRateregulatedActivitiesAxis to ifrs-full_RateregulatedActivitiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GasDistributionMember" xlink:label="ifrs-full_GasDistributionMember" xlink:title="ifrs-full_GasDistributionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RateregulatedActivitiesMember" xlink:to="ifrs-full_GasDistributionMember" xlink:title="Definition : ifrs-full_RateregulatedActivitiesMember to ifrs-full_GasDistributionMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ElectricityDistributionMember" xlink:label="ifrs-full_ElectricityDistributionMember" xlink:title="ifrs-full_ElectricityDistributionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RateregulatedActivitiesMember" xlink:to="ifrs-full_ElectricityDistributionMember" xlink:title="Definition : ifrs-full_RateregulatedActivitiesMember to ifrs-full_ElectricityDistributionMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RateregulatedActivitiesMember" xlink:label="ifrs-full_RateregulatedActivitiesMember_1" xlink:title="ifrs-full_RateregulatedActivitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfRateregulatedActivitiesAxis" xlink:to="ifrs-full_RateregulatedActivitiesMember_1" xlink:title="Definition : ifrs-full_TypesOfRateregulatedActivitiesAxis to ifrs-full_RateregulatedActivitiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Revenue" xlink:label="ifrs-full_Revenue" xlink:title="ifrs-full_Revenue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_Revenue" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_Revenue" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/SegmentInformationSummaryofInformationonGeographicalAreaDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfGeographicalAreasLineItems" xlink:label="ifrs-full_DisclosureOfGeographicalAreasLineItems" xlink:title="ifrs-full_DisclosureOfGeographicalAreasLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfGeographicalAreasTable" xlink:label="ifrs-full_DisclosureOfGeographicalAreasTable" xlink:title="ifrs-full_DisclosureOfGeographicalAreasTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfGeographicalAreasLineItems" xlink:to="ifrs-full_DisclosureOfGeographicalAreasTable" xlink:title="Definition : ifrs-full_DisclosureOfGeographicalAreasLineItems to ifrs-full_DisclosureOfGeographicalAreasTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="srt_StatementGeographicalAxis" xlink:title="srt_StatementGeographicalAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfGeographicalAreasTable" xlink:to="srt_StatementGeographicalAxis" xlink:title="Definition : ifrs-full_DisclosureOfGeographicalAreasTable to srt_StatementGeographicalAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain" xlink:title="srt_SegmentGeographicalDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain" xlink:title="Definition : srt_StatementGeographicalAxis to srt_SegmentGeographicalDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AsiaAndOtherMember" xlink:label="csan_AsiaAndOtherMember" xlink:title="csan_AsiaAndOtherMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="csan_AsiaAndOtherMember" xlink:title="Definition : srt_SegmentGeographicalDomain to csan_AsiaAndOtherMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_BR" xlink:label="country_BR" xlink:title="country_BR"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_BR" xlink:title="Definition : srt_SegmentGeographicalDomain to country_BR" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_EuropeMember" xlink:label="srt_EuropeMember" xlink:title="srt_EuropeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="srt_EuropeMember" xlink:title="Definition : srt_SegmentGeographicalDomain to srt_EuropeMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_LatinAmericaMember" xlink:label="srt_LatinAmericaMember" xlink:title="srt_LatinAmericaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="srt_LatinAmericaMember" xlink:title="Definition : srt_SegmentGeographicalDomain to srt_LatinAmericaMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_NorthAmericaMember" xlink:label="srt_NorthAmericaMember" xlink:title="srt_NorthAmericaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="srt_NorthAmericaMember" xlink:title="Definition : srt_SegmentGeographicalDomain to srt_NorthAmericaMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain_1" xlink:title="srt_SegmentGeographicalDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain_1" xlink:title="Definition : srt_StatementGeographicalAxis to srt_SegmentGeographicalDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Revenue" xlink:label="ifrs-full_Revenue" xlink:title="ifrs-full_Revenue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfGeographicalAreasLineItems" xlink:to="ifrs-full_Revenue" xlink:title="Definition : ifrs-full_DisclosureOfGeographicalAreasLineItems to ifrs-full_Revenue" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentAssetsOtherThanFinancialInstrumentsDeferredTaxAssetsPostemploymentBenefitAssetsAndRightsArisingUnderInsuranceContracts" xlink:label="ifrs-full_NoncurrentAssetsOtherThanFinancialInstrumentsDeferredTaxAssetsPostemploymentBenefitAssetsAndRightsArisingUnderInsuranceContracts" xlink:title="ifrs-full_NoncurrentAssetsOtherThanFinancialInstrumentsDeferredTaxAssetsPostemploymentBenefitAssetsAndRightsArisingUnderInsuranceContracts"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfGeographicalAreasLineItems" xlink:to="ifrs-full_NoncurrentAssetsOtherThanFinancialInstrumentsDeferredTaxAssetsPostemploymentBenefitAssetsAndRightsArisingUnderInsuranceContracts" xlink:title="Definition : ifrs-full_DisclosureOfGeographicalAreasLineItems to ifrs-full_NoncurrentAssetsOtherThanFinancialInstrumentsDeferredTaxAssetsPostemploymentBenefitAssetsAndRightsArisingUnderInsuranceContracts" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/SegmentInformationAdditionalInformationDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:label="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:title="ifrs-full_DisclosureOfOperatingSegmentsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:label="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:title="ifrs-full_DisclosureOfOperatingSegmentsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MajorCustomersAxis" xlink:label="ifrs-full_MajorCustomersAxis" xlink:title="ifrs-full_MajorCustomersAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:to="ifrs-full_MajorCustomersAxis" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsTable to ifrs-full_MajorCustomersAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MajorCustomersMember" xlink:label="ifrs-full_MajorCustomersMember" xlink:title="ifrs-full_MajorCustomersMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_MajorCustomersAxis" xlink:to="ifrs-full_MajorCustomersMember" xlink:title="Definition : ifrs-full_MajorCustomersAxis to ifrs-full_MajorCustomersMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MajorCustomerMember" xlink:label="csan_MajorCustomerMember" xlink:title="csan_MajorCustomerMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_MajorCustomersMember" xlink:to="csan_MajorCustomerMember" xlink:title="Definition : ifrs-full_MajorCustomersMember to csan_MajorCustomerMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MajorCustomersMember" xlink:label="ifrs-full_MajorCustomersMember_1" xlink:title="ifrs-full_MajorCustomersMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_MajorCustomersAxis" xlink:to="ifrs-full_MajorCustomersMember_1" xlink:title="Definition : ifrs-full_MajorCustomersAxis to ifrs-full_MajorCustomersMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InformationAboutMajorCustomers" xlink:label="ifrs-full_InformationAboutMajorCustomers" xlink:title="ifrs-full_InformationAboutMajorCustomers"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_InformationAboutMajorCustomers" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_InformationAboutMajorCustomers" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Revenue" xlink:label="ifrs-full_Revenue" xlink:title="ifrs-full_Revenue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:to="ifrs-full_Revenue" xlink:title="Definition : ifrs-full_DisclosureOfOperatingSegmentsLineItems to ifrs-full_Revenue" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialInstrumentsSummaryOfCarryingAmountOfFinancialLiabilitiesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:label="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:title="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialLiabilities" xlink:label="ifrs-full_FinancialLiabilities" xlink:title="ifrs-full_FinancialLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_FinancialLiabilities" xlink:title="Definition : ifrs-full_DisclosureOfFinancialLiabilitiesLineItems to ifrs-full_FinancialLiabilities" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:label="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:title="ifrs-full_DisclosureOfFinancialLiabilitiesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:title="Definition : ifrs-full_DisclosureOfFinancialLiabilitiesLineItems to ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:label="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:title="ifrs-full_CategoriesOfFinancialLiabilitiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:title="Definition : ifrs-full_DisclosureOfFinancialLiabilitiesTable to ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialLiabilitiesCategoryMember" xlink:label="ifrs-full_FinancialLiabilitiesCategoryMember" xlink:title="ifrs-full_FinancialLiabilitiesCategoryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_FinancialLiabilitiesCategoryMember" xlink:title="Definition : ifrs-full_CategoriesOfFinancialLiabilitiesAxis to ifrs-full_FinancialLiabilitiesCategoryMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialLiabilitiesAtAmortisedCostCategoryMember" xlink:label="ifrs-full_FinancialLiabilitiesAtAmortisedCostCategoryMember" xlink:title="ifrs-full_FinancialLiabilitiesAtAmortisedCostCategoryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialLiabilitiesCategoryMember" xlink:to="ifrs-full_FinancialLiabilitiesAtAmortisedCostCategoryMember" xlink:title="Definition : ifrs-full_FinancialLiabilitiesCategoryMember to ifrs-full_FinancialLiabilitiesAtAmortisedCostCategoryMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember" xlink:label="ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember" xlink:title="ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialLiabilitiesCategoryMember" xlink:to="ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember" xlink:title="Definition : ifrs-full_FinancialLiabilitiesCategoryMember to ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialLiabilitiesCategoryMember" xlink:label="ifrs-full_FinancialLiabilitiesCategoryMember_1" xlink:title="ifrs-full_FinancialLiabilitiesCategoryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_FinancialLiabilitiesCategoryMember_1" xlink:title="Definition : ifrs-full_CategoriesOfFinancialLiabilitiesAxis to ifrs-full_FinancialLiabilitiesCategoryMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:title="Definition : ifrs-full_DisclosureOfFinancialLiabilitiesTable to ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsAxis to ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LoansBorrowingsAndDebenturesMember" xlink:label="csan_LoansBorrowingsAndDebenturesMember" xlink:title="csan_LoansBorrowingsAndDebenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_LoansBorrowingsAndDebenturesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_LoansBorrowingsAndDebenturesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LeasesMember" xlink:label="csan_LeasesMember" xlink:title="csan_LeasesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_LeasesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_LeasesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TradePayablesMember" xlink:label="csan_TradePayablesMember" xlink:title="csan_TradePayablesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_TradePayablesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_TradePayablesMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherFinancialLiabilityMember" xlink:label="csan_OtherFinancialLiabilityMember" xlink:title="csan_OtherFinancialLiabilityMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_OtherFinancialLiabilityMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_OtherFinancialLiabilityMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PayablesToRelatedPartiesMember" xlink:label="csan_PayablesToRelatedPartiesMember" xlink:title="csan_PayablesToRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_PayablesToRelatedPartiesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_PayablesToRelatedPartiesMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RailroadConcessionPayableMember" xlink:label="csan_RailroadConcessionPayableMember" xlink:title="csan_RailroadConcessionPayableMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_RailroadConcessionPayableMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_RailroadConcessionPayableMember" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PreferredShareholdersPayableInSubsidiariesMember" xlink:label="csan_PreferredShareholdersPayableInSubsidiariesMember" xlink:title="csan_PreferredShareholdersPayableInSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_PreferredShareholdersPayableInSubsidiariesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_PreferredShareholdersPayableInSubsidiariesMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DividendsPayableMember" xlink:label="csan_DividendsPayableMember" xlink:title="csan_DividendsPayableMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_DividendsPayableMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_DividendsPayableMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SectorFinancialLiabilitiesMember" xlink:label="csan_SectorFinancialLiabilitiesMember" xlink:title="csan_SectorFinancialLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_SectorFinancialLiabilitiesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_SectorFinancialLiabilitiesMember" xlink:type="arc" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TaxInstallmentsREFISMember" xlink:label="csan_TaxInstallmentsREFISMember" xlink:title="csan_TaxInstallmentsREFISMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_TaxInstallmentsREFISMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_TaxInstallmentsREFISMember" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContingentConsiderationMember" xlink:label="ifrs-full_ContingentConsiderationMember" xlink:title="ifrs-full_ContingentConsiderationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="ifrs-full_ContingentConsiderationMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to ifrs-full_ContingentConsiderationMember" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DerivativesMember" xlink:label="ifrs-full_DerivativesMember" xlink:title="ifrs-full_DerivativesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="ifrs-full_DerivativesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to ifrs-full_DerivativesMember" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember_1" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember_1" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsAxis to ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialInstrumentsSummaryOfCarryingAmountOfFinancialAssetsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:label="ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:title="ifrs-full_DisclosureOfFinancialAssetsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssets" xlink:label="ifrs-full_FinancialAssets" xlink:title="ifrs-full_FinancialAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:to="ifrs-full_FinancialAssets" xlink:title="Definition : ifrs-full_DisclosureOfFinancialAssetsLineItems to ifrs-full_FinancialAssets" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsTable" xlink:label="ifrs-full_DisclosureOfFinancialAssetsTable" xlink:title="ifrs-full_DisclosureOfFinancialAssetsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:to="ifrs-full_DisclosureOfFinancialAssetsTable" xlink:title="Definition : ifrs-full_DisclosureOfFinancialAssetsLineItems to ifrs-full_DisclosureOfFinancialAssetsTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:label="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:title="ifrs-full_CategoriesOfFinancialAssetsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfFinancialAssetsTable" xlink:to="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:title="Definition : ifrs-full_DisclosureOfFinancialAssetsTable to ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsCategoryMember" xlink:label="ifrs-full_FinancialAssetsCategoryMember" xlink:title="ifrs-full_FinancialAssetsCategoryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsCategoryMember" xlink:title="Definition : ifrs-full_CategoriesOfFinancialAssetsAxis to ifrs-full_FinancialAssetsCategoryMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" xlink:label="ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" xlink:title="ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsCategoryMember" xlink:to="ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" xlink:title="Definition : ifrs-full_FinancialAssetsCategoryMember to ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember" xlink:label="ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember" xlink:title="ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsCategoryMember" xlink:to="ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember" xlink:title="Definition : ifrs-full_FinancialAssetsCategoryMember to ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsCategoryMember" xlink:label="ifrs-full_FinancialAssetsCategoryMember_1" xlink:title="ifrs-full_FinancialAssetsCategoryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsCategoryMember_1" xlink:title="Definition : ifrs-full_CategoriesOfFinancialAssetsAxis to ifrs-full_FinancialAssetsCategoryMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfFinancialAssetsTable" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:title="Definition : ifrs-full_DisclosureOfFinancialAssetsTable to ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsAxis to ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CashAndCashEquivalentMember" xlink:label="csan_CashAndCashEquivalentMember" xlink:title="csan_CashAndCashEquivalentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_CashAndCashEquivalentMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_CashAndCashEquivalentMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MarketableSecuritiesMember" xlink:label="csan_MarketableSecuritiesMember" xlink:title="csan_MarketableSecuritiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_MarketableSecuritiesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_MarketableSecuritiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DerivativesMember" xlink:label="ifrs-full_DerivativesMember" xlink:title="ifrs-full_DerivativesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="ifrs-full_DerivativesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to ifrs-full_DerivativesMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TradeReceivablesMember" xlink:label="ifrs-full_TradeReceivablesMember" xlink:title="ifrs-full_TradeReceivablesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="ifrs-full_TradeReceivablesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to ifrs-full_TradeReceivablesMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RestrictedCashMember" xlink:label="csan_RestrictedCashMember" xlink:title="csan_RestrictedCashMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_RestrictedCashMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_RestrictedCashMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ReceivablesFromRelatedPartiesMember" xlink:label="csan_ReceivablesFromRelatedPartiesMember" xlink:title="csan_ReceivablesFromRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_ReceivablesFromRelatedPartiesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_ReceivablesFromRelatedPartiesMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SectorFinancialAssetsMember" xlink:label="csan_SectorFinancialAssetsMember" xlink:title="csan_SectorFinancialAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_SectorFinancialAssetsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_SectorFinancialAssetsMember" xlink:type="arc" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DividendsReceivableMember" xlink:label="csan_DividendsReceivableMember" xlink:title="csan_DividendsReceivableMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_DividendsReceivableMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_DividendsReceivableMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherFinancialAssetMember" xlink:label="csan_OtherFinancialAssetMember" xlink:title="csan_OtherFinancialAssetMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_OtherFinancialAssetMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_OtherFinancialAssetMember" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember_1" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember_1" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsAxis to ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfFinancialInvestmentsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CashAndCashEquivalents1LineItems" xlink:label="csan_CashAndCashEquivalents1LineItems" xlink:title="csan_CashAndCashEquivalents1LineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CashAndCashEquivalentsTable" xlink:label="csan_CashAndCashEquivalentsTable" xlink:title="csan_CashAndCashEquivalentsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_CashAndCashEquivalents1LineItems" xlink:to="csan_CashAndCashEquivalentsTable" xlink:title="Definition : csan_CashAndCashEquivalents1LineItems to csan_CashAndCashEquivalentsTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsAxis" xlink:label="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:title="ifrs-full_ClassesOfFinancialAssetsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_CashAndCashEquivalentsTable" xlink:to="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:title="Definition : csan_CashAndCashEquivalentsTable to ifrs-full_ClassesOfFinancialAssetsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsMember" xlink:label="ifrs-full_FinancialAssetsMember" xlink:title="ifrs-full_FinancialAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialAssetsAxis to ifrs-full_FinancialAssetsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BankCertificateOfDepositsMember" xlink:label="csan_BankCertificateOfDepositsMember" xlink:title="csan_BankCertificateOfDepositsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="csan_BankCertificateOfDepositsMember" xlink:title="Definition : ifrs-full_FinancialAssetsMember to csan_BankCertificateOfDepositsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherBankInvestmentsMember" xlink:label="csan_OtherBankInvestmentsMember" xlink:title="csan_OtherBankInvestmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="csan_OtherBankInvestmentsMember" xlink:title="Definition : ifrs-full_FinancialAssetsMember to csan_OtherBankInvestmentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RepurchaseAgreements1Member" xlink:label="csan_RepurchaseAgreements1Member" xlink:title="csan_RepurchaseAgreements1Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="csan_RepurchaseAgreements1Member" xlink:title="Definition : ifrs-full_FinancialAssetsMember to csan_RepurchaseAgreements1Member" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsMember" xlink:label="ifrs-full_FinancialAssetsMember_1" xlink:title="ifrs-full_FinancialAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsMember_1" xlink:title="Definition : ifrs-full_ClassesOfFinancialAssetsAxis to ifrs-full_FinancialAssetsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_UnconsolidatedStructuredEntitiesAxis" xlink:label="ifrs-full_UnconsolidatedStructuredEntitiesAxis" xlink:title="ifrs-full_UnconsolidatedStructuredEntitiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_CashAndCashEquivalentsTable" xlink:to="ifrs-full_UnconsolidatedStructuredEntitiesAxis" xlink:title="Definition : csan_CashAndCashEquivalentsTable to ifrs-full_UnconsolidatedStructuredEntitiesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForUnconsolidatedStructuredEntitiesMember" xlink:label="ifrs-full_EntitysTotalForUnconsolidatedStructuredEntitiesMember" xlink:title="ifrs-full_EntitysTotalForUnconsolidatedStructuredEntitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_UnconsolidatedStructuredEntitiesAxis" xlink:to="ifrs-full_EntitysTotalForUnconsolidatedStructuredEntitiesMember" xlink:title="Definition : ifrs-full_UnconsolidatedStructuredEntitiesAxis to ifrs-full_EntitysTotalForUnconsolidatedStructuredEntitiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BankInvestmentsMember" xlink:label="csan_BankInvestmentsMember" xlink:title="csan_BankInvestmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForUnconsolidatedStructuredEntitiesMember" xlink:to="csan_BankInvestmentsMember" xlink:title="Definition : ifrs-full_EntitysTotalForUnconsolidatedStructuredEntitiesMember to csan_BankInvestmentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InvestmentFundsMember" xlink:label="ifrs-full_InvestmentFundsMember" xlink:title="ifrs-full_InvestmentFundsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForUnconsolidatedStructuredEntitiesMember" xlink:to="ifrs-full_InvestmentFundsMember" xlink:title="Definition : ifrs-full_EntitysTotalForUnconsolidatedStructuredEntitiesMember to ifrs-full_InvestmentFundsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForUnconsolidatedStructuredEntitiesMember" xlink:label="ifrs-full_EntitysTotalForUnconsolidatedStructuredEntitiesMember_1" xlink:title="ifrs-full_EntitysTotalForUnconsolidatedStructuredEntitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_UnconsolidatedStructuredEntitiesAxis" xlink:to="ifrs-full_EntitysTotalForUnconsolidatedStructuredEntitiesMember_1" xlink:title="Definition : ifrs-full_UnconsolidatedStructuredEntitiesAxis to ifrs-full_EntitysTotalForUnconsolidatedStructuredEntitiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ShorttermInvestmentsClassifiedAsCashEquivalents" xlink:label="ifrs-full_ShorttermInvestmentsClassifiedAsCashEquivalents" xlink:title="ifrs-full_ShorttermInvestmentsClassifiedAsCashEquivalents"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_CashAndCashEquivalents1LineItems" xlink:to="ifrs-full_ShorttermInvestmentsClassifiedAsCashEquivalents" xlink:title="Definition : csan_CashAndCashEquivalents1LineItems to ifrs-full_ShorttermInvestmentsClassifiedAsCashEquivalents" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesAdditionalInformationDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfFinancialResourcesLineItems" xlink:label="csan_DisclosureOfFinancialResourcesLineItems" xlink:title="csan_DisclosureOfFinancialResourcesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AmountOfNaturalGasAnnual" xlink:label="csan_AmountOfNaturalGasAnnual" xlink:title="csan_AmountOfNaturalGasAnnual"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfFinancialResourcesLineItems" xlink:to="csan_AmountOfNaturalGasAnnual" xlink:title="Definition : csan_DisclosureOfFinancialResourcesLineItems to csan_AmountOfNaturalGasAnnual" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AmountOfNaturalGasEquivalentPerDay" xlink:label="csan_AmountOfNaturalGasEquivalentPerDay" xlink:title="csan_AmountOfNaturalGasEquivalentPerDay"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfFinancialResourcesLineItems" xlink:to="csan_AmountOfNaturalGasEquivalentPerDay" xlink:title="Definition : csan_DisclosureOfFinancialResourcesLineItems to csan_AmountOfNaturalGasEquivalentPerDay" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AmountOfNaturalGasMonthly" xlink:label="csan_AmountOfNaturalGasMonthly" xlink:title="csan_AmountOfNaturalGasMonthly"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfFinancialResourcesLineItems" xlink:to="csan_AmountOfNaturalGasMonthly" xlink:title="Definition : csan_DisclosureOfFinancialResourcesLineItems to csan_AmountOfNaturalGasMonthly" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AverageBorrowingRate" xlink:label="csan_AverageBorrowingRate" xlink:title="csan_AverageBorrowingRate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfFinancialResourcesLineItems" xlink:to="csan_AverageBorrowingRate" xlink:title="Definition : csan_DisclosureOfFinancialResourcesLineItems to csan_AverageBorrowingRate" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AverageMaturityOfGovernmentBonds" xlink:label="csan_AverageMaturityOfGovernmentBonds" xlink:title="csan_AverageMaturityOfGovernmentBonds"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfFinancialResourcesLineItems" xlink:to="csan_AverageMaturityOfGovernmentBonds" xlink:title="Definition : csan_DisclosureOfFinancialResourcesLineItems to csan_AverageMaturityOfGovernmentBonds" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BalanceOfBankGuaranteesContracted" xlink:label="csan_BalanceOfBankGuaranteesContracted" xlink:title="csan_BalanceOfBankGuaranteesContracted"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfFinancialResourcesLineItems" xlink:to="csan_BalanceOfBankGuaranteesContracted" xlink:title="Definition : csan_DisclosureOfFinancialResourcesLineItems to csan_BalanceOfBankGuaranteesContracted" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ContractExpiryDate" xlink:label="csan_ContractExpiryDate" xlink:title="csan_ContractExpiryDate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfFinancialResourcesLineItems" xlink:to="csan_ContractExpiryDate" xlink:title="Definition : csan_DisclosureOfFinancialResourcesLineItems to csan_ContractExpiryDate" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfFinancialResourcesTable" xlink:label="csan_DisclosureOfFinancialResourcesTable" xlink:title="csan_DisclosureOfFinancialResourcesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfFinancialResourcesLineItems" xlink:to="csan_DisclosureOfFinancialResourcesTable" xlink:title="Definition : csan_DisclosureOfFinancialResourcesLineItems to csan_DisclosureOfFinancialResourcesTable" xlink:type="arc" use="optional" order="7" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="ifrs-full_BorrowingsByNameAxis" xlink:title="ifrs-full_BorrowingsByNameAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfFinancialResourcesTable" xlink:to="ifrs-full_BorrowingsByNameAxis" xlink:title="Definition : csan_DisclosureOfFinancialResourcesTable to ifrs-full_BorrowingsByNameAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember" xlink:title="ifrs-full_BorrowingsByNameMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember" xlink:title="Definition : ifrs-full_BorrowingsByNameAxis to ifrs-full_BorrowingsByNameMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BNDESMember" xlink:label="csan_BNDESMember" xlink:title="csan_BNDESMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_BNDESMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_BNDESMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ThreeBrazilianFinancialInstitutionsMember" xlink:label="csan_ThreeBrazilianFinancialInstitutionsMember" xlink:title="csan_ThreeBrazilianFinancialInstitutionsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_ThreeBrazilianFinancialInstitutionsMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_ThreeBrazilianFinancialInstitutionsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember_1" xlink:title="ifrs-full_BorrowingsByNameMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember_1" xlink:title="Definition : ifrs-full_BorrowingsByNameAxis to ifrs-full_BorrowingsByNameMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:label="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:title="ifrs-full_CategoriesOfFinancialAssetsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfFinancialResourcesTable" xlink:to="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:title="Definition : csan_DisclosureOfFinancialResourcesTable to ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsCategoryMember" xlink:label="ifrs-full_FinancialAssetsCategoryMember" xlink:title="ifrs-full_FinancialAssetsCategoryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsCategoryMember" xlink:title="Definition : ifrs-full_CategoriesOfFinancialAssetsAxis to ifrs-full_FinancialAssetsCategoryMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember" xlink:label="ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember" xlink:title="ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsCategoryMember" xlink:to="ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember" xlink:title="Definition : ifrs-full_FinancialAssetsCategoryMember to ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" xlink:label="ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" xlink:title="ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsCategoryMember" xlink:to="ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" xlink:title="Definition : ifrs-full_FinancialAssetsCategoryMember to ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsCategoryMember" xlink:label="ifrs-full_FinancialAssetsCategoryMember_1" xlink:title="ifrs-full_FinancialAssetsCategoryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsCategoryMember_1" xlink:title="Definition : ifrs-full_CategoriesOfFinancialAssetsAxis to ifrs-full_FinancialAssetsCategoryMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfFinancialResourcesTable" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:title="Definition : csan_DisclosureOfFinancialResourcesTable to ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsAxis to ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MarketableSecuritiesMember" xlink:label="csan_MarketableSecuritiesMember" xlink:title="csan_MarketableSecuritiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_MarketableSecuritiesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_MarketableSecuritiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RestrictedCashMember" xlink:label="csan_RestrictedCashMember" xlink:title="csan_RestrictedCashMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_RestrictedCashMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_RestrictedCashMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember_1" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember_1" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsAxis to ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesAxis" xlink:label="ifrs-full_CounterpartiesAxis" xlink:title="ifrs-full_CounterpartiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfFinancialResourcesTable" xlink:to="ifrs-full_CounterpartiesAxis" xlink:title="Definition : csan_DisclosureOfFinancialResourcesTable to ifrs-full_CounterpartiesAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember" xlink:title="ifrs-full_CounterpartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember" xlink:title="Definition : ifrs-full_CounterpartiesAxis to ifrs-full_CounterpartiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BraziliansourcedNaturalGasMember" xlink:label="csan_BraziliansourcedNaturalGasMember" xlink:title="csan_BraziliansourcedNaturalGasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="csan_BraziliansourcedNaturalGasMember" xlink:title="Definition : ifrs-full_CounterpartiesMember to csan_BraziliansourcedNaturalGasMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember_1" xlink:title="ifrs-full_CounterpartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember_1" xlink:title="Definition : ifrs-full_CounterpartiesAxis to ifrs-full_CounterpartiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FinancialCommitmentsAxis" xlink:label="csan_FinancialCommitmentsAxis" xlink:title="csan_FinancialCommitmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfFinancialResourcesTable" xlink:to="csan_FinancialCommitmentsAxis" xlink:title="Definition : csan_DisclosureOfFinancialResourcesTable to csan_FinancialCommitmentsAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FinancialCommitmentsDomain" xlink:label="csan_FinancialCommitmentsDomain" xlink:title="csan_FinancialCommitmentsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_FinancialCommitmentsAxis" xlink:to="csan_FinancialCommitmentsDomain" xlink:title="Definition : csan_FinancialCommitmentsAxis to csan_FinancialCommitmentsDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FEDFUNDSMember" xlink:label="csan_FEDFUNDSMember" xlink:title="csan_FEDFUNDSMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_FinancialCommitmentsDomain" xlink:to="csan_FEDFUNDSMember" xlink:title="Definition : csan_FinancialCommitmentsDomain to csan_FEDFUNDSMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_InterBankDepositCertificateMember" xlink:label="csan_InterBankDepositCertificateMember" xlink:title="csan_InterBankDepositCertificateMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_FinancialCommitmentsDomain" xlink:to="csan_InterBankDepositCertificateMember" xlink:title="Definition : csan_FinancialCommitmentsDomain to csan_InterBankDepositCertificateMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FinancialCommitmentsDomain" xlink:label="csan_FinancialCommitmentsDomain_1" xlink:title="csan_FinancialCommitmentsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_FinancialCommitmentsAxis" xlink:to="csan_FinancialCommitmentsDomain_1" xlink:title="Definition : csan_FinancialCommitmentsAxis to csan_FinancialCommitmentsDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentsAxis" xlink:label="ifrs-full_HedgingInstrumentsAxis" xlink:title="ifrs-full_HedgingInstrumentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfFinancialResourcesTable" xlink:to="ifrs-full_HedgingInstrumentsAxis" xlink:title="Definition : csan_DisclosureOfFinancialResourcesTable to ifrs-full_HedgingInstrumentsAxis" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentsMember" xlink:label="ifrs-full_HedgingInstrumentsMember" xlink:title="ifrs-full_HedgingInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_HedgingInstrumentsAxis" xlink:to="ifrs-full_HedgingInstrumentsMember" xlink:title="Definition : ifrs-full_HedgingInstrumentsAxis to ifrs-full_HedgingInstrumentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentsMember" xlink:label="ifrs-full_HedgingInstrumentsMember_1" xlink:title="ifrs-full_HedgingInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_HedgingInstrumentsAxis" xlink:to="ifrs-full_HedgingInstrumentsMember_1" xlink:title="Definition : ifrs-full_HedgingInstrumentsAxis to ifrs-full_HedgingInstrumentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MaturityAxis" xlink:label="ifrs-full_MaturityAxis" xlink:title="ifrs-full_MaturityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfFinancialResourcesTable" xlink:to="ifrs-full_MaturityAxis" xlink:title="Definition : csan_DisclosureOfFinancialResourcesTable to ifrs-full_MaturityAxis" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember" xlink:title="ifrs-full_AggregatedTimeBandsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember" xlink:title="Definition : ifrs-full_MaturityAxis to ifrs-full_AggregatedTimeBandsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DecemberTwoThousandTwentyOneMember" xlink:label="csan_DecemberTwoThousandTwentyOneMember" xlink:title="csan_DecemberTwoThousandTwentyOneMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_DecemberTwoThousandTwentyOneMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_DecemberTwoThousandTwentyOneMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_JuneTwoThousandTwentyOneMember" xlink:label="csan_JuneTwoThousandTwentyOneMember" xlink:title="csan_JuneTwoThousandTwentyOneMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_JuneTwoThousandTwentyOneMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_JuneTwoThousandTwentyOneMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember_1" xlink:title="ifrs-full_AggregatedTimeBandsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember_1" xlink:title="Definition : ifrs-full_MaturityAxis to ifrs-full_AggregatedTimeBandsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" xlink:title="ifrs-full_RangeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfFinancialResourcesTable" xlink:to="ifrs-full_RangeAxis" xlink:title="Definition : csan_DisclosureOfFinancialResourcesTable to ifrs-full_RangeAxis" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BottomOfRangeMember" xlink:label="ifrs-full_BottomOfRangeMember" xlink:title="ifrs-full_BottomOfRangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_BottomOfRangeMember" xlink:title="Definition : ifrs-full_RangesMember to ifrs-full_BottomOfRangeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="ifrs-full_TopOfRangeMember" xlink:title="ifrs-full_TopOfRangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_TopOfRangeMember" xlink:title="Definition : ifrs-full_RangesMember to ifrs-full_TopOfRangeMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember_1" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember_1" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfFinancialResourcesTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : csan_DisclosureOfFinancialResourcesTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasMember" xlink:label="csan_ComgasMember" xlink:title="csan_ComgasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ComgasMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ComgasMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLogisticaSAMember" xlink:label="csan_CosanLogisticaSAMember" xlink:title="csan_CosanLogisticaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanLogisticaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanLogisticaSAMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoSAMember" xlink:label="csan_RumoSAMember" xlink:title="csan_RumoSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoSAMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfInterestRatesAxis" xlink:label="ifrs-full_TypesOfInterestRatesAxis" xlink:title="ifrs-full_TypesOfInterestRatesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfFinancialResourcesTable" xlink:to="ifrs-full_TypesOfInterestRatesAxis" xlink:title="Definition : csan_DisclosureOfFinancialResourcesTable to ifrs-full_TypesOfInterestRatesAxis" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateTypesMember" xlink:label="ifrs-full_InterestRateTypesMember" xlink:title="ifrs-full_InterestRateTypesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfInterestRatesAxis" xlink:to="ifrs-full_InterestRateTypesMember" xlink:title="Definition : ifrs-full_TypesOfInterestRatesAxis to ifrs-full_InterestRateTypesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CDIIndexMember" xlink:label="csan_CDIIndexMember" xlink:title="csan_CDIIndexMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_CDIIndexMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_CDIIndexMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TJLPIndexMember" xlink:label="csan_TJLPIndexMember" xlink:title="csan_TJLPIndexMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_TJLPIndexMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_TJLPIndexMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateTypesMember" xlink:label="ifrs-full_InterestRateTypesMember_1" xlink:title="ifrs-full_InterestRateTypesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfInterestRatesAxis" xlink:to="ifrs-full_InterestRateTypesMember_1" xlink:title="Definition : ifrs-full_TypesOfInterestRatesAxis to ifrs-full_InterestRateTypesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_UnconsolidatedSubsidiariesAxis" xlink:label="ifrs-full_UnconsolidatedSubsidiariesAxis" xlink:title="ifrs-full_UnconsolidatedSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfFinancialResourcesTable" xlink:to="ifrs-full_UnconsolidatedSubsidiariesAxis" xlink:title="Definition : csan_DisclosureOfFinancialResourcesTable to ifrs-full_UnconsolidatedSubsidiariesAxis" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForUnconsolidatedSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForUnconsolidatedSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForUnconsolidatedSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_UnconsolidatedSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForUnconsolidatedSubsidiariesMember" xlink:title="Definition : ifrs-full_UnconsolidatedSubsidiariesAxis to ifrs-full_EntitysTotalForUnconsolidatedSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PetrobrasMember" xlink:label="csan_PetrobrasMember" xlink:title="csan_PetrobrasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForUnconsolidatedSubsidiariesMember" xlink:to="csan_PetrobrasMember" xlink:title="Definition : ifrs-full_EntitysTotalForUnconsolidatedSubsidiariesMember to csan_PetrobrasMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForUnconsolidatedSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForUnconsolidatedSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForUnconsolidatedSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_UnconsolidatedSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForUnconsolidatedSubsidiariesMember_1" xlink:title="Definition : ifrs-full_UnconsolidatedSubsidiariesAxis to ifrs-full_EntitysTotalForUnconsolidatedSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GuaranteeFeeRate" xlink:label="csan_GuaranteeFeeRate" xlink:title="csan_GuaranteeFeeRate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfFinancialResourcesLineItems" xlink:to="csan_GuaranteeFeeRate" xlink:title="Definition : csan_DisclosureOfFinancialResourcesLineItems to csan_GuaranteeFeeRate" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_HedgedRiskPositonPercentage" xlink:label="csan_HedgedRiskPositonPercentage" xlink:title="csan_HedgedRiskPositonPercentage"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfFinancialResourcesLineItems" xlink:to="csan_HedgedRiskPositonPercentage" xlink:title="Definition : csan_DisclosureOfFinancialResourcesLineItems to csan_HedgedRiskPositonPercentage" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LeaseMaturityTerm1" xlink:label="csan_LeaseMaturityTerm1" xlink:title="csan_LeaseMaturityTerm1"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfFinancialResourcesLineItems" xlink:to="csan_LeaseMaturityTerm1" xlink:title="Definition : csan_DisclosureOfFinancialResourcesLineItems to csan_LeaseMaturityTerm1" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LineOfCreditFacilityRemainingBorrowingCapacity1" xlink:label="csan_LineOfCreditFacilityRemainingBorrowingCapacity1" xlink:title="csan_LineOfCreditFacilityRemainingBorrowingCapacity1"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfFinancialResourcesLineItems" xlink:to="csan_LineOfCreditFacilityRemainingBorrowingCapacity1" xlink:title="Definition : csan_DisclosureOfFinancialResourcesLineItems to csan_LineOfCreditFacilityRemainingBorrowingCapacity1" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NonVotingPreferredSharesPaidInAmount" xlink:label="csan_NonVotingPreferredSharesPaidInAmount" xlink:title="csan_NonVotingPreferredSharesPaidInAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfFinancialResourcesLineItems" xlink:to="csan_NonVotingPreferredSharesPaidInAmount" xlink:title="Definition : csan_DisclosureOfFinancialResourcesLineItems to csan_NonVotingPreferredSharesPaidInAmount" xlink:type="arc" use="optional" order="12" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfOffshoreFinancialInvestmentsRemuneration" xlink:label="csan_PercentageOfOffshoreFinancialInvestmentsRemuneration" xlink:title="csan_PercentageOfOffshoreFinancialInvestmentsRemuneration"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfFinancialResourcesLineItems" xlink:to="csan_PercentageOfOffshoreFinancialInvestmentsRemuneration" xlink:title="Definition : csan_DisclosureOfFinancialResourcesLineItems to csan_PercentageOfOffshoreFinancialInvestmentsRemuneration" xlink:type="arc" use="optional" order="13" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfOnshoreFinancialInvestmentsRemuneration" xlink:label="csan_PercentageOfOnshoreFinancialInvestmentsRemuneration" xlink:title="csan_PercentageOfOnshoreFinancialInvestmentsRemuneration"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfFinancialResourcesLineItems" xlink:to="csan_PercentageOfOnshoreFinancialInvestmentsRemuneration" xlink:title="Definition : csan_DisclosureOfFinancialResourcesLineItems to csan_PercentageOfOnshoreFinancialInvestmentsRemuneration" xlink:type="arc" use="optional" order="14" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_WeightedAverageLesseesIncrementalBorrowingRateAppliedToLeaseLiabilitiesRecognisedAtDateOfInitialApplicationOfIFRS16" xlink:label="ifrs-full_WeightedAverageLesseesIncrementalBorrowingRateAppliedToLeaseLiabilitiesRecognisedAtDateOfInitialApplicationOfIFRS16" xlink:title="ifrs-full_WeightedAverageLesseesIncrementalBorrowingRateAppliedToLeaseLiabilitiesRecognisedAtDateOfInitialApplicationOfIFRS16"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfFinancialResourcesLineItems" xlink:to="ifrs-full_WeightedAverageLesseesIncrementalBorrowingRateAppliedToLeaseLiabilitiesRecognisedAtDateOfInitialApplicationOfIFRS16" xlink:title="Definition : csan_DisclosureOfFinancialResourcesLineItems to ifrs-full_WeightedAverageLesseesIncrementalBorrowingRateAppliedToLeaseLiabilitiesRecognisedAtDateOfInitialApplicationOfIFRS16" xlink:type="arc" use="optional" order="15" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfMarketableSecuritiesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfMarketableSecuritiesLineItems" xlink:label="csan_DisclosureOfMarketableSecuritiesLineItems" xlink:title="csan_DisclosureOfMarketableSecuritiesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MarketableSecuritiesTable" xlink:label="csan_MarketableSecuritiesTable" xlink:title="csan_MarketableSecuritiesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfMarketableSecuritiesLineItems" xlink:to="csan_MarketableSecuritiesTable" xlink:title="Definition : csan_DisclosureOfMarketableSecuritiesLineItems to csan_MarketableSecuritiesTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsAxis" xlink:label="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:title="ifrs-full_ClassesOfFinancialAssetsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_MarketableSecuritiesTable" xlink:to="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:title="Definition : csan_MarketableSecuritiesTable to ifrs-full_ClassesOfFinancialAssetsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsMember" xlink:label="ifrs-full_FinancialAssetsMember" xlink:title="ifrs-full_FinancialAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialAssetsAxis to ifrs-full_FinancialAssetsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BankCertificateOfDepositsMember" xlink:label="csan_BankCertificateOfDepositsMember" xlink:title="csan_BankCertificateOfDepositsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="csan_BankCertificateOfDepositsMember" xlink:title="Definition : ifrs-full_FinancialAssetsMember to csan_BankCertificateOfDepositsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GovernmentSecuritiesMember" xlink:label="csan_GovernmentSecuritiesMember" xlink:title="csan_GovernmentSecuritiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="csan_GovernmentSecuritiesMember" xlink:title="Definition : ifrs-full_FinancialAssetsMember to csan_GovernmentSecuritiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RepurchaseAgreementsMember" xlink:label="csan_RepurchaseAgreementsMember" xlink:title="csan_RepurchaseAgreementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="csan_RepurchaseAgreementsMember" xlink:title="Definition : ifrs-full_FinancialAssetsMember to csan_RepurchaseAgreementsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsMember" xlink:label="ifrs-full_FinancialAssetsMember_1" xlink:title="ifrs-full_FinancialAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsMember_1" xlink:title="Definition : ifrs-full_ClassesOfFinancialAssetsAxis to ifrs-full_FinancialAssetsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ShorttermDepositsNotClassifiedAsCashEquivalents" xlink:label="ifrs-full_ShorttermDepositsNotClassifiedAsCashEquivalents" xlink:title="ifrs-full_ShorttermDepositsNotClassifiedAsCashEquivalents"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfMarketableSecuritiesLineItems" xlink:to="ifrs-full_ShorttermDepositsNotClassifiedAsCashEquivalents" xlink:title="Definition : csan_DisclosureOfMarketableSecuritiesLineItems to ifrs-full_ShorttermDepositsNotClassifiedAsCashEquivalents" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfRestrictedCashDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfRestrictedCashAndCashEquivalentsLineItems" xlink:label="csan_DisclosureOfRestrictedCashAndCashEquivalentsLineItems" xlink:title="csan_DisclosureOfRestrictedCashAndCashEquivalentsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfRestrictedCashAndCashEquivalentsTable" xlink:label="csan_DisclosureOfRestrictedCashAndCashEquivalentsTable" xlink:title="csan_DisclosureOfRestrictedCashAndCashEquivalentsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfRestrictedCashAndCashEquivalentsLineItems" xlink:to="csan_DisclosureOfRestrictedCashAndCashEquivalentsTable" xlink:title="Definition : csan_DisclosureOfRestrictedCashAndCashEquivalentsLineItems to csan_DisclosureOfRestrictedCashAndCashEquivalentsTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsAxis" xlink:label="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:title="ifrs-full_ClassesOfFinancialAssetsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfRestrictedCashAndCashEquivalentsTable" xlink:to="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:title="Definition : csan_DisclosureOfRestrictedCashAndCashEquivalentsTable to ifrs-full_ClassesOfFinancialAssetsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsMember" xlink:label="ifrs-full_FinancialAssetsMember" xlink:title="ifrs-full_FinancialAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialAssetsAxis to ifrs-full_FinancialAssetsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_InvestmentsLinkedToLoansMember" xlink:label="csan_InvestmentsLinkedToLoansMember" xlink:title="csan_InvestmentsLinkedToLoansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="csan_InvestmentsLinkedToLoansMember" xlink:title="Definition : ifrs-full_FinancialAssetsMember to csan_InvestmentsLinkedToLoansMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SecuritiesPledgedAsCollateral1Member" xlink:label="csan_SecuritiesPledgedAsCollateral1Member" xlink:title="csan_SecuritiesPledgedAsCollateral1Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="csan_SecuritiesPledgedAsCollateral1Member" xlink:title="Definition : ifrs-full_FinancialAssetsMember to csan_SecuritiesPledgedAsCollateral1Member" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsMember" xlink:label="ifrs-full_FinancialAssetsMember_1" xlink:title="ifrs-full_FinancialAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsMember_1" xlink:title="Definition : ifrs-full_ClassesOfFinancialAssetsAxis to ifrs-full_FinancialAssetsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RestrictedCashAndCashEquivalents" xlink:label="ifrs-full_RestrictedCashAndCashEquivalents" xlink:title="ifrs-full_RestrictedCashAndCashEquivalents"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfRestrictedCashAndCashEquivalentsLineItems" xlink:to="ifrs-full_RestrictedCashAndCashEquivalents" xlink:title="Definition : csan_DisclosureOfRestrictedCashAndCashEquivalentsLineItems to ifrs-full_RestrictedCashAndCashEquivalents" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfTradeReceivablesParentheticalDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfTradeReceivablesLineItems" xlink:label="csan_DisclosureOfTradeReceivablesLineItems" xlink:title="csan_DisclosureOfTradeReceivablesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfTradeReceivablesTable" xlink:label="csan_DisclosureOfTradeReceivablesTable" xlink:title="csan_DisclosureOfTradeReceivablesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfTradeReceivablesLineItems" xlink:to="csan_DisclosureOfTradeReceivablesTable" xlink:title="Definition : csan_DisclosureOfTradeReceivablesLineItems to csan_DisclosureOfTradeReceivablesTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:label="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:title="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfTradeReceivablesTable" xlink:to="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:title="Definition : csan_DisclosureOfTradeReceivablesTable to ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember" xlink:title="ifrs-full_CarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember" xlink:title="Definition : ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis to ifrs-full_CarryingAmountMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AccumulatedImpairmentMember" xlink:label="ifrs-full_AccumulatedImpairmentMember" xlink:title="ifrs-full_AccumulatedImpairmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_AccumulatedImpairmentMember" xlink:title="Definition : ifrs-full_CarryingAmountMember to ifrs-full_AccumulatedImpairmentMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfTradeReceivablesTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : csan_DisclosureOfTradeReceivablesTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasMember" xlink:label="csan_ComgasMember" xlink:title="csan_ComgasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ComgasMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ComgasMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ReversalOfImpairmentLossRecognisedInProfitOrLossTradeReceivables" xlink:label="ifrs-full_ReversalOfImpairmentLossRecognisedInProfitOrLossTradeReceivables" xlink:title="ifrs-full_ReversalOfImpairmentLossRecognisedInProfitOrLossTradeReceivables"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfTradeReceivablesLineItems" xlink:to="ifrs-full_ReversalOfImpairmentLossRecognisedInProfitOrLossTradeReceivables" xlink:title="Definition : csan_DisclosureOfTradeReceivablesLineItems to ifrs-full_ReversalOfImpairmentLossRecognisedInProfitOrLossTradeReceivables" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfAgeingOfTradeReceivablesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfTradeReceivablesLineItems" xlink:label="csan_DisclosureOfTradeReceivablesLineItems" xlink:title="csan_DisclosureOfTradeReceivablesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfTradeReceivablesTable" xlink:label="csan_DisclosureOfTradeReceivablesTable" xlink:title="csan_DisclosureOfTradeReceivablesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfTradeReceivablesLineItems" xlink:to="csan_DisclosureOfTradeReceivablesTable" xlink:title="Definition : csan_DisclosureOfTradeReceivablesLineItems to csan_DisclosureOfTradeReceivablesTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:label="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:title="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfTradeReceivablesTable" xlink:to="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:title="Definition : csan_DisclosureOfTradeReceivablesTable to ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember" xlink:title="ifrs-full_CarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember" xlink:title="Definition : ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis to ifrs-full_CarryingAmountMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AccumulatedImpairmentMember" xlink:label="ifrs-full_AccumulatedImpairmentMember" xlink:title="ifrs-full_AccumulatedImpairmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_AccumulatedImpairmentMember" xlink:title="Definition : ifrs-full_CarryingAmountMember to ifrs-full_AccumulatedImpairmentMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember_1" xlink:title="ifrs-full_CarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember_1" xlink:title="Definition : ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis to ifrs-full_CarryingAmountMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MaturityAxis" xlink:label="ifrs-full_MaturityAxis" xlink:title="ifrs-full_MaturityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfTradeReceivablesTable" xlink:to="ifrs-full_MaturityAxis" xlink:title="Definition : csan_DisclosureOfTradeReceivablesTable to ifrs-full_MaturityAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember" xlink:title="ifrs-full_AggregatedTimeBandsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember" xlink:title="Definition : ifrs-full_MaturityAxis to ifrs-full_AggregatedTimeBandsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MoreThanNinetyDaysMember" xlink:label="csan_MoreThanNinetyDaysMember" xlink:title="csan_MoreThanNinetyDaysMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_MoreThanNinetyDaysMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_MoreThanNinetyDaysMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NotDueMember" xlink:label="csan_NotDueMember" xlink:title="csan_NotDueMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_NotDueMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_NotDueMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OverdueOneToThirtyDaysMember" xlink:label="csan_OverdueOneToThirtyDaysMember" xlink:title="csan_OverdueOneToThirtyDaysMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_OverdueOneToThirtyDaysMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_OverdueOneToThirtyDaysMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OverdueSixtyOneToNinetyDaysMember" xlink:label="csan_OverdueSixtyOneToNinetyDaysMember" xlink:title="csan_OverdueSixtyOneToNinetyDaysMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_OverdueSixtyOneToNinetyDaysMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_OverdueSixtyOneToNinetyDaysMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OverdueThirtyOneToSixtyDaysMember" xlink:label="csan_OverdueThirtyOneToSixtyDaysMember" xlink:title="csan_OverdueThirtyOneToSixtyDaysMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_OverdueThirtyOneToSixtyDaysMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_OverdueThirtyOneToSixtyDaysMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember_1" xlink:title="ifrs-full_AggregatedTimeBandsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember_1" xlink:title="Definition : ifrs-full_MaturityAxis to ifrs-full_AggregatedTimeBandsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TradeReceivables" xlink:label="ifrs-full_TradeReceivables" xlink:title="ifrs-full_TradeReceivables"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfTradeReceivablesLineItems" xlink:to="ifrs-full_TradeReceivables" xlink:title="Definition : csan_DisclosureOfTradeReceivablesLineItems to ifrs-full_TradeReceivables" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfReceivablesFromAndPayablesToRelatedPartiesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:label="csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:title="csan_DisclosureOfReceivablesAndPayablesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfReceivablesAndPayablesTable" xlink:label="csan_DisclosureOfReceivablesAndPayablesTable" xlink:title="csan_DisclosureOfReceivablesAndPayablesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:to="csan_DisclosureOfReceivablesAndPayablesTable" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesLineItems to csan_DisclosureOfReceivablesAndPayablesTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="ifrs-full_CategoriesOfRelatedPartiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfReceivablesAndPayablesTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesTable to ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AguassantaParticipacoesSAMember" xlink:label="csan_AguassantaParticipacoesSAMember" xlink:title="csan_AguassantaParticipacoesSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_AguassantaParticipacoesSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_AguassantaParticipacoesSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_JanusBrasilParticipacoesSAMember" xlink:label="csan_JanusBrasilParticipacoesSAMember" xlink:title="csan_JanusBrasilParticipacoesSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_JanusBrasilParticipacoesSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_JanusBrasilParticipacoesSAMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherRelatedPartiesMember" xlink:label="ifrs-full_OtherRelatedPartiesMember" xlink:title="ifrs-full_OtherRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="ifrs-full_OtherRelatedPartiesMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to ifrs-full_OtherRelatedPartiesMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenEnergiaMember" xlink:label="csan_RaizenEnergiaMember" xlink:title="csan_RaizenEnergiaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_RaizenEnergiaMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_RaizenEnergiaMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RezendeBarbosaMember" xlink:label="csan_RezendeBarbosaMember" xlink:title="csan_RezendeBarbosaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_RezendeBarbosaMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_RezendeBarbosaMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RadarPropriedadesAgrcolasSaMember" xlink:label="csan_RadarPropriedadesAgrcolasSaMember" xlink:title="csan_RadarPropriedadesAgrcolasSaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_RadarPropriedadesAgrcolasSaMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_RadarPropriedadesAgrcolasSaMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenCombustiveisSAMember" xlink:label="csan_RaizenCombustiveisSAMember" xlink:title="csan_RaizenCombustiveisSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_RaizenCombustiveisSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_RaizenCombustiveisSAMember" xlink:type="arc" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsAxis" xlink:label="ifrs-full_SegmentsAxis" xlink:title="ifrs-full_SegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfReceivablesAndPayablesTable" xlink:to="ifrs-full_SegmentsAxis" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesTable to ifrs-full_SegmentsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember" xlink:title="ifrs-full_SegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember" xlink:title="Definition : ifrs-full_SegmentsAxis to ifrs-full_SegmentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CorporateOperationAgreementsMember" xlink:label="csan_CorporateOperationAgreementsMember" xlink:title="csan_CorporateOperationAgreementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_CorporateOperationAgreementsMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_CorporateOperationAgreementsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FinancialOperationsMember" xlink:label="csan_FinancialOperationsMember" xlink:title="csan_FinancialOperationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_FinancialOperationsMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_FinancialOperationsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PreferredSharesMember" xlink:label="csan_PreferredSharesMember" xlink:title="csan_PreferredSharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_PreferredSharesMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_PreferredSharesMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember_1" xlink:title="ifrs-full_SegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember_1" xlink:title="Definition : ifrs-full_SegmentsAxis to ifrs-full_SegmentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsAxis" xlink:label="ifrs-full_ClassesOfAssetsAxis" xlink:title="ifrs-full_ClassesOfAssetsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfReceivablesAndPayablesTable" xlink:to="ifrs-full_ClassesOfAssetsAxis" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesTable to ifrs-full_ClassesOfAssetsAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember" xlink:title="ifrs-full_ClassesOfAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsAxis to ifrs-full_ClassesOfAssetsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CurrentAssetMember" xlink:label="csan_CurrentAssetMember" xlink:title="csan_CurrentAssetMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="csan_CurrentAssetMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsMember to csan_CurrentAssetMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NoncurrentAssetMember" xlink:label="csan_NoncurrentAssetMember" xlink:title="csan_NoncurrentAssetMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="csan_NoncurrentAssetMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsMember to csan_NoncurrentAssetMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember_1" xlink:title="ifrs-full_ClassesOfAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember_1" xlink:title="Definition : ifrs-full_ClassesOfAssetsAxis to ifrs-full_ClassesOfAssetsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NoncurrentOtherReceivablesDueFromRelatedParties" xlink:label="csan_NoncurrentOtherReceivablesDueFromRelatedParties" xlink:title="csan_NoncurrentOtherReceivablesDueFromRelatedParties"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:to="csan_NoncurrentOtherReceivablesDueFromRelatedParties" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesLineItems to csan_NoncurrentOtherReceivablesDueFromRelatedParties" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentReceivablesDueFromRelatedParties" xlink:label="ifrs-full_NoncurrentReceivablesDueFromRelatedParties" xlink:title="ifrs-full_NoncurrentReceivablesDueFromRelatedParties"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:to="ifrs-full_NoncurrentReceivablesDueFromRelatedParties" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesLineItems to ifrs-full_NoncurrentReceivablesDueFromRelatedParties" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties" xlink:label="ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties" xlink:title="ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:to="ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesLineItems to ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties" xlink:label="ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties" xlink:title="ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:to="ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesLineItems to ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties" xlink:label="ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties" xlink:title="ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:to="ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesLineItems to ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfReceivablesFromAndPayablesToRelatedPartiesParentheticalDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:label="csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:title="csan_DisclosureOfReceivablesAndPayablesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfReceivablesAndPayablesTable" xlink:label="csan_DisclosureOfReceivablesAndPayablesTable" xlink:title="csan_DisclosureOfReceivablesAndPayablesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:to="csan_DisclosureOfReceivablesAndPayablesTable" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesLineItems to csan_DisclosureOfReceivablesAndPayablesTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="ifrs-full_CategoriesOfRelatedPartiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfReceivablesAndPayablesTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesTable to ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AguassantaInvestimentosSAMember" xlink:label="csan_AguassantaInvestimentosSAMember" xlink:title="csan_AguassantaInvestimentosSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_AguassantaInvestimentosSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_AguassantaInvestimentosSAMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:title="dei_LegalEntityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfReceivablesAndPayablesTable" xlink:to="dei_LegalEntityAxis" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesTable to dei_LegalEntityAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAMember" xlink:label="csan_CosanSAMember" xlink:title="csan_CosanSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_CosanSAMember" xlink:title="Definition : dei_EntityDomain to csan_CosanSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLogsticaMember" xlink:label="csan_CosanLogsticaMember" xlink:title="csan_CosanLogsticaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_CosanLogsticaMember" xlink:title="Definition : dei_EntityDomain to csan_CosanLogsticaMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain_1" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain_1" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfReceivablesAndPayablesTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSASubsidiariesMember" xlink:label="csan_CosanSASubsidiariesMember" xlink:title="csan_CosanSASubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanSASubsidiariesMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanSASubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfSharesIssued" xlink:label="ifrs-full_NumberOfSharesIssued" xlink:title="ifrs-full_NumberOfSharesIssued"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:to="ifrs-full_NumberOfSharesIssued" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesLineItems to ifrs-full_NumberOfSharesIssued" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfRelatedPartyTransactionsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:label="csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:title="csan_DisclosureOfReceivablesAndPayablesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfReceivablesAndPayablesTable" xlink:label="csan_DisclosureOfReceivablesAndPayablesTable" xlink:title="csan_DisclosureOfReceivablesAndPayablesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:to="csan_DisclosureOfReceivablesAndPayablesTable" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesLineItems to csan_DisclosureOfReceivablesAndPayablesTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AssetsAndLiabilitiesAxis" xlink:label="ifrs-full_AssetsAndLiabilitiesAxis" xlink:title="ifrs-full_AssetsAndLiabilitiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfReceivablesAndPayablesTable" xlink:to="ifrs-full_AssetsAndLiabilitiesAxis" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesTable to ifrs-full_AssetsAndLiabilitiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AssetsAndLiabilitiesMember" xlink:label="ifrs-full_AssetsAndLiabilitiesMember" xlink:title="ifrs-full_AssetsAndLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_AssetsAndLiabilitiesAxis" xlink:to="ifrs-full_AssetsAndLiabilitiesMember" xlink:title="Definition : ifrs-full_AssetsAndLiabilitiesAxis to ifrs-full_AssetsAndLiabilitiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherMember" xlink:label="csan_OtherMember" xlink:title="csan_OtherMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAndLiabilitiesMember" xlink:to="csan_OtherMember" xlink:title="Definition : ifrs-full_AssetsAndLiabilitiesMember to csan_OtherMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FinancialResultMember" xlink:label="csan_FinancialResultMember" xlink:title="csan_FinancialResultMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAndLiabilitiesMember" xlink:to="csan_FinancialResultMember" xlink:title="Definition : ifrs-full_AssetsAndLiabilitiesMember to csan_FinancialResultMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AssetsAndLiabilitiesMember" xlink:label="ifrs-full_AssetsAndLiabilitiesMember_1" xlink:title="ifrs-full_AssetsAndLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_AssetsAndLiabilitiesAxis" xlink:to="ifrs-full_AssetsAndLiabilitiesMember_1" xlink:title="Definition : ifrs-full_AssetsAndLiabilitiesAxis to ifrs-full_AssetsAndLiabilitiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="ifrs-full_CategoriesOfRelatedPartiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfReceivablesAndPayablesTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesTable to ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenInternationalUniversalCorporationMember" xlink:label="csan_RaizenInternationalUniversalCorporationMember" xlink:title="csan_RaizenInternationalUniversalCorporationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_RaizenInternationalUniversalCorporationMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_RaizenInternationalUniversalCorporationMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherRelatedPartiesMember" xlink:label="ifrs-full_OtherRelatedPartiesMember" xlink:title="ifrs-full_OtherRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="ifrs-full_OtherRelatedPartiesMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to ifrs-full_OtherRelatedPartiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenEnergiaMember" xlink:label="csan_RaizenEnergiaMember" xlink:title="csan_RaizenEnergiaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_RaizenEnergiaMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_RaizenEnergiaMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_UsinaSantaLuizaMember" xlink:label="csan_UsinaSantaLuizaMember" xlink:title="csan_UsinaSantaLuizaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_UsinaSantaLuizaMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_UsinaSantaLuizaMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PurchaseOfGoodsMember" xlink:label="csan_PurchaseOfGoodsMember" xlink:title="csan_PurchaseOfGoodsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_PurchaseOfGoodsMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_PurchaseOfGoodsMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenCombustiveisSAMember" xlink:label="csan_RaizenCombustiveisSAMember" xlink:title="csan_RaizenCombustiveisSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_RaizenCombustiveisSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_RaizenCombustiveisSAMember" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncomeExpenseFromRelatedPartyTransactions" xlink:label="csan_IncomeExpenseFromRelatedPartyTransactions" xlink:title="csan_IncomeExpenseFromRelatedPartyTransactions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:to="csan_IncomeExpenseFromRelatedPartyTransactions" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesLineItems to csan_IncomeExpenseFromRelatedPartyTransactions" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OperatingRevenueFromRelatedPartyTransactions" xlink:label="csan_OperatingRevenueFromRelatedPartyTransactions" xlink:title="csan_OperatingRevenueFromRelatedPartyTransactions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:to="csan_OperatingRevenueFromRelatedPartyTransactions" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesLineItems to csan_OperatingRevenueFromRelatedPartyTransactions" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PurchasesOfGoodsRelatedPartyTransactions" xlink:label="ifrs-full_PurchasesOfGoodsRelatedPartyTransactions" xlink:title="ifrs-full_PurchasesOfGoodsRelatedPartyTransactions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:to="ifrs-full_PurchasesOfGoodsRelatedPartyTransactions" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesLineItems to ifrs-full_PurchasesOfGoodsRelatedPartyTransactions" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FinanceIncomeCostRelatedPartyTransactions" xlink:label="csan_FinanceIncomeCostRelatedPartyTransactions" xlink:title="csan_FinanceIncomeCostRelatedPartyTransactions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:to="csan_FinanceIncomeCostRelatedPartyTransactions" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesLineItems to csan_FinanceIncomeCostRelatedPartyTransactions" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RevenueFromSaleOfGoodsRelatedPartyTransactions" xlink:label="ifrs-full_RevenueFromSaleOfGoodsRelatedPartyTransactions" xlink:title="ifrs-full_RevenueFromSaleOfGoodsRelatedPartyTransactions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfReceivablesAndPayablesLineItems" xlink:to="ifrs-full_RevenueFromSaleOfGoodsRelatedPartyTransactions" xlink:title="Definition : csan_DisclosureOfReceivablesAndPayablesLineItems to ifrs-full_RevenueFromSaleOfGoodsRelatedPartyTransactions" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfLoansBorrowingsAndDebenturesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:title="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsInterestRateBasis" xlink:label="ifrs-full_BorrowingsInterestRateBasis" xlink:title="ifrs-full_BorrowingsInterestRateBasis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_BorrowingsInterestRateBasis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to ifrs-full_BorrowingsInterestRateBasis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsInterestRate" xlink:label="ifrs-full_BorrowingsInterestRate" xlink:title="ifrs-full_BorrowingsInterestRate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_BorrowingsInterestRate" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to ifrs-full_BorrowingsInterestRate" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsMaturity" xlink:label="ifrs-full_BorrowingsMaturity" xlink:title="ifrs-full_BorrowingsMaturity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_BorrowingsMaturity" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to ifrs-full_BorrowingsMaturity" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LoansAndBorrowings" xlink:label="csan_LoansAndBorrowings" xlink:title="csan_LoansAndBorrowings"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="csan_LoansAndBorrowings" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to csan_LoansAndBorrowings" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DescriptionOfBorrowingsObjective" xlink:label="csan_DescriptionOfBorrowingsObjective" xlink:title="csan_DescriptionOfBorrowingsObjective"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="csan_DescriptionOfBorrowingsObjective" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to csan_DescriptionOfBorrowingsObjective" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Borrowings" xlink:label="ifrs-full_Borrowings" xlink:title="ifrs-full_Borrowings"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_Borrowings" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to ifrs-full_Borrowings" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ShorttermBorrowings" xlink:label="ifrs-full_ShorttermBorrowings" xlink:title="ifrs-full_ShorttermBorrowings"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_ShorttermBorrowings" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to ifrs-full_ShorttermBorrowings" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LongtermBorrowings" xlink:label="ifrs-full_LongtermBorrowings" xlink:title="ifrs-full_LongtermBorrowings"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_LongtermBorrowings" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to ifrs-full_LongtermBorrowings" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:title="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:type="arc" use="optional" order="8" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfFinancialLiabilitiesAxis" xlink:label="ifrs-full_TypesOfFinancialLiabilitiesAxis" xlink:title="ifrs-full_TypesOfFinancialLiabilitiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_TypesOfFinancialLiabilitiesAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable to ifrs-full_TypesOfFinancialLiabilitiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialLiabilitiesTypeMember" xlink:label="ifrs-full_FinancialLiabilitiesTypeMember" xlink:title="ifrs-full_FinancialLiabilitiesTypeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_FinancialLiabilitiesTypeMember" xlink:title="Definition : ifrs-full_TypesOfFinancialLiabilitiesAxis to ifrs-full_FinancialLiabilitiesTypeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SecuredBorrowingsMember" xlink:label="csan_SecuredBorrowingsMember" xlink:title="csan_SecuredBorrowingsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialLiabilitiesTypeMember" xlink:to="csan_SecuredBorrowingsMember" xlink:title="Definition : ifrs-full_FinancialLiabilitiesTypeMember to csan_SecuredBorrowingsMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_UnsecuredBorrowingsMember" xlink:label="csan_UnsecuredBorrowingsMember" xlink:title="csan_UnsecuredBorrowingsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialLiabilitiesTypeMember" xlink:to="csan_UnsecuredBorrowingsMember" xlink:title="Definition : ifrs-full_FinancialLiabilitiesTypeMember to csan_UnsecuredBorrowingsMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialLiabilitiesTypeMember" xlink:label="ifrs-full_FinancialLiabilitiesTypeMember_1" xlink:title="ifrs-full_FinancialLiabilitiesTypeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_FinancialLiabilitiesTypeMember_1" xlink:title="Definition : ifrs-full_TypesOfFinancialLiabilitiesAxis to ifrs-full_FinancialLiabilitiesTypeMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="ifrs-full_BorrowingsByNameAxis" xlink:title="ifrs-full_BorrowingsByNameAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_BorrowingsByNameAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable to ifrs-full_BorrowingsByNameAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember" xlink:title="ifrs-full_BorrowingsByNameMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember" xlink:title="Definition : ifrs-full_BorrowingsByNameAxis to ifrs-full_BorrowingsByNameMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BrazilianNationalEconomicandSocialDevelopmentBankMember" xlink:label="csan_BrazilianNationalEconomicandSocialDevelopmentBankMember" xlink:title="csan_BrazilianNationalEconomicandSocialDevelopmentBankMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_BrazilianNationalEconomicandSocialDevelopmentBankMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_BrazilianNationalEconomicandSocialDevelopmentBankMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ExportCreditAgreementMember" xlink:label="csan_ExportCreditAgreementMember" xlink:title="csan_ExportCreditAgreementMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_ExportCreditAgreementMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_ExportCreditAgreementMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EuropeanInvestmentBankMember" xlink:label="csan_EuropeanInvestmentBankMember" xlink:title="csan_EuropeanInvestmentBankMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_EuropeanInvestmentBankMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_EuropeanInvestmentBankMember" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ForeignLoansMember" xlink:label="csan_ForeignLoansMember" xlink:title="csan_ForeignLoansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_ForeignLoansMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_ForeignLoansMember" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ExportCreditNoteMember" xlink:label="csan_ExportCreditNoteMember" xlink:title="csan_ExportCreditNoteMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_ExportCreditNoteMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_ExportCreditNoteMember" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_Resolution4131Member" xlink:label="csan_Resolution4131Member" xlink:title="csan_Resolution4131Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_Resolution4131Member" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_Resolution4131Member" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BankingCreditCertificatesMember" xlink:label="csan_BankingCreditCertificatesMember" xlink:title="csan_BankingCreditCertificatesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_BankingCreditCertificatesMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_BankingCreditCertificatesMember" xlink:type="arc" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PerpetualNotesMember" xlink:label="csan_PerpetualNotesMember" xlink:title="csan_PerpetualNotesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_PerpetualNotesMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_PerpetualNotesMember" xlink:type="arc" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDue2023Member" xlink:label="csan_SeniorNotesDue2023Member" xlink:title="csan_SeniorNotesDue2023Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDue2023Member" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDue2023Member" xlink:type="arc" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDue2024Member" xlink:label="csan_SeniorNotesDue2024Member" xlink:title="csan_SeniorNotesDue2024Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDue2024Member" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDue2024Member" xlink:type="arc" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDue2025Member" xlink:label="csan_SeniorNotesDue2025Member" xlink:title="csan_SeniorNotesDue2025Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDue2025Member" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDue2025Member" xlink:type="arc" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDue2027Member" xlink:label="csan_SeniorNotesDue2027Member" xlink:title="csan_SeniorNotesDue2027Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDue2027Member" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDue2027Member" xlink:type="arc" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDue2028Member" xlink:label="csan_SeniorNotesDue2028Member" xlink:title="csan_SeniorNotesDue2028Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDue2028Member" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDue2028Member" xlink:type="arc" order="12" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PrepaymentMember" xlink:label="csan_PrepaymentMember" xlink:title="csan_PrepaymentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_PrepaymentMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_PrepaymentMember" xlink:type="arc" order="13" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BankOverdraftMember" xlink:label="csan_BankOverdraftMember" xlink:title="csan_BankOverdraftMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_BankOverdraftMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_BankOverdraftMember" xlink:type="arc" order="14" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DebenturesMember" xlink:label="csan_DebenturesMember" xlink:title="csan_DebenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_DebenturesMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_DebenturesMember" xlink:type="arc" order="15" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_WorkingCapitalMember" xlink:label="csan_WorkingCapitalMember" xlink:title="csan_WorkingCapitalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_WorkingCapitalMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_WorkingCapitalMember" xlink:type="arc" order="16" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PromissoryNotesMember" xlink:label="csan_PromissoryNotesMember" xlink:title="csan_PromissoryNotesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_PromissoryNotesMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_PromissoryNotesMember" xlink:type="arc" order="17" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDue2029Member" xlink:label="csan_SeniorNotesDue2029Member" xlink:title="csan_SeniorNotesDue2029Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDue2029Member" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDue2029Member" xlink:type="arc" order="18" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember_1" xlink:title="ifrs-full_BorrowingsByNameMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember_1" xlink:title="Definition : ifrs-full_BorrowingsByNameAxis to ifrs-full_BorrowingsByNameMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfInterestRatesAxis" xlink:label="ifrs-full_TypesOfInterestRatesAxis" xlink:title="ifrs-full_TypesOfInterestRatesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_TypesOfInterestRatesAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable to ifrs-full_TypesOfInterestRatesAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateTypesMember" xlink:label="ifrs-full_InterestRateTypesMember" xlink:title="ifrs-full_InterestRateTypesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfInterestRatesAxis" xlink:to="ifrs-full_InterestRateTypesMember" xlink:title="Definition : ifrs-full_TypesOfInterestRatesAxis to ifrs-full_InterestRateTypesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TJLPIndexMember" xlink:label="csan_TJLPIndexMember" xlink:title="csan_TJLPIndexMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_TJLPIndexMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_TJLPIndexMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_URTJLPIndexMember" xlink:label="csan_URTJLPIndexMember" xlink:title="csan_URTJLPIndexMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_URTJLPIndexMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_URTJLPIndexMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FixedInterestRateMember" xlink:label="ifrs-full_FixedInterestRateMember" xlink:title="ifrs-full_FixedInterestRateMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="ifrs-full_FixedInterestRateMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to ifrs-full_FixedInterestRateMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IndexTJ462Plus1Point80PercentMember" xlink:label="csan_IndexTJ462Plus1Point80PercentMember" xlink:title="csan_IndexTJ462Plus1Point80PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IndexTJ462Plus1Point80PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IndexTJ462Plus1Point80PercentMember" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SelicIndexPlus1Point80PercentMember" xlink:label="csan_SelicIndexPlus1Point80PercentMember" xlink:title="csan_SelicIndexPlus1Point80PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_SelicIndexPlus1Point80PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_SelicIndexPlus1Point80PercentMember" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SelicIndexMember" xlink:label="csan_SelicIndexMember" xlink:title="csan_SelicIndexMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_SelicIndexMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_SelicIndexMember" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SelicIndexPlus1Point96PercentMember" xlink:label="csan_SelicIndexPlus1Point96PercentMember" xlink:title="csan_SelicIndexPlus1Point96PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_SelicIndexPlus1Point96PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_SelicIndexPlus1Point96PercentMember" xlink:type="arc" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IPCAIndexMember" xlink:label="csan_IPCAIndexMember" xlink:title="csan_IPCAIndexMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IPCAIndexMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IPCAIndexMember" xlink:type="arc" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IPCAIndexPlus3Point25PercentMember" xlink:label="csan_IPCAIndexPlus3Point25PercentMember" xlink:title="csan_IPCAIndexPlus3Point25PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IPCAIndexPlus3Point25PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IPCAIndexPlus3Point25PercentMember" xlink:type="arc" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IPCAIndexPlus4Point10PercentMember" xlink:label="csan_IPCAIndexPlus4Point10PercentMember" xlink:title="csan_IPCAIndexPlus4Point10PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IPCAIndexPlus4Point10PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IPCAIndexPlus4Point10PercentMember" xlink:type="arc" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EuriborIndexPlus0Point58PercentMember" xlink:label="csan_EuriborIndexPlus0Point58PercentMember" xlink:title="csan_EuriborIndexPlus0Point58PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_EuriborIndexPlus0Point58PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_EuriborIndexPlus0Point58PercentMember" xlink:type="arc" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_USDollarIndexPlus3Point88PercentMember" xlink:label="csan_USDollarIndexPlus3Point88PercentMember" xlink:title="csan_USDollarIndexPlus3Point88PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_USDollarIndexPlus3Point88PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_USDollarIndexPlus3Point88PercentMember" xlink:type="arc" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_USDollarIndexPlus2Point94PercentMember" xlink:label="csan_USDollarIndexPlus2Point94PercentMember" xlink:title="csan_USDollarIndexPlus2Point94PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_USDollarIndexPlus2Point94PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_USDollarIndexPlus2Point94PercentMember" xlink:type="arc" order="12" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_USDollarIndexPlusLibor6MonthPlus0Point54PercentMember" xlink:label="csan_USDollarIndexPlusLibor6MonthPlus0Point54PercentMember" xlink:title="csan_USDollarIndexPlusLibor6MonthPlus0Point54PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_USDollarIndexPlusLibor6MonthPlus0Point54PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_USDollarIndexPlusLibor6MonthPlus0Point54PercentMember" xlink:type="arc" order="13" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_USDollarIndexPlusLibor6MonthPlus0Point61PercentMember" xlink:label="csan_USDollarIndexPlusLibor6MonthPlus0Point61PercentMember" xlink:title="csan_USDollarIndexPlusLibor6MonthPlus0Point61PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_USDollarIndexPlusLibor6MonthPlus0Point61PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_USDollarIndexPlusLibor6MonthPlus0Point61PercentMember" xlink:type="arc" order="14" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GBPIndexPlusLibor6MonthPlus1Point50PercentMember" xlink:label="csan_GBPIndexPlusLibor6MonthPlus1Point50PercentMember" xlink:title="csan_GBPIndexPlusLibor6MonthPlus1Point50PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_GBPIndexPlusLibor6MonthPlus1Point50PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_GBPIndexPlusLibor6MonthPlus1Point50PercentMember" xlink:type="arc" order="15" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GBPIndexFixedInterestRateMember" xlink:label="csan_GBPIndexFixedInterestRateMember" xlink:title="csan_GBPIndexFixedInterestRateMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_GBPIndexFixedInterestRateMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_GBPIndexFixedInterestRateMember" xlink:type="arc" order="16" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GBPIndexPlusLibor6MonthPlus1Point10PercentMember" xlink:label="csan_GBPIndexPlusLibor6MonthPlus1Point10PercentMember" xlink:title="csan_GBPIndexPlusLibor6MonthPlus1Point10PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_GBPIndexPlusLibor6MonthPlus1Point10PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_GBPIndexPlusLibor6MonthPlus1Point10PercentMember" xlink:type="arc" order="17" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EUROIndexFixedInterestRateMember" xlink:label="csan_EUROIndexFixedInterestRateMember" xlink:title="csan_EUROIndexFixedInterestRateMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_EUROIndexFixedInterestRateMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_EUROIndexFixedInterestRateMember" xlink:type="arc" order="18" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CDIIndexPlus1Point03PercentMember" xlink:label="csan_CDIIndexPlus1Point03PercentMember" xlink:title="csan_CDIIndexPlus1Point03PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_CDIIndexPlus1Point03PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_CDIIndexPlus1Point03PercentMember" xlink:type="arc" order="19" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CDIIndexPlus0Point80PercentMember" xlink:label="csan_CDIIndexPlus0Point80PercentMember" xlink:title="csan_CDIIndexPlus0Point80PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_CDIIndexPlus0Point80PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_CDIIndexPlus0Point80PercentMember" xlink:type="arc" order="20" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CDIIndexPlus3Point05PercentMember" xlink:label="csan_CDIIndexPlus3Point05PercentMember" xlink:title="csan_CDIIndexPlus3Point05PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_CDIIndexPlus3Point05PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_CDIIndexPlus3Point05PercentMember" xlink:type="arc" order="21" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CDIIndexPlus3Point15PercentMember" xlink:label="csan_CDIIndexPlus3Point15PercentMember" xlink:title="csan_CDIIndexPlus3Point15PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_CDIIndexPlus3Point15PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_CDIIndexPlus3Point15PercentMember" xlink:type="arc" order="22" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_USDollarIndexPlusLiborMember" xlink:label="csan_USDollarIndexPlusLiborMember" xlink:title="csan_USDollarIndexPlusLiborMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_USDollarIndexPlusLiborMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_USDollarIndexPlusLiborMember" xlink:type="arc" order="23" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_USDollarIndexMember" xlink:label="csan_USDollarIndexMember" xlink:title="csan_USDollarIndexMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_USDollarIndexMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_USDollarIndexMember" xlink:type="arc" order="24" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_USDollarIndexFixedInterestRateMember" xlink:label="csan_USDollarIndexFixedInterestRateMember" xlink:title="csan_USDollarIndexFixedInterestRateMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_USDollarIndexFixedInterestRateMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_USDollarIndexFixedInterestRateMember" xlink:type="arc" order="25" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CDIIndexMember" xlink:label="csan_CDIIndexMember" xlink:title="csan_CDIIndexMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_CDIIndexMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_CDIIndexMember" xlink:type="arc" order="26" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_USDollarIndexPlus3Point67PercentMember" xlink:label="csan_USDollarIndexPlus3Point67PercentMember" xlink:title="csan_USDollarIndexPlus3Point67PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_USDollarIndexPlus3Point67PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_USDollarIndexPlus3Point67PercentMember" xlink:type="arc" order="27" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_USDollarIndexPlus1Point59PercentMember" xlink:label="csan_USDollarIndexPlus1Point59PercentMember" xlink:title="csan_USDollarIndexPlus1Point59PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_USDollarIndexPlus1Point59PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_USDollarIndexPlus1Point59PercentMember" xlink:type="arc" order="28" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IPCAIndexPlus0Point81PercentMember" xlink:label="csan_IPCAIndexPlus0Point81PercentMember" xlink:title="csan_IPCAIndexPlus0Point81PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IPCAIndexPlus0Point81PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IPCAIndexPlus0Point81PercentMember" xlink:type="arc" order="29" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_Libor3MonthPlus3Point50PercentMember" xlink:label="csan_Libor3MonthPlus3Point50PercentMember" xlink:title="csan_Libor3MonthPlus3Point50PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_Libor3MonthPlus3Point50PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_Libor3MonthPlus3Point50PercentMember" xlink:type="arc" order="30" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_Libor3MonthPlus1Point00PercentMember" xlink:label="csan_Libor3MonthPlus1Point00PercentMember" xlink:title="csan_Libor3MonthPlus1Point00PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_Libor3MonthPlus1Point00PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_Libor3MonthPlus1Point00PercentMember" xlink:type="arc" order="31" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_Libor12MonthPlus0Point76PercentMember" xlink:label="csan_Libor12MonthPlus0Point76PercentMember" xlink:title="csan_Libor12MonthPlus0Point76PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_Libor12MonthPlus0Point76PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_Libor12MonthPlus0Point76PercentMember" xlink:type="arc" order="32" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CDIIndex125PercentMember" xlink:label="csan_CDIIndex125PercentMember" xlink:title="csan_CDIIndex125PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_CDIIndex125PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_CDIIndex125PercentMember" xlink:type="arc" order="33" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CDIIndex106PercentMember" xlink:label="csan_CDIIndex106PercentMember" xlink:title="csan_CDIIndex106PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_CDIIndex106PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_CDIIndex106PercentMember" xlink:type="arc" order="34" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IPCAIndexPlus4Point68PercentMember" xlink:label="csan_IPCAIndexPlus4Point68PercentMember" xlink:title="csan_IPCAIndexPlus4Point68PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IPCAIndexPlus4Point68PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IPCAIndexPlus4Point68PercentMember" xlink:type="arc" order="35" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IPCAIndexPlus4Point50PercentMember" xlink:label="csan_IPCAIndexPlus4Point50PercentMember" xlink:title="csan_IPCAIndexPlus4Point50PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IPCAIndexPlus4Point50PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IPCAIndexPlus4Point50PercentMember" xlink:type="arc" order="36" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IPCAIndexPlus5Point57PercentMember" xlink:label="csan_IPCAIndexPlus5Point57PercentMember" xlink:title="csan_IPCAIndexPlus5Point57PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IPCAIndexPlus5Point57PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IPCAIndexPlus5Point57PercentMember" xlink:type="arc" order="37" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CDIIndexPlus2Point65PercentMember" xlink:label="csan_CDIIndexPlus2Point65PercentMember" xlink:title="csan_CDIIndexPlus2Point65PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_CDIIndexPlus2Point65PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_CDIIndexPlus2Point65PercentMember" xlink:type="arc" order="38" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IPCAIndexPlus6Point80PercentMember" xlink:label="csan_IPCAIndexPlus6Point80PercentMember" xlink:title="csan_IPCAIndexPlus6Point80PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IPCAIndexPlus6Point80PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IPCAIndexPlus6Point80PercentMember" xlink:type="arc" order="39" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IPCAIndexPlus3Point90PercentMember" xlink:label="csan_IPCAIndexPlus3Point90PercentMember" xlink:title="csan_IPCAIndexPlus3Point90PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IPCAIndexPlus3Point90PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IPCAIndexPlus3Point90PercentMember" xlink:type="arc" order="40" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IPCAIndexPlus4Point00PercentMember" xlink:label="csan_IPCAIndexPlus4Point00PercentMember" xlink:title="csan_IPCAIndexPlus4Point00PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IPCAIndexPlus4Point00PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IPCAIndexPlus4Point00PercentMember" xlink:type="arc" order="41" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IPCAIndexPlus7Point14PercentMember" xlink:label="csan_IPCAIndexPlus7Point14PercentMember" xlink:title="csan_IPCAIndexPlus7Point14PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IPCAIndexPlus7Point14PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IPCAIndexPlus7Point14PercentMember" xlink:type="arc" order="42" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IPCAIndexPlus7Point48PercentMember" xlink:label="csan_IPCAIndexPlus7Point48PercentMember" xlink:title="csan_IPCAIndexPlus7Point48PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IPCAIndexPlus7Point48PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IPCAIndexPlus7Point48PercentMember" xlink:type="arc" order="43" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IPCAIndexPlus7Point36PercentMember" xlink:label="csan_IPCAIndexPlus7Point36PercentMember" xlink:title="csan_IPCAIndexPlus7Point36PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IPCAIndexPlus7Point36PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IPCAIndexPlus7Point36PercentMember" xlink:type="arc" order="44" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IPCAIndexPlus5Point87PercentMember" xlink:label="csan_IPCAIndexPlus5Point87PercentMember" xlink:title="csan_IPCAIndexPlus5Point87PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IPCAIndexPlus5Point87PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IPCAIndexPlus5Point87PercentMember" xlink:type="arc" order="45" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IPCAIndexPlus4Point33PercentMember" xlink:label="csan_IPCAIndexPlus4Point33PercentMember" xlink:title="csan_IPCAIndexPlus4Point33PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IPCAIndexPlus4Point33PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IPCAIndexPlus4Point33PercentMember" xlink:type="arc" order="46" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IGPMIndexPlus6Point10PercentMember" xlink:label="csan_IGPMIndexPlus6Point10PercentMember" xlink:title="csan_IGPMIndexPlus6Point10PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IGPMIndexPlus6Point10PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IGPMIndexPlus6Point10PercentMember" xlink:type="arc" order="47" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CDIIndexPlus0Point50PercentMember" xlink:label="csan_CDIIndexPlus0Point50PercentMember" xlink:title="csan_CDIIndexPlus0Point50PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_CDIIndexPlus0Point50PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_CDIIndexPlus0Point50PercentMember" xlink:type="arc" order="48" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CDIIndexPlus2Point75PercentMember" xlink:label="csan_CDIIndexPlus2Point75PercentMember" xlink:title="csan_CDIIndexPlus2Point75PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_CDIIndexPlus2Point75PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_CDIIndexPlus2Point75PercentMember" xlink:type="arc" order="49" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CDIIndexPlus3Point00PercentMember" xlink:label="csan_CDIIndexPlus3Point00PercentMember" xlink:title="csan_CDIIndexPlus3Point00PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_CDIIndexPlus3Point00PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_CDIIndexPlus3Point00PercentMember" xlink:type="arc" order="50" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CDIIndexPlus3Point40PercentMember" xlink:label="csan_CDIIndexPlus3Point40PercentMember" xlink:title="csan_CDIIndexPlus3Point40PercentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_CDIIndexPlus3Point40PercentMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_CDIIndexPlus3Point40PercentMember" xlink:type="arc" order="51" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateTypesMember" xlink:label="ifrs-full_InterestRateTypesMember_1" xlink:title="ifrs-full_InterestRateTypesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfInterestRatesAxis" xlink:to="ifrs-full_InterestRateTypesMember_1" xlink:title="Definition : ifrs-full_TypesOfInterestRatesAxis to ifrs-full_InterestRateTypesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MaturityAxis" xlink:label="ifrs-full_MaturityAxis" xlink:title="ifrs-full_MaturityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_MaturityAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable to ifrs-full_MaturityAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember" xlink:title="ifrs-full_AggregatedTimeBandsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember" xlink:title="Definition : ifrs-full_MaturityAxis to ifrs-full_AggregatedTimeBandsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_June2023Member" xlink:label="csan_June2023Member" xlink:title="csan_June2023Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_June2023Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_June2023Member" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_December2029Member" xlink:label="csan_December2029Member" xlink:title="csan_December2029Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_December2029Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_December2029Member" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_January2025Member" xlink:label="csan_January2025Member" xlink:title="csan_January2025Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_January2025Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_January2025Member" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_October2020Member" xlink:label="csan_October2020Member" xlink:title="csan_October2020Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_October2020Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_October2020Member" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_September2020Member" xlink:label="csan_September2020Member" xlink:title="csan_September2020Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_September2020Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_September2020Member" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_November2021Member" xlink:label="csan_November2021Member" xlink:title="csan_November2021Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_November2021Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_November2021Member" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_March2022Member" xlink:label="csan_March2022Member" xlink:title="csan_March2022Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_March2022Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_March2022Member" xlink:type="arc" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_January2024Member" xlink:label="csan_January2024Member" xlink:title="csan_January2024Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_January2024Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_January2024Member" xlink:type="arc" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_April2029Member" xlink:label="csan_April2029Member" xlink:title="csan_April2029Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_April2029Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_April2029Member" xlink:type="arc" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_September2026Member" xlink:label="csan_September2026Member" xlink:title="csan_September2026Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_September2026Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_September2026Member" xlink:type="arc" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_June2020Member" xlink:label="csan_June2020Member" xlink:title="csan_June2020Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_June2020Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_June2020Member" xlink:type="arc" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_May2021Member" xlink:label="csan_May2021Member" xlink:title="csan_May2021Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_May2021Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_May2021Member" xlink:type="arc" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_September2021Member" xlink:label="csan_September2021Member" xlink:title="csan_September2021Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_September2021Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_September2021Member" xlink:type="arc" order="12" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_July2021Member" xlink:label="csan_July2021Member" xlink:title="csan_July2021Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_July2021Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_July2021Member" xlink:type="arc" order="13" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_November2022Member" xlink:label="csan_November2022Member" xlink:title="csan_November2022Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_November2022Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_November2022Member" xlink:type="arc" order="14" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_December2021Member" xlink:label="csan_December2021Member" xlink:title="csan_December2021Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_December2021Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_December2021Member" xlink:type="arc" order="15" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_December2022Member" xlink:label="csan_December2022Member" xlink:title="csan_December2022Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_December2022Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_December2022Member" xlink:type="arc" order="16" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_September2022Member" xlink:label="csan_September2022Member" xlink:title="csan_September2022Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_September2022Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_September2022Member" xlink:type="arc" order="17" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_February2023Member" xlink:label="csan_February2023Member" xlink:title="csan_February2023Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_February2023Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_February2023Member" xlink:type="arc" order="18" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_December2023Member" xlink:label="csan_December2023Member" xlink:title="csan_December2023Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_December2023Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_December2023Member" xlink:type="arc" order="19" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_March2021Member" xlink:label="csan_March2021Member" xlink:title="csan_March2021Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_March2021Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_March2021Member" xlink:type="arc" order="20" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_February2020Member" xlink:label="csan_February2020Member" xlink:title="csan_February2020Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_February2020Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_February2020Member" xlink:type="arc" order="21" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_April2021Member" xlink:label="csan_April2021Member" xlink:title="csan_April2021Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_April2021Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_April2021Member" xlink:type="arc" order="22" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_May2023Member" xlink:label="csan_May2023Member" xlink:title="csan_May2023Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_May2023Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_May2023Member" xlink:type="arc" order="23" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_January2048Member" xlink:label="csan_January2048Member" xlink:title="csan_January2048Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_January2048Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_January2048Member" xlink:type="arc" order="24" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_November2040Member" xlink:label="csan_November2040Member" xlink:title="csan_November2040Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_November2040Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_November2040Member" xlink:type="arc" order="25" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_March2023Member" xlink:label="csan_March2023Member" xlink:title="csan_March2023Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_March2023Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_March2023Member" xlink:type="arc" order="26" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_February2024Member" xlink:label="csan_February2024Member" xlink:title="csan_February2024Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_February2024Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_February2024Member" xlink:type="arc" order="27" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_September2024Member" xlink:label="csan_September2024Member" xlink:title="csan_September2024Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_September2024Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_September2024Member" xlink:type="arc" order="28" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_January2027Member" xlink:label="csan_January2027Member" xlink:title="csan_January2027Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_January2027Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_January2027Member" xlink:type="arc" order="29" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_January2028Member" xlink:label="csan_January2028Member" xlink:title="csan_January2028Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_January2028Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_January2028Member" xlink:type="arc" order="30" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_September2029Member" xlink:label="csan_September2029Member" xlink:title="csan_September2029Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_September2029Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_September2029Member" xlink:type="arc" order="31" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_February2021Member" xlink:label="csan_February2021Member" xlink:title="csan_February2021Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_February2021Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_February2021Member" xlink:type="arc" order="32" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_February2026Member" xlink:label="csan_February2026Member" xlink:title="csan_February2026Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_February2026Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_February2026Member" xlink:type="arc" order="33" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_February2029Member" xlink:label="csan_February2029Member" xlink:title="csan_February2029Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_February2029Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_February2029Member" xlink:type="arc" order="34" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_August2025Member" xlink:label="csan_August2025Member" xlink:title="csan_August2025Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_August2025Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_August2025Member" xlink:type="arc" order="35" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_April2030Member" xlink:label="csan_April2030Member" xlink:title="csan_April2030Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_April2030Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_April2030Member" xlink:type="arc" order="36" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_October2029Member" xlink:label="csan_October2029Member" xlink:title="csan_October2029Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_October2029Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_October2029Member" xlink:type="arc" order="37" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_December2020Member" xlink:label="csan_December2020Member" xlink:title="csan_December2020Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_December2020Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_December2020Member" xlink:type="arc" order="38" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_December2025Member" xlink:label="csan_December2025Member" xlink:title="csan_December2025Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_December2025Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_December2025Member" xlink:type="arc" order="39" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_October2024Member" xlink:label="csan_October2024Member" xlink:title="csan_October2024Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_October2024Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_October2024Member" xlink:type="arc" order="40" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_May2028Member" xlink:label="csan_May2028Member" xlink:title="csan_May2028Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_May2028Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_May2028Member" xlink:type="arc" order="41" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_October2022Member" xlink:label="csan_October2022Member" xlink:title="csan_October2022Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_October2022Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_October2022Member" xlink:type="arc" order="42" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_June2022Member" xlink:label="csan_June2022Member" xlink:title="csan_June2022Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_June2022Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_June2022Member" xlink:type="arc" order="43" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_January2020Member" xlink:label="csan_January2020Member" xlink:title="csan_January2020Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_January2020Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_January2020Member" xlink:type="arc" order="44" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_July2022Member" xlink:label="csan_July2022Member" xlink:title="csan_July2022Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_July2022Member" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_July2022Member" xlink:type="arc" order="45" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember_1" xlink:title="ifrs-full_AggregatedTimeBandsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember_1" xlink:title="Definition : ifrs-full_MaturityAxis to ifrs-full_AggregatedTimeBandsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" xlink:title="ifrs-full_RangeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_RangeAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable to ifrs-full_RangeAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_WeightedAverageMember" xlink:label="ifrs-full_WeightedAverageMember" xlink:title="ifrs-full_WeightedAverageMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_WeightedAverageMember" xlink:title="Definition : ifrs-full_RangesMember to ifrs-full_WeightedAverageMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember_1" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember_1" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfNonCurrentBorrowingsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:title="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:title="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MaturityAxis" xlink:label="ifrs-full_MaturityAxis" xlink:title="ifrs-full_MaturityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_MaturityAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable to ifrs-full_MaturityAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember" xlink:title="ifrs-full_AggregatedTimeBandsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember" xlink:title="Definition : ifrs-full_MaturityAxis to ifrs-full_AggregatedTimeBandsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LaterThanEightYearsMember" xlink:label="csan_LaterThanEightYearsMember" xlink:title="csan_LaterThanEightYearsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_LaterThanEightYearsMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_LaterThanEightYearsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LaterThanFiveYearsAndNotLaterThanSixYearsMember" xlink:label="csan_LaterThanFiveYearsAndNotLaterThanSixYearsMember" xlink:title="csan_LaterThanFiveYearsAndNotLaterThanSixYearsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_LaterThanFiveYearsAndNotLaterThanSixYearsMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_LaterThanFiveYearsAndNotLaterThanSixYearsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember" xlink:label="ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember" xlink:title="ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember" xlink:label="ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember" xlink:title="ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LaterThanSevenYearsAndNotLaterThanEightYearsMember" xlink:label="csan_LaterThanSevenYearsAndNotLaterThanEightYearsMember" xlink:title="csan_LaterThanSevenYearsAndNotLaterThanEightYearsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_LaterThanSevenYearsAndNotLaterThanEightYearsMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_LaterThanSevenYearsAndNotLaterThanEightYearsMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LaterThanSixYearsAndNotLaterThanSevenYearsMember" xlink:label="csan_LaterThanSixYearsAndNotLaterThanSevenYearsMember" xlink:title="csan_LaterThanSixYearsAndNotLaterThanSevenYearsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_LaterThanSixYearsAndNotLaterThanSevenYearsMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_LaterThanSixYearsAndNotLaterThanSevenYearsMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember" xlink:label="ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember" xlink:title="ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember" xlink:label="ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember" xlink:title="ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember_1" xlink:title="ifrs-full_AggregatedTimeBandsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember_1" xlink:title="Definition : ifrs-full_MaturityAxis to ifrs-full_AggregatedTimeBandsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LongtermBorrowings" xlink:label="ifrs-full_LongtermBorrowings" xlink:title="ifrs-full_LongtermBorrowings"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_LongtermBorrowings" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to ifrs-full_LongtermBorrowings" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfCarryingInLoansBorrowingsAndDebenturesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:title="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Borrowings" xlink:label="ifrs-full_Borrowings" xlink:title="ifrs-full_Borrowings"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_Borrowings" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to ifrs-full_Borrowings" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:title="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CurrencyAxis" xlink:label="srt_CurrencyAxis" xlink:title="srt_CurrencyAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="srt_CurrencyAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable to srt_CurrencyAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/currency/2019/currency-2019-01-31.xsd#currency_AllCurrenciesDomain" xlink:label="currency_AllCurrenciesDomain" xlink:title="currency_AllCurrenciesDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_CurrencyAxis" xlink:to="currency_AllCurrenciesDomain" xlink:title="Definition : srt_CurrencyAxis to currency_AllCurrenciesDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/currency/2019/currency-2019-01-31.xsd#currency_BRL" xlink:label="currency_BRL" xlink:title="currency_BRL"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="currency_AllCurrenciesDomain" xlink:to="currency_BRL" xlink:title="Definition : currency_AllCurrenciesDomain to currency_BRL" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/currency/2019/currency-2019-01-31.xsd#currency_GBP" xlink:label="currency_GBP" xlink:title="currency_GBP"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="currency_AllCurrenciesDomain" xlink:to="currency_GBP" xlink:title="Definition : currency_AllCurrenciesDomain to currency_GBP" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/currency/2019/currency-2019-01-31.xsd#currency_USD" xlink:label="currency_USD" xlink:title="currency_USD"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="currency_AllCurrenciesDomain" xlink:to="currency_USD" xlink:title="Definition : currency_AllCurrenciesDomain to currency_USD" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EURMember" xlink:label="csan_EURMember" xlink:title="csan_EURMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="currency_AllCurrenciesDomain" xlink:to="csan_EURMember" xlink:title="Definition : currency_AllCurrenciesDomain to csan_EURMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/currency/2019/currency-2019-01-31.xsd#currency_AllCurrenciesDomain" xlink:label="currency_AllCurrenciesDomain_1" xlink:title="currency_AllCurrenciesDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_CurrencyAxis" xlink:to="currency_AllCurrenciesDomain_1" xlink:title="Definition : srt_CurrencyAxis to currency_AllCurrenciesDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesScheduleRequiredToComplyFinancialCovenantsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:title="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BorrowingsDescriptionOfFinancialCovenants" xlink:label="csan_BorrowingsDescriptionOfFinancialCovenants" xlink:title="csan_BorrowingsDescriptionOfFinancialCovenants"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="csan_BorrowingsDescriptionOfFinancialCovenants" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to csan_BorrowingsDescriptionOfFinancialCovenants" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FinancialCovenantLeverageRatio" xlink:label="csan_FinancialCovenantLeverageRatio" xlink:title="csan_FinancialCovenantLeverageRatio"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="csan_FinancialCovenantLeverageRatio" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to csan_FinancialCovenantLeverageRatio" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:title="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:type="arc" use="optional" order="2" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="ifrs-full_BorrowingsByNameAxis" xlink:title="ifrs-full_BorrowingsByNameAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_BorrowingsByNameAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable to ifrs-full_BorrowingsByNameAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember" xlink:title="ifrs-full_BorrowingsByNameMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember" xlink:title="Definition : ifrs-full_BorrowingsByNameAxis to ifrs-full_BorrowingsByNameMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BrazilianNationalEconomicandSocialDevelopmentBankMember" xlink:label="csan_BrazilianNationalEconomicandSocialDevelopmentBankMember" xlink:title="csan_BrazilianNationalEconomicandSocialDevelopmentBankMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_BrazilianNationalEconomicandSocialDevelopmentBankMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_BrazilianNationalEconomicandSocialDevelopmentBankMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_Resolution4131Member" xlink:label="csan_Resolution4131Member" xlink:title="csan_Resolution4131Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_Resolution4131Member" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_Resolution4131Member" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PromissoryNotesMember" xlink:label="csan_PromissoryNotesMember" xlink:title="csan_PromissoryNotesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_PromissoryNotesMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_PromissoryNotesMember" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_Debentures5ThTo8ThIssuesMember" xlink:label="csan_Debentures5ThTo8ThIssuesMember" xlink:title="csan_Debentures5ThTo8ThIssuesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_Debentures5ThTo8ThIssuesMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_Debentures5ThTo8ThIssuesMember" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DebenturesFourthIssueMember" xlink:label="csan_DebenturesFourthIssueMember" xlink:title="csan_DebenturesFourthIssueMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_DebenturesFourthIssueMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_DebenturesFourthIssueMember" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDue2024Member" xlink:label="csan_SeniorNotesDue2024Member" xlink:title="csan_SeniorNotesDue2024Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDue2024Member" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDue2024Member" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDue2025Member" xlink:label="csan_SeniorNotesDue2025Member" xlink:title="csan_SeniorNotesDue2025Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDue2025Member" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDue2025Member" xlink:type="arc" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDue2027Member" xlink:label="csan_SeniorNotesDue2027Member" xlink:title="csan_SeniorNotesDue2027Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDue2027Member" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDue2027Member" xlink:type="arc" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDue2029Member" xlink:label="csan_SeniorNotesDue2029Member" xlink:title="csan_SeniorNotesDue2029Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDue2029Member" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDue2029Member" xlink:type="arc" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember_1" xlink:title="ifrs-full_BorrowingsByNameMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember_1" xlink:title="Definition : ifrs-full_BorrowingsByNameAxis to ifrs-full_BorrowingsByNameMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasMember" xlink:label="csan_ComgasMember" xlink:title="csan_ComgasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ComgasMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ComgasMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoSAMember" xlink:label="csan_RumoSAMember" xlink:title="csan_RumoSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoSAMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:title="ifrs-full_BusinessCombinationsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable to ifrs-full_BusinessCombinationsAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:title="ifrs-full_EntitysTotalForBusinessCombinationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:title="Definition : ifrs-full_BusinessCombinationsAxis to ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAMember" xlink:label="csan_CosanSAMember" xlink:title="csan_CosanSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="csan_CosanSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForBusinessCombinationsMember to csan_CosanSAMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLimitedMember" xlink:label="csan_CosanLimitedMember" xlink:title="csan_CosanLimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="csan_CosanLimitedMember" xlink:title="Definition : ifrs-full_EntitysTotalForBusinessCombinationsMember to csan_CosanLimitedMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember_1" xlink:title="ifrs-full_EntitysTotalForBusinessCombinationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember_1" xlink:title="Definition : ifrs-full_BusinessCombinationsAxis to ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfMovementOfLeasesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfMovementOfLeasesLineItems" xlink:label="csan_DisclosureOfMovementOfLeasesLineItems" xlink:title="csan_DisclosureOfMovementOfLeasesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfMovementOfLeasesTable" xlink:label="csan_DisclosureOfMovementOfLeasesTable" xlink:title="csan_DisclosureOfMovementOfLeasesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfMovementOfLeasesLineItems" xlink:to="csan_DisclosureOfMovementOfLeasesTable" xlink:title="Definition : csan_DisclosureOfMovementOfLeasesLineItems to csan_DisclosureOfMovementOfLeasesTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis" xlink:label="ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis" xlink:title="ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfMovementOfLeasesTable" xlink:to="ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis" xlink:title="Definition : csan_DisclosureOfMovementOfLeasesTable to ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember" xlink:label="ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember" xlink:title="ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis" xlink:to="ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember" xlink:title="Definition : ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis to ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FinanceLeaseMember" xlink:label="csan_FinanceLeaseMember" xlink:title="csan_FinanceLeaseMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember" xlink:to="csan_FinanceLeaseMember" xlink:title="Definition : ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember to csan_FinanceLeaseMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OperationalLeaseMember" xlink:label="csan_OperationalLeaseMember" xlink:title="csan_OperationalLeaseMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember" xlink:to="csan_OperationalLeaseMember" xlink:title="Definition : ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember to csan_OperationalLeaseMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember" xlink:label="ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember_1" xlink:title="ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis" xlink:to="ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember_1" xlink:title="Definition : ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis to ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OperatingLeaseLiability" xlink:label="csan_OperatingLeaseLiability" xlink:title="csan_OperatingLeaseLiability"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfMovementOfLeasesLineItems" xlink:to="csan_OperatingLeaseLiability" xlink:title="Definition : csan_DisclosureOfMovementOfLeasesLineItems to csan_OperatingLeaseLiability" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_InitialRecognitionOfIfrs16" xlink:label="csan_InitialRecognitionOfIfrs16" xlink:title="csan_InitialRecognitionOfIfrs16"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfMovementOfLeasesLineItems" xlink:to="csan_InitialRecognitionOfIfrs16" xlink:title="Definition : csan_DisclosureOfMovementOfLeasesLineItems to csan_InitialRecognitionOfIfrs16" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdditionsToRightofuseAssets" xlink:label="ifrs-full_AdditionsToRightofuseAssets" xlink:title="ifrs-full_AdditionsToRightofuseAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfMovementOfLeasesLineItems" xlink:to="ifrs-full_AdditionsToRightofuseAssets" xlink:title="Definition : csan_DisclosureOfMovementOfLeasesLineItems to ifrs-full_AdditionsToRightofuseAssets" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TransferOfLiabilities" xlink:label="csan_TransferOfLiabilities" xlink:title="csan_TransferOfLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfMovementOfLeasesLineItems" xlink:to="csan_TransferOfLiabilities" xlink:title="Definition : csan_DisclosureOfMovementOfLeasesLineItems to csan_TransferOfLiabilities" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ContractsMonetaryCorrection" xlink:label="csan_ContractsMonetaryCorrection" xlink:title="csan_ContractsMonetaryCorrection"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfMovementOfLeasesLineItems" xlink:to="csan_ContractsMonetaryCorrection" xlink:title="Definition : csan_DisclosureOfMovementOfLeasesLineItems to csan_ContractsMonetaryCorrection" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentLeaseLiabilities" xlink:label="ifrs-full_CurrentLeaseLiabilities" xlink:title="ifrs-full_CurrentLeaseLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfMovementOfLeasesLineItems" xlink:to="ifrs-full_CurrentLeaseLiabilities" xlink:title="Definition : csan_DisclosureOfMovementOfLeasesLineItems to ifrs-full_CurrentLeaseLiabilities" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentLeaseLiabilities" xlink:label="ifrs-full_NoncurrentLeaseLiabilities" xlink:title="ifrs-full_NoncurrentLeaseLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfMovementOfLeasesLineItems" xlink:to="ifrs-full_NoncurrentLeaseLiabilities" xlink:title="Definition : csan_DisclosureOfMovementOfLeasesLineItems to ifrs-full_NoncurrentLeaseLiabilities" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LeaseLiabilities" xlink:label="ifrs-full_LeaseLiabilities" xlink:title="ifrs-full_LeaseLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfMovementOfLeasesLineItems" xlink:to="ifrs-full_LeaseLiabilities" xlink:title="Definition : csan_DisclosureOfMovementOfLeasesLineItems to ifrs-full_LeaseLiabilities" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestExpenseOnLeaseLiabilities" xlink:label="ifrs-full_InterestExpenseOnLeaseLiabilities" xlink:title="ifrs-full_InterestExpenseOnLeaseLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfMovementOfLeasesLineItems" xlink:to="ifrs-full_InterestExpenseOnLeaseLiabilities" xlink:title="Definition : csan_DisclosureOfMovementOfLeasesLineItems to ifrs-full_InterestExpenseOnLeaseLiabilities" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PaymentOfLeasePrincipal" xlink:label="csan_PaymentOfLeasePrincipal" xlink:title="csan_PaymentOfLeasePrincipal"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfMovementOfLeasesLineItems" xlink:to="csan_PaymentOfLeasePrincipal" xlink:title="Definition : csan_DisclosureOfMovementOfLeasesLineItems to csan_PaymentOfLeasePrincipal" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PaymentOfLeaseInterest" xlink:label="csan_PaymentOfLeaseInterest" xlink:title="csan_PaymentOfLeaseInterest"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfMovementOfLeasesLineItems" xlink:to="csan_PaymentOfLeaseInterest" xlink:title="Definition : csan_DisclosureOfMovementOfLeasesLineItems to csan_PaymentOfLeaseInterest" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfLeaseExpenseDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfLeaseExpenseLineItems" xlink:label="csan_DisclosureOfLeaseExpenseLineItems" xlink:title="csan_DisclosureOfLeaseExpenseLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfLeaseExpenseTable" xlink:label="csan_DisclosureOfLeaseExpenseTable" xlink:title="csan_DisclosureOfLeaseExpenseTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfLeaseExpenseLineItems" xlink:to="csan_DisclosureOfLeaseExpenseTable" xlink:title="Definition : csan_DisclosureOfLeaseExpenseLineItems to csan_DisclosureOfLeaseExpenseTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ExpenseRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfLeaseLiabilities" xlink:label="ifrs-full_ExpenseRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfLeaseLiabilities" xlink:title="ifrs-full_ExpenseRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfLeaseLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfLeaseExpenseLineItems" xlink:to="ifrs-full_ExpenseRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfLeaseLiabilities" xlink:title="Definition : csan_DisclosureOfLeaseExpenseLineItems to ifrs-full_ExpenseRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfLeaseLiabilities" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ExpenseRelatingToShorttermLeasesForWhichRecognitionExemptionHasBeenUsed" xlink:label="ifrs-full_ExpenseRelatingToShorttermLeasesForWhichRecognitionExemptionHasBeenUsed" xlink:title="ifrs-full_ExpenseRelatingToShorttermLeasesForWhichRecognitionExemptionHasBeenUsed"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfLeaseExpenseLineItems" xlink:to="ifrs-full_ExpenseRelatingToShorttermLeasesForWhichRecognitionExemptionHasBeenUsed" xlink:title="Definition : csan_DisclosureOfLeaseExpenseLineItems to ifrs-full_ExpenseRelatingToShorttermLeasesForWhichRecognitionExemptionHasBeenUsed" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed" xlink:label="ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed" xlink:title="ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfLeaseExpenseLineItems" xlink:to="ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed" xlink:title="Definition : csan_DisclosureOfLeaseExpenseLineItems to ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LeaseExpense" xlink:label="csan_LeaseExpense" xlink:title="csan_LeaseExpense"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfLeaseExpenseLineItems" xlink:to="csan_LeaseExpense" xlink:title="Definition : csan_DisclosureOfLeaseExpenseLineItems to csan_LeaseExpense" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfTradePayablesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfTradeAndOtherPayablesLineItems" xlink:label="csan_DisclosureOfTradeAndOtherPayablesLineItems" xlink:title="csan_DisclosureOfTradeAndOtherPayablesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TradeAndOtherPayablesToTradeSuppliers" xlink:label="ifrs-full_TradeAndOtherPayablesToTradeSuppliers" xlink:title="ifrs-full_TradeAndOtherPayablesToTradeSuppliers"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfTradeAndOtherPayablesLineItems" xlink:to="ifrs-full_TradeAndOtherPayablesToTradeSuppliers" xlink:title="Definition : csan_DisclosureOfTradeAndOtherPayablesLineItems to ifrs-full_TradeAndOtherPayablesToTradeSuppliers" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherPayables" xlink:label="ifrs-full_OtherPayables" xlink:title="ifrs-full_OtherPayables"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfTradeAndOtherPayablesLineItems" xlink:to="ifrs-full_OtherPayables" xlink:title="Definition : csan_DisclosureOfTradeAndOtherPayablesLineItems to ifrs-full_OtherPayables" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TradeAndOtherPayables" xlink:label="ifrs-full_TradeAndOtherPayables" xlink:title="ifrs-full_TradeAndOtherPayables"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfTradeAndOtherPayablesLineItems" xlink:to="ifrs-full_TradeAndOtherPayables" xlink:title="Definition : csan_DisclosureOfTradeAndOtherPayablesLineItems to ifrs-full_TradeAndOtherPayables" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfTradeAndOtherPayablesTable" xlink:label="csan_DisclosureOfTradeAndOtherPayablesTable" xlink:title="csan_DisclosureOfTradeAndOtherPayablesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfTradeAndOtherPayablesLineItems" xlink:to="csan_DisclosureOfTradeAndOtherPayablesTable" xlink:title="Definition : csan_DisclosureOfTradeAndOtherPayablesLineItems to csan_DisclosureOfTradeAndOtherPayablesTable" xlink:type="arc" use="optional" order="3" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesAxis" xlink:label="ifrs-full_CounterpartiesAxis" xlink:title="ifrs-full_CounterpartiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfTradeAndOtherPayablesTable" xlink:to="ifrs-full_CounterpartiesAxis" xlink:title="Definition : csan_DisclosureOfTradeAndOtherPayablesTable to ifrs-full_CounterpartiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember" xlink:title="ifrs-full_CounterpartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember" xlink:title="Definition : ifrs-full_CounterpartiesAxis to ifrs-full_CounterpartiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MaterialsAndServiceSuppliersMember" xlink:label="csan_MaterialsAndServiceSuppliersMember" xlink:title="csan_MaterialsAndServiceSuppliersMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="csan_MaterialsAndServiceSuppliersMember" xlink:title="Definition : ifrs-full_CounterpartiesMember to csan_MaterialsAndServiceSuppliersMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NaturalGasAndTransportationSuppliersMember" xlink:label="csan_NaturalGasAndTransportationSuppliersMember" xlink:title="csan_NaturalGasAndTransportationSuppliersMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="csan_NaturalGasAndTransportationSuppliersMember" xlink:title="Definition : ifrs-full_CounterpartiesMember to csan_NaturalGasAndTransportationSuppliersMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ElectricityAndTransportationSuppliersMember" xlink:label="csan_ElectricityAndTransportationSuppliersMember" xlink:title="csan_ElectricityAndTransportationSuppliersMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="csan_ElectricityAndTransportationSuppliersMember" xlink:title="Definition : ifrs-full_CounterpartiesMember to csan_ElectricityAndTransportationSuppliersMember" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FuelAndLubricantsSuppliersMember" xlink:label="csan_FuelAndLubricantsSuppliersMember" xlink:title="csan_FuelAndLubricantsSuppliersMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="csan_FuelAndLubricantsSuppliersMember" xlink:title="Definition : ifrs-full_CounterpartiesMember to csan_FuelAndLubricantsSuppliersMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember_1" xlink:title="ifrs-full_CounterpartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember_1" xlink:title="Definition : ifrs-full_CounterpartiesAxis to ifrs-full_CounterpartiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfDerivativeFinancialInstrumentsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:title="ifrs-full_DisclosureOfFinancialInstrumentsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DerivativeFinancialInstruments" xlink:label="csan_DerivativeFinancialInstruments" xlink:title="csan_DerivativeFinancialInstruments"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:to="csan_DerivativeFinancialInstruments" xlink:title="Definition : ifrs-full_DisclosureOfFinancialInstrumentsLineItems to csan_DerivativeFinancialInstruments" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DerivativeFinancialAssets" xlink:label="ifrs-full_DerivativeFinancialAssets" xlink:title="ifrs-full_DerivativeFinancialAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:to="ifrs-full_DerivativeFinancialAssets" xlink:title="Definition : ifrs-full_DisclosureOfFinancialInstrumentsLineItems to ifrs-full_DerivativeFinancialAssets" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DerivativeFinancialLiabilities" xlink:label="ifrs-full_DerivativeFinancialLiabilities" xlink:title="ifrs-full_DerivativeFinancialLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:to="ifrs-full_DerivativeFinancialLiabilities" xlink:title="Definition : ifrs-full_DisclosureOfFinancialInstrumentsLineItems to ifrs-full_DerivativeFinancialLiabilities" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NotionalAmount" xlink:label="ifrs-full_NotionalAmount" xlink:title="ifrs-full_NotionalAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:to="ifrs-full_NotionalAmount" xlink:title="Definition : ifrs-full_DisclosureOfFinancialInstrumentsLineItems to ifrs-full_NotionalAmount" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FairValueOfDerivativeFinancialAssetsLiability" xlink:label="csan_FairValueOfDerivativeFinancialAssetsLiability" xlink:title="csan_FairValueOfDerivativeFinancialAssetsLiability"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:to="csan_FairValueOfDerivativeFinancialAssetsLiability" xlink:title="Definition : ifrs-full_DisclosureOfFinancialInstrumentsLineItems to csan_FairValueOfDerivativeFinancialAssetsLiability" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:title="ifrs-full_DisclosureOfFinancialInstrumentsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:to="ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:title="Definition : ifrs-full_DisclosureOfFinancialInstrumentsLineItems to ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:type="arc" use="optional" order="5" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgedItemsAxis" xlink:label="ifrs-full_HedgedItemsAxis" xlink:title="ifrs-full_HedgedItemsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:to="ifrs-full_HedgedItemsAxis" xlink:title="Definition : ifrs-full_DisclosureOfFinancialInstrumentsTable to ifrs-full_HedgedItemsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgedItemsMember" xlink:label="ifrs-full_HedgedItemsMember" xlink:title="ifrs-full_HedgedItemsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_HedgedItemsAxis" xlink:to="ifrs-full_HedgedItemsMember" xlink:title="Definition : ifrs-full_HedgedItemsAxis to ifrs-full_HedgedItemsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ElectricityDerivativesMember" xlink:label="csan_ElectricityDerivativesMember" xlink:title="csan_ElectricityDerivativesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgedItemsMember" xlink:to="csan_ElectricityDerivativesMember" xlink:title="Definition : ifrs-full_HedgedItemsMember to csan_ElectricityDerivativesMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ExchangeRateDerivativesMember" xlink:label="csan_ExchangeRateDerivativesMember" xlink:title="csan_ExchangeRateDerivativesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgedItemsMember" xlink:to="csan_ExchangeRateDerivativesMember" xlink:title="Definition : ifrs-full_HedgedItemsMember to csan_ExchangeRateDerivativesMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_InterestRateAndExchangeRateRiskMember" xlink:label="csan_InterestRateAndExchangeRateRiskMember" xlink:title="csan_InterestRateAndExchangeRateRiskMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgedItemsMember" xlink:to="csan_InterestRateAndExchangeRateRiskMember" xlink:title="Definition : ifrs-full_HedgedItemsMember to csan_InterestRateAndExchangeRateRiskMember" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgedItemsMember" xlink:label="ifrs-full_HedgedItemsMember_1" xlink:title="ifrs-full_HedgedItemsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_HedgedItemsAxis" xlink:to="ifrs-full_HedgedItemsMember_1" xlink:title="Definition : ifrs-full_HedgedItemsAxis to ifrs-full_HedgedItemsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsAxis" xlink:label="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:title="ifrs-full_ClassesOfFinancialAssetsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:to="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:title="Definition : ifrs-full_DisclosureOfFinancialInstrumentsTable to ifrs-full_ClassesOfFinancialAssetsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsMember" xlink:label="ifrs-full_FinancialAssetsMember" xlink:title="ifrs-full_FinancialAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialAssetsAxis to ifrs-full_FinancialAssetsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ForwardContractMember" xlink:label="ifrs-full_ForwardContractMember" xlink:title="ifrs-full_ForwardContractMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="ifrs-full_ForwardContractMember" xlink:title="Definition : ifrs-full_FinancialAssetsMember to ifrs-full_ForwardContractMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CommodityForwardContractMember" xlink:label="csan_CommodityForwardContractMember" xlink:title="csan_CommodityForwardContractMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="csan_CommodityForwardContractMember" xlink:title="Definition : ifrs-full_FinancialAssetsMember to csan_CommodityForwardContractMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SwapContractForSharesMember" xlink:label="csan_SwapContractForSharesMember" xlink:title="csan_SwapContractForSharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="csan_SwapContractForSharesMember" xlink:title="Definition : ifrs-full_FinancialAssetsMember to csan_SwapContractForSharesMember" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_InflationAndInterestRateSwapContractMember" xlink:label="csan_InflationAndInterestRateSwapContractMember" xlink:title="csan_InflationAndInterestRateSwapContractMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="csan_InflationAndInterestRateSwapContractMember" xlink:title="Definition : ifrs-full_FinancialAssetsMember to csan_InflationAndInterestRateSwapContractMember" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateSwapContractMember" xlink:label="ifrs-full_InterestRateSwapContractMember" xlink:title="ifrs-full_InterestRateSwapContractMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="ifrs-full_InterestRateSwapContractMember" xlink:title="Definition : ifrs-full_FinancialAssetsMember to ifrs-full_InterestRateSwapContractMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ExchangeAndInterestRateSwapContractMember" xlink:label="csan_ExchangeAndInterestRateSwapContractMember" xlink:title="csan_ExchangeAndInterestRateSwapContractMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="csan_ExchangeAndInterestRateSwapContractMember" xlink:title="Definition : ifrs-full_FinancialAssetsMember to csan_ExchangeAndInterestRateSwapContractMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsMember" xlink:label="ifrs-full_FinancialAssetsMember_1" xlink:title="ifrs-full_FinancialAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsMember_1" xlink:title="Definition : ifrs-full_ClassesOfFinancialAssetsAxis to ifrs-full_FinancialAssetsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MeasurementAxis" xlink:label="ifrs-full_MeasurementAxis" xlink:title="ifrs-full_MeasurementAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:to="ifrs-full_MeasurementAxis" xlink:title="Definition : ifrs-full_DisclosureOfFinancialInstrumentsTable to ifrs-full_MeasurementAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedMeasurementMember" xlink:label="ifrs-full_AggregatedMeasurementMember" xlink:title="ifrs-full_AggregatedMeasurementMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_MeasurementAxis" xlink:to="ifrs-full_AggregatedMeasurementMember" xlink:title="Definition : ifrs-full_MeasurementAxis to ifrs-full_AggregatedMeasurementMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AtFairValueMember" xlink:label="ifrs-full_AtFairValueMember" xlink:title="ifrs-full_AtFairValueMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedMeasurementMember" xlink:to="ifrs-full_AtFairValueMember" xlink:title="Definition : ifrs-full_AggregatedMeasurementMember to ifrs-full_AtFairValueMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedMeasurementMember" xlink:label="ifrs-full_AggregatedMeasurementMember_1" xlink:title="ifrs-full_AggregatedMeasurementMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_MeasurementAxis" xlink:to="ifrs-full_AggregatedMeasurementMember_1" xlink:title="Definition : ifrs-full_MeasurementAxis to ifrs-full_AggregatedMeasurementMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfMovementOfTheObligationWithPreferredShareholdersDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfMovementObligationWithPreferredShareholdersLineItems" xlink:label="csan_DisclosureOfMovementObligationWithPreferredShareholdersLineItems" xlink:title="csan_DisclosureOfMovementObligationWithPreferredShareholdersLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfMovementObligationWithPreferredShareholdersTable" xlink:label="csan_DisclosureOfMovementObligationWithPreferredShareholdersTable" xlink:title="csan_DisclosureOfMovementObligationWithPreferredShareholdersTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfMovementObligationWithPreferredShareholdersLineItems" xlink:to="csan_DisclosureOfMovementObligationWithPreferredShareholdersTable" xlink:title="Definition : csan_DisclosureOfMovementObligationWithPreferredShareholdersLineItems to csan_DisclosureOfMovementObligationWithPreferredShareholdersTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PreferredShareholdersPayableSubsidiariesNonCurrent" xlink:label="csan_PreferredShareholdersPayableSubsidiariesNonCurrent" xlink:title="csan_PreferredShareholdersPayableSubsidiariesNonCurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfMovementObligationWithPreferredShareholdersLineItems" xlink:to="csan_PreferredShareholdersPayableSubsidiariesNonCurrent" xlink:title="Definition : csan_DisclosureOfMovementObligationWithPreferredShareholdersLineItems to csan_PreferredShareholdersPayableSubsidiariesNonCurrent" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PreferredShareHoldersDividendDistribution" xlink:label="csan_PreferredShareHoldersDividendDistribution" xlink:title="csan_PreferredShareHoldersDividendDistribution"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfMovementObligationWithPreferredShareholdersLineItems" xlink:to="csan_PreferredShareHoldersDividendDistribution" xlink:title="Definition : csan_DisclosureOfMovementObligationWithPreferredShareholdersLineItems to csan_PreferredShareHoldersDividendDistribution" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PreferredShareHoldersMonetaryVariation" xlink:label="csan_PreferredShareHoldersMonetaryVariation" xlink:title="csan_PreferredShareHoldersMonetaryVariation"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfMovementObligationWithPreferredShareholdersLineItems" xlink:to="csan_PreferredShareHoldersMonetaryVariation" xlink:title="Definition : csan_DisclosureOfMovementObligationWithPreferredShareholdersLineItems to csan_PreferredShareHoldersMonetaryVariation" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:title="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:title="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:title="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable to ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SharebasedPaymentArrangementsMember" xlink:label="ifrs-full_SharebasedPaymentArrangementsMember" xlink:title="ifrs-full_SharebasedPaymentArrangementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_SharebasedPaymentArrangementsMember" xlink:title="Definition : ifrs-full_TypesOfSharebasedPaymentArrangementsAxis to ifrs-full_SharebasedPaymentArrangementsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AugusteighteentwothousandeleventwoMember" xlink:label="csan_AugusteighteentwothousandeleventwoMember" xlink:title="csan_AugusteighteentwothousandeleventwoMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SharebasedPaymentArrangementsMember" xlink:to="csan_AugusteighteentwothousandeleventwoMember" xlink:title="Definition : ifrs-full_SharebasedPaymentArrangementsMember to csan_AugusteighteentwothousandeleventwoMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SharebasedPaymentArrangementsMember" xlink:label="ifrs-full_SharebasedPaymentArrangementsMember_1" xlink:title="ifrs-full_SharebasedPaymentArrangementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_SharebasedPaymentArrangementsMember_1" xlink:title="Definition : ifrs-full_TypesOfSharebasedPaymentArrangementsAxis to ifrs-full_SharebasedPaymentArrangementsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MemberTypeAxis" xlink:label="csan_MemberTypeAxis" xlink:title="csan_MemberTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="csan_MemberTypeAxis" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable to csan_MemberTypeAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MemberTypeMember" xlink:label="csan_MemberTypeMember" xlink:title="csan_MemberTypeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_MemberTypeAxis" xlink:to="csan_MemberTypeMember" xlink:title="Definition : csan_MemberTypeAxis to csan_MemberTypeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NewMembersMember" xlink:label="csan_NewMembersMember" xlink:title="csan_NewMembersMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_MemberTypeMember" xlink:to="csan_NewMembersMember" xlink:title="Definition : csan_MemberTypeMember to csan_NewMembersMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ExistingMembersMember" xlink:label="csan_ExistingMembersMember" xlink:title="csan_ExistingMembersMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_MemberTypeMember" xlink:to="csan_ExistingMembersMember" xlink:title="Definition : csan_MemberTypeMember to csan_ExistingMembersMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MemberTypeMember" xlink:label="csan_MemberTypeMember_1" xlink:title="csan_MemberTypeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_MemberTypeAxis" xlink:to="csan_MemberTypeMember_1" xlink:title="Definition : csan_MemberTypeAxis to csan_MemberTypeMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfSharesSettledInStockOptionPlan" xlink:label="csan_NumberOfSharesSettledInStockOptionPlan" xlink:title="csan_NumberOfSharesSettledInStockOptionPlan"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="csan_NumberOfSharesSettledInStockOptionPlan" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to csan_NumberOfSharesSettledInStockOptionPlan" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfSharesDeliveredInStockOptionPlan" xlink:label="csan_NumberOfSharesDeliveredInStockOptionPlan" xlink:title="csan_NumberOfSharesDeliveredInStockOptionPlan"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="csan_NumberOfSharesDeliveredInStockOptionPlan" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to csan_NumberOfSharesDeliveredInStockOptionPlan" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ValueOfSharesSettledInStockOptionPlan" xlink:label="csan_ValueOfSharesSettledInStockOptionPlan" xlink:title="csan_ValueOfSharesSettledInStockOptionPlan"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="csan_ValueOfSharesSettledInStockOptionPlan" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to csan_ValueOfSharesSettledInStockOptionPlan" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ValueOfSharesDeliveredInStockOptionPlan" xlink:label="csan_ValueOfSharesDeliveredInStockOptionPlan" xlink:title="csan_ValueOfSharesDeliveredInStockOptionPlan"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="csan_ValueOfSharesDeliveredInStockOptionPlan" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to csan_ValueOfSharesDeliveredInStockOptionPlan" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement" xlink:label="ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement" xlink:title="ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfCarryingAmountsAndFairValueOfFinancialAssetsAndFinancialLiabilitiesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:title="ifrs-full_DisclosureOfFinancialInstrumentsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:title="ifrs-full_DisclosureOfFinancialInstrumentsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:to="ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:title="Definition : ifrs-full_DisclosureOfFinancialInstrumentsLineItems to ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:label="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:title="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:to="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:title="Definition : ifrs-full_DisclosureOfFinancialInstrumentsTable to ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember" xlink:title="ifrs-full_CarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember" xlink:title="Definition : ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis to ifrs-full_CarryingAmountMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AtFairValueMember" xlink:label="ifrs-full_AtFairValueMember" xlink:title="ifrs-full_AtFairValueMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_AtFairValueMember" xlink:title="Definition : ifrs-full_CarryingAmountMember to ifrs-full_AtFairValueMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GrossCarryingAmountMember" xlink:label="ifrs-full_GrossCarryingAmountMember" xlink:title="ifrs-full_GrossCarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_GrossCarryingAmountMember" xlink:title="Definition : ifrs-full_CarryingAmountMember to ifrs-full_GrossCarryingAmountMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember_1" xlink:title="ifrs-full_CarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember_1" xlink:title="Definition : ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis to ifrs-full_CarryingAmountMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:title="Definition : ifrs-full_DisclosureOfFinancialInstrumentsTable to ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsAxis to ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DerivativeFinancialInstrumentsMember" xlink:label="csan_DerivativeFinancialInstrumentsMember" xlink:title="csan_DerivativeFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_DerivativeFinancialInstrumentsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_DerivativeFinancialInstrumentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_InvestmentFundMember" xlink:label="csan_InvestmentFundMember" xlink:title="csan_InvestmentFundMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_InvestmentFundMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_InvestmentFundMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LoansBorrowingsAndDebenturesMember" xlink:label="csan_LoansBorrowingsAndDebenturesMember" xlink:title="csan_LoansBorrowingsAndDebenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_LoansBorrowingsAndDebenturesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_LoansBorrowingsAndDebenturesMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MarketableSecuritiesMember" xlink:label="csan_MarketableSecuritiesMember" xlink:title="csan_MarketableSecuritiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_MarketableSecuritiesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_MarketableSecuritiesMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherFinancialAssetsMember" xlink:label="csan_OtherFinancialAssetsMember" xlink:title="csan_OtherFinancialAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_OtherFinancialAssetsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_OtherFinancialAssetsMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContingentConsiderationMember" xlink:label="ifrs-full_ContingentConsiderationMember" xlink:title="ifrs-full_ContingentConsiderationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="ifrs-full_ContingentConsiderationMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to ifrs-full_ContingentConsiderationMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember_1" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember_1" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsAxis to ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:label="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:title="ifrs-full_LevelsOfFairValueHierarchyAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:to="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:title="Definition : ifrs-full_DisclosureOfFinancialInstrumentsTable to ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:label="ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:title="ifrs-full_AllLevelsOfFairValueHierarchyMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:to="ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:title="Definition : ifrs-full_LevelsOfFairValueHierarchyAxis to ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Level2OfFairValueHierarchyMember" xlink:label="ifrs-full_Level2OfFairValueHierarchyMember" xlink:title="ifrs-full_Level2OfFairValueHierarchyMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:to="ifrs-full_Level2OfFairValueHierarchyMember" xlink:title="Definition : ifrs-full_AllLevelsOfFairValueHierarchyMember to ifrs-full_Level2OfFairValueHierarchyMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Level3OfFairValueHierarchyMember" xlink:label="ifrs-full_Level3OfFairValueHierarchyMember" xlink:title="ifrs-full_Level3OfFairValueHierarchyMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:to="ifrs-full_Level3OfFairValueHierarchyMember" xlink:title="Definition : ifrs-full_AllLevelsOfFairValueHierarchyMember to ifrs-full_Level3OfFairValueHierarchyMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Level1OfFairValueHierarchyMember" xlink:label="ifrs-full_Level1OfFairValueHierarchyMember" xlink:title="ifrs-full_Level1OfFairValueHierarchyMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:to="ifrs-full_Level1OfFairValueHierarchyMember" xlink:title="Definition : ifrs-full_AllLevelsOfFairValueHierarchyMember to ifrs-full_Level1OfFairValueHierarchyMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:label="ifrs-full_AllLevelsOfFairValueHierarchyMember_1" xlink:title="ifrs-full_AllLevelsOfFairValueHierarchyMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:to="ifrs-full_AllLevelsOfFairValueHierarchyMember_1" xlink:title="Definition : ifrs-full_LevelsOfFairValueHierarchyAxis to ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssets" xlink:label="ifrs-full_FinancialAssets" xlink:title="ifrs-full_FinancialAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:to="ifrs-full_FinancialAssets" xlink:title="Definition : ifrs-full_DisclosureOfFinancialInstrumentsLineItems to ifrs-full_FinancialAssets" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialLiabilities" xlink:label="ifrs-full_FinancialLiabilities" xlink:title="ifrs-full_FinancialLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:to="ifrs-full_FinancialLiabilities" xlink:title="Definition : ifrs-full_DisclosureOfFinancialInstrumentsLineItems to ifrs-full_FinancialLiabilities" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
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| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfCarryingAmountsAndFairValueOfFinancialAssetsAndFinancialLiabilitiesParentheticalDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFairValueMeasurementOfAssetsLineItems" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementOfAssetsLineItems" xlink:title="ifrs-full_DisclosureOfFairValueMeasurementOfAssetsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DiscountRate" xlink:label="csan_DiscountRate" xlink:title="csan_DiscountRate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfAssetsLineItems" xlink:to="csan_DiscountRate" xlink:title="Definition : ifrs-full_DisclosureOfFairValueMeasurementOfAssetsLineItems to csan_DiscountRate" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFairValueOfPlanAssetsTable" xlink:label="ifrs-full_DisclosureOfFairValueOfPlanAssetsTable" xlink:title="ifrs-full_DisclosureOfFairValueOfPlanAssetsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfAssetsLineItems" xlink:to="ifrs-full_DisclosureOfFairValueOfPlanAssetsTable" xlink:title="Definition : ifrs-full_DisclosureOfFairValueMeasurementOfAssetsLineItems to ifrs-full_DisclosureOfFairValueOfPlanAssetsTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:label="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:title="ifrs-full_LevelsOfFairValueHierarchyAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfFairValueOfPlanAssetsTable" xlink:to="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:title="Definition : ifrs-full_DisclosureOfFairValueOfPlanAssetsTable to ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:label="ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:title="ifrs-full_AllLevelsOfFairValueHierarchyMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:to="ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:title="Definition : ifrs-full_LevelsOfFairValueHierarchyAxis to ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Level2OfFairValueHierarchyMember" xlink:label="ifrs-full_Level2OfFairValueHierarchyMember" xlink:title="ifrs-full_Level2OfFairValueHierarchyMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:to="ifrs-full_Level2OfFairValueHierarchyMember" xlink:title="Definition : ifrs-full_AllLevelsOfFairValueHierarchyMember to ifrs-full_Level2OfFairValueHierarchyMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Level3OfFairValueHierarchyMember" xlink:label="ifrs-full_Level3OfFairValueHierarchyMember" xlink:title="ifrs-full_Level3OfFairValueHierarchyMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:to="ifrs-full_Level3OfFairValueHierarchyMember" xlink:title="Definition : ifrs-full_AllLevelsOfFairValueHierarchyMember to ifrs-full_Level3OfFairValueHierarchyMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:label="ifrs-full_AllLevelsOfFairValueHierarchyMember_1" xlink:title="ifrs-full_AllLevelsOfFairValueHierarchyMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:to="ifrs-full_AllLevelsOfFairValueHierarchyMember_1" xlink:title="Definition : ifrs-full_LevelsOfFairValueHierarchyAxis to ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfFairValueOfPlanAssetsTable" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:title="Definition : ifrs-full_DisclosureOfFairValueOfPlanAssetsTable to ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsAxis to ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ExxonMobilMember" xlink:label="csan_ExxonMobilMember" xlink:title="csan_ExxonMobilMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_ExxonMobilMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_ExxonMobilMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContingentConsiderationMember" xlink:label="ifrs-full_ContingentConsiderationMember" xlink:title="ifrs-full_ContingentConsiderationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="ifrs-full_ContingentConsiderationMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to ifrs-full_ContingentConsiderationMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember_1" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember_1" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsAxis to ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ConsiderationPayableRelatedToIntangibleAsset" xlink:label="csan_ConsiderationPayableRelatedToIntangibleAsset" xlink:title="csan_ConsiderationPayableRelatedToIntangibleAsset"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfAssetsLineItems" xlink:to="csan_ConsiderationPayableRelatedToIntangibleAsset" xlink:title="Definition : ifrs-full_DisclosureOfFairValueMeasurementOfAssetsLineItems to csan_ConsiderationPayableRelatedToIntangibleAsset" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
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| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/OtherTaxReceivablesSummaryofOtherTaxReceivablesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TradeAndOtherCurrentReceivablesLineItems" xlink:label="csan_TradeAndOtherCurrentReceivablesLineItems" xlink:title="csan_TradeAndOtherCurrentReceivablesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentReceivablesFromTaxesOtherThanIncomeTax" xlink:label="ifrs-full_CurrentReceivablesFromTaxesOtherThanIncomeTax" xlink:title="ifrs-full_CurrentReceivablesFromTaxesOtherThanIncomeTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_TradeAndOtherCurrentReceivablesLineItems" xlink:to="ifrs-full_CurrentReceivablesFromTaxesOtherThanIncomeTax" xlink:title="Definition : csan_TradeAndOtherCurrentReceivablesLineItems to ifrs-full_CurrentReceivablesFromTaxesOtherThanIncomeTax" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentReceivablesFromTaxesOtherThanIncomeTax" xlink:label="ifrs-full_NoncurrentReceivablesFromTaxesOtherThanIncomeTax" xlink:title="ifrs-full_NoncurrentReceivablesFromTaxesOtherThanIncomeTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_TradeAndOtherCurrentReceivablesLineItems" xlink:to="ifrs-full_NoncurrentReceivablesFromTaxesOtherThanIncomeTax" xlink:title="Definition : csan_TradeAndOtherCurrentReceivablesLineItems to ifrs-full_NoncurrentReceivablesFromTaxesOtherThanIncomeTax" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ReceivablesFromTaxesOtherThanIncomeTax" xlink:label="ifrs-full_ReceivablesFromTaxesOtherThanIncomeTax" xlink:title="ifrs-full_ReceivablesFromTaxesOtherThanIncomeTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_TradeAndOtherCurrentReceivablesLineItems" xlink:to="ifrs-full_ReceivablesFromTaxesOtherThanIncomeTax" xlink:title="Definition : csan_TradeAndOtherCurrentReceivablesLineItems to ifrs-full_ReceivablesFromTaxesOtherThanIncomeTax" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TradeAndOtherCurrentReceivablesTable" xlink:label="csan_TradeAndOtherCurrentReceivablesTable" xlink:title="csan_TradeAndOtherCurrentReceivablesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_TradeAndOtherCurrentReceivablesLineItems" xlink:to="csan_TradeAndOtherCurrentReceivablesTable" xlink:title="Definition : csan_TradeAndOtherCurrentReceivablesLineItems to csan_TradeAndOtherCurrentReceivablesTable" xlink:type="arc" use="optional" order="3" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis" xlink:label="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis" xlink:title="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:label="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:title="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CofinsRevenueTaxMember" xlink:label="csan_CofinsRevenueTaxMember" xlink:title="csan_CofinsRevenueTaxMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CreditInstallmentMember" xlink:label="csan_CreditInstallmentMember" xlink:title="csan_CreditInstallmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_CreditInstallmentMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_CreditInstallmentMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ICMSCIAPTaxesMember" xlink:label="csan_ICMSCIAPTaxesMember" xlink:title="csan_ICMSCIAPTaxesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_ICMSCIAPTaxesMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_ICMSCIAPTaxesMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ICMSTaxesMember" xlink:label="csan_ICMSTaxesMember" xlink:title="csan_ICMSTaxesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_ICMSTaxesMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_ICMSTaxesMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherTaxesMember" xlink:label="csan_OtherTaxesMember" xlink:title="csan_OtherTaxesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_OtherTaxesMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_OtherTaxesMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PISRevenueTaxMember" xlink:label="csan_PISRevenueTaxMember" xlink:title="csan_PISRevenueTaxMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_PISRevenueTaxMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_PISRevenueTaxMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:label="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_1" xlink:title="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis" xlink:to="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_1" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis to ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/OtherTaxReceivablesSummaryOfOtherCurrentTaxReceivablesParentheticalDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TradeAndOtherCurrentReceivablesLineItems" xlink:label="csan_TradeAndOtherCurrentReceivablesLineItems" xlink:title="csan_TradeAndOtherCurrentReceivablesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncomeGrantFromJudicialPrecedent" xlink:label="csan_IncomeGrantFromJudicialPrecedent" xlink:title="csan_IncomeGrantFromJudicialPrecedent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_TradeAndOtherCurrentReceivablesLineItems" xlink:to="csan_IncomeGrantFromJudicialPrecedent" xlink:title="Definition : csan_TradeAndOtherCurrentReceivablesLineItems to csan_IncomeGrantFromJudicialPrecedent" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TradeAndOtherCurrentReceivablesTable" xlink:label="csan_TradeAndOtherCurrentReceivablesTable" xlink:title="csan_TradeAndOtherCurrentReceivablesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_TradeAndOtherCurrentReceivablesLineItems" xlink:to="csan_TradeAndOtherCurrentReceivablesTable" xlink:title="Definition : csan_TradeAndOtherCurrentReceivablesLineItems to csan_TradeAndOtherCurrentReceivablesTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_LitigationCaseAxis" xlink:label="srt_LitigationCaseAxis" xlink:title="srt_LitigationCaseAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_TradeAndOtherCurrentReceivablesTable" xlink:to="srt_LitigationCaseAxis" xlink:title="Definition : csan_TradeAndOtherCurrentReceivablesTable to srt_LitigationCaseAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_LitigationCaseTypeDomain" xlink:label="srt_LitigationCaseTypeDomain" xlink:title="srt_LitigationCaseTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_LitigationCaseAxis" xlink:to="srt_LitigationCaseTypeDomain" xlink:title="Definition : srt_LitigationCaseAxis to srt_LitigationCaseTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FederalSupremeCourtMember" xlink:label="csan_FederalSupremeCourtMember" xlink:title="csan_FederalSupremeCourtMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_LitigationCaseTypeDomain" xlink:to="csan_FederalSupremeCourtMember" xlink:title="Definition : srt_LitigationCaseTypeDomain to csan_FederalSupremeCourtMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_LitigationCaseTypeDomain" xlink:label="srt_LitigationCaseTypeDomain_1" xlink:title="srt_LitigationCaseTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_LitigationCaseAxis" xlink:to="srt_LitigationCaseTypeDomain_1" xlink:title="Definition : srt_LitigationCaseAxis to srt_LitigationCaseTypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/InvestmentsInAssociatesSummaryOfInformationInAssociatesOfCompanyAndCompanysOwnershipDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfAssociatesAndJointVenturesLineItems" xlink:label="csan_DisclosureOfAssociatesAndJointVenturesLineItems" xlink:title="csan_DisclosureOfAssociatesAndJointVenturesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:label="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:title="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfAssociatesAndJointVenturesLineItems" xlink:to="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:title="Definition : csan_DisclosureOfAssociatesAndJointVenturesLineItems to ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="ifrs-full_CategoriesOfRelatedPartiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="Definition : ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable to ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AssociatesMember" xlink:label="ifrs-full_AssociatesMember" xlink:title="ifrs-full_AssociatesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="ifrs-full_AssociatesMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to ifrs-full_AssociatesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:title="dei_LegalEntityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:to="dei_LegalEntityAxis" xlink:title="Definition : ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable to dei_LegalEntityAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLogisticaSAMember" xlink:label="csan_CosanLogisticaSAMember" xlink:title="csan_CosanLogisticaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_CosanLogisticaSAMember" xlink:title="Definition : dei_EntityDomain to csan_CosanLogisticaSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAMember" xlink:label="csan_CosanSAMember" xlink:title="csan_CosanSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_CosanSAMember" xlink:title="Definition : dei_EntityDomain to csan_CosanSAMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLimitedPartnersBrasilConsultoriaLtdaMember" xlink:label="csan_CosanLimitedPartnersBrasilConsultoriaLtdaMember" xlink:title="csan_CosanLimitedPartnersBrasilConsultoriaLtdaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_CosanLimitedPartnersBrasilConsultoriaLtdaMember" xlink:title="Definition : dei_EntityDomain to csan_CosanLimitedPartnersBrasilConsultoriaLtdaMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SinlogTecnologiaEmLogsticaSaMember" xlink:label="csan_SinlogTecnologiaEmLogsticaSaMember" xlink:title="csan_SinlogTecnologiaEmLogsticaSaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_SinlogTecnologiaEmLogsticaSaMember" xlink:title="Definition : dei_EntityDomain to csan_SinlogTecnologiaEmLogsticaSaMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain_1" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain_1" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:label="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:title="ifrs-full_SignificantInvestmentsInAssociatesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:to="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:title="Definition : ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable to ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember" xlink:title="ifrs-full_EntitysTotalForAssociatesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInAssociatesAxis to ifrs-full_EntitysTotalForAssociatesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_JanusBrasilParticipacoesSAMember" xlink:label="csan_JanusBrasilParticipacoesSAMember" xlink:title="csan_JanusBrasilParticipacoesSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="csan_JanusBrasilParticipacoesSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForAssociatesMember to csan_JanusBrasilParticipacoesSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NovviLimitedLiabilityCompanyMember" xlink:label="csan_NovviLimitedLiabilityCompanyMember" xlink:title="csan_NovviLimitedLiabilityCompanyMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="csan_NovviLimitedLiabilityCompanyMember" xlink:title="Definition : ifrs-full_EntitysTotalForAssociatesMember to csan_NovviLimitedLiabilityCompanyMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherInvestmentsMember" xlink:label="csan_OtherInvestmentsMember" xlink:title="csan_OtherInvestmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="csan_OtherInvestmentsMember" xlink:title="Definition : ifrs-full_EntitysTotalForAssociatesMember to csan_OtherInvestmentsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RadarIIPropriedadesAgricolasSAMember" xlink:label="csan_RadarIIPropriedadesAgricolasSAMember" xlink:title="csan_RadarIIPropriedadesAgricolasSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="csan_RadarIIPropriedadesAgricolasSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForAssociatesMember to csan_RadarIIPropriedadesAgricolasSAMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RadarPropriedadesAgricolasSAMember" xlink:label="csan_RadarPropriedadesAgricolasSAMember" xlink:title="csan_RadarPropriedadesAgricolasSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="csan_RadarPropriedadesAgricolasSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForAssociatesMember to csan_RadarPropriedadesAgricolasSAMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TellusBrasilParticipacoesSAMember" xlink:label="csan_TellusBrasilParticipacoesSAMember" xlink:title="csan_TellusBrasilParticipacoesSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="csan_TellusBrasilParticipacoesSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForAssociatesMember to csan_TellusBrasilParticipacoesSAMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_UsinaSantaLuizaSAMember" xlink:label="csan_UsinaSantaLuizaSAMember" xlink:title="csan_UsinaSantaLuizaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="csan_UsinaSantaLuizaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForAssociatesMember to csan_UsinaSantaLuizaSAMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_InterestOfCosanLogisticaSaMember" xlink:label="csan_InterestOfCosanLogisticaSaMember" xlink:title="csan_InterestOfCosanLogisticaSaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="csan_InterestOfCosanLogisticaSaMember" xlink:title="Definition : ifrs-full_EntitysTotalForAssociatesMember to csan_InterestOfCosanLogisticaSaMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember_1" xlink:title="ifrs-full_EntitysTotalForAssociatesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInAssociatesAxis to ifrs-full_EntitysTotalForAssociatesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AirportEnergyLimitedMember" xlink:label="csan_AirportEnergyLimitedMember" xlink:title="csan_AirportEnergyLimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_AirportEnergyLimitedMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_AirportEnergyLimitedMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AirportEnergyServicesLimitedMember" xlink:label="csan_AirportEnergyServicesLimitedMember" xlink:title="csan_AirportEnergyServicesLimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_AirportEnergyServicesLimitedMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_AirportEnergyServicesLimitedMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ALLArgentinaSAMember" xlink:label="csan_ALLArgentinaSAMember" xlink:title="csan_ALLArgentinaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ALLArgentinaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ALLArgentinaSAMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ALLArmazensGeraisLtdaMember" xlink:label="csan_ALLArmazensGeraisLtdaMember" xlink:title="csan_ALLArmazensGeraisLtdaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ALLArmazensGeraisLtdaMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ALLArmazensGeraisLtdaMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ALLCentralSAMember" xlink:label="csan_ALLCentralSAMember" xlink:title="csan_ALLCentralSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ALLCentralSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ALLCentralSAMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ALLMesopotamicaSAMember" xlink:label="csan_ALLMesopotamicaSAMember" xlink:title="csan_ALLMesopotamicaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ALLMesopotamicaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ALLMesopotamicaSAMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BoswellsSAMember" xlink:label="csan_BoswellsSAMember" xlink:title="csan_BoswellsSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_BoswellsSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_BoswellsSAMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BradoLogisticaeParticipacoesSAMember" xlink:label="csan_BradoLogisticaeParticipacoesSAMember" xlink:title="csan_BradoLogisticaeParticipacoesSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_BradoLogisticaeParticipacoesSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_BradoLogisticaeParticipacoesSAMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BradoLogisticaSAMember" xlink:label="csan_BradoLogisticaSAMember" xlink:title="csan_BradoLogisticaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_BradoLogisticaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_BradoLogisticaSAMember" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanBiomassaSAMember" xlink:label="csan_CosanBiomassaSAMember" xlink:title="csan_CosanBiomassaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanBiomassaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanBiomassaSAMember" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanCaymanIILimitedMember" xlink:label="csan_CosanCaymanIILimitedMember" xlink:title="csan_CosanCaymanIILimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanCaymanIILimitedMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanCaymanIILimitedMember" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanGlobalLimitedMember" xlink:label="csan_CosanGlobalLimitedMember" xlink:title="csan_CosanGlobalLimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanGlobalLimitedMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanGlobalLimitedMember" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanInvestimentoseParticipacoesSAMember" xlink:label="csan_CosanInvestimentoseParticipacoesSAMember" xlink:title="csan_CosanInvestimentoseParticipacoesSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanInvestimentoseParticipacoesSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanInvestimentoseParticipacoesSAMember" xlink:type="arc" use="optional" order="12" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLubesInvestmentsLimitedMember" xlink:label="csan_CosanLubesInvestmentsLimitedMember" xlink:title="csan_CosanLubesInvestmentsLimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanLubesInvestmentsLimitedMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanLubesInvestmentsLimitedMember" xlink:type="arc" use="optional" order="13" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLubrificanteseEspecialidadesSAMember" xlink:label="csan_CosanLubrificanteseEspecialidadesSAMember" xlink:title="csan_CosanLubrificanteseEspecialidadesSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanLubrificanteseEspecialidadesSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanLubrificanteseEspecialidadesSAMember" xlink:type="arc" use="optional" order="14" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLubrificantesSRLMember" xlink:label="csan_CosanLubrificantesSRLMember" xlink:title="csan_CosanLubrificantesSRLMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanLubrificantesSRLMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanLubrificantesSRLMember" xlink:type="arc" use="optional" order="15" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLuxembourgSAMember" xlink:label="csan_CosanLuxembourgSAMember" xlink:title="csan_CosanLuxembourgSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanLuxembourgSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanLuxembourgSAMember" xlink:type="arc" use="optional" order="16" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanOverseasLimitedMember" xlink:label="csan_CosanOverseasLimitedMember" xlink:title="csan_CosanOverseasLimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanOverseasLimitedMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanOverseasLimitedMember" xlink:type="arc" use="optional" order="17" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanParaguaySAMember" xlink:label="csan_CosanParaguaySAMember" xlink:title="csan_CosanParaguaySAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanParaguaySAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanParaguaySAMember" xlink:type="arc" use="optional" order="18" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanUSIncMember" xlink:label="csan_CosanUSIncMember" xlink:title="csan_CosanUSIncMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanUSIncMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanUSIncMember" xlink:type="arc" use="optional" order="19" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ElevacoesPortuariasSAMember" xlink:label="csan_ElevacoesPortuariasSAMember" xlink:title="csan_ElevacoesPortuariasSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ElevacoesPortuariasSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ElevacoesPortuariasSAMember" xlink:type="arc" use="optional" order="20" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IlhaTerminalDistribuicaoDeProdutosQuimicosMember" xlink:label="csan_IlhaTerminalDistribuicaoDeProdutosQuimicosMember" xlink:title="csan_IlhaTerminalDistribuicaoDeProdutosQuimicosMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_IlhaTerminalDistribuicaoDeProdutosQuimicosMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_IlhaTerminalDistribuicaoDeProdutosQuimicosMember" xlink:type="arc" use="optional" order="21" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LogispotArmazensGeraisSAMember" xlink:label="csan_LogispotArmazensGeraisSAMember" xlink:title="csan_LogispotArmazensGeraisSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_LogispotArmazensGeraisSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_LogispotArmazensGeraisSAMember" xlink:type="arc" use="optional" order="22" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LubrigrupoiiMember" xlink:label="csan_LubrigrupoiiMember" xlink:title="csan_LubrigrupoiiMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_LubrigrupoiiMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_LubrigrupoiiMember" xlink:type="arc" use="optional" order="23" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MooveLubricantsLimitedMember" xlink:label="csan_MooveLubricantsLimitedMember" xlink:title="csan_MooveLubricantsLimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_MooveLubricantsLimitedMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_MooveLubricantsLimitedMember" xlink:type="arc" use="optional" order="24" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ParanaguaSAMember" xlink:label="csan_ParanaguaSAMember" xlink:title="csan_ParanaguaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ParanaguaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ParanaguaSAMember" xlink:type="arc" use="optional" order="25" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PasadenaEmpreendimentoseParticipacoesSAMember" xlink:label="csan_PasadenaEmpreendimentoseParticipacoesSAMember" xlink:title="csan_PasadenaEmpreendimentoseParticipacoesSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_PasadenaEmpreendimentoseParticipacoesSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_PasadenaEmpreendimentoseParticipacoesSAMember" xlink:type="arc" use="optional" order="26" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PaylySolucoesDePagamentosSAMember" xlink:label="csan_PaylySolucoesDePagamentosSAMember" xlink:title="csan_PaylySolucoesDePagamentosSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_PaylySolucoesDePagamentosSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_PaylySolucoesDePagamentosSAMember" xlink:type="arc" use="optional" order="27" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PortoferLtdaMember" xlink:label="csan_PortoferLtdaMember" xlink:title="csan_PortoferLtdaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_PortoferLtdaMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_PortoferLtdaMember" xlink:type="arc" use="optional" order="28" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoIntermodalSAMember" xlink:label="csan_RumoIntermodalSAMember" xlink:title="csan_RumoIntermodalSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoIntermodalSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoIntermodalSAMember" xlink:type="arc" use="optional" order="29" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoLuxembourgSarlMember" xlink:label="csan_RumoLuxembourgSarlMember" xlink:title="csan_RumoLuxembourgSarlMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoLuxembourgSarlMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoLuxembourgSarlMember" xlink:type="arc" use="optional" order="30" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMalhaNorteSAMember" xlink:label="csan_RumoMalhaNorteSAMember" xlink:title="csan_RumoMalhaNorteSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMalhaNorteSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMalhaNorteSAMember" xlink:type="arc" use="optional" order="31" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMalhaOesteSAMember" xlink:label="csan_RumoMalhaOesteSAMember" xlink:title="csan_RumoMalhaOesteSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMalhaOesteSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMalhaOesteSAMember" xlink:type="arc" use="optional" order="32" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMalhaPaulistaSAMember" xlink:label="csan_RumoMalhaPaulistaSAMember" xlink:title="csan_RumoMalhaPaulistaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMalhaPaulistaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMalhaPaulistaSAMember" xlink:type="arc" use="optional" order="33" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMalhaSulSAMember" xlink:label="csan_RumoMalhaSulSAMember" xlink:title="csan_RumoMalhaSulSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMalhaSulSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMalhaSulSAMember" xlink:type="arc" use="optional" order="34" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoSAMember" xlink:label="csan_RumoSAMember" xlink:title="csan_RumoSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoSAMember" xlink:type="arc" use="optional" order="35" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ServiciosDeInversionLogisticaIntegralesSAMember" xlink:label="csan_ServiciosDeInversionLogisticaIntegralesSAMember" xlink:title="csan_ServiciosDeInversionLogisticaIntegralesSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ServiciosDeInversionLogisticaIntegralesSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ServiciosDeInversionLogisticaIntegralesSAMember" xlink:type="arc" use="optional" order="36" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StanbridgeGroupLimitedMember" xlink:label="csan_StanbridgeGroupLimitedMember" xlink:title="csan_StanbridgeGroupLimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_StanbridgeGroupLimitedMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_StanbridgeGroupLimitedMember" xlink:type="arc" use="optional" order="37" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TTAMember" xlink:label="csan_TTAMember" xlink:title="csan_TTAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_TTAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_TTAMember" xlink:type="arc" use="optional" order="38" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_WessesxPetroleumLimitedMember" xlink:label="csan_WessesxPetroleumLimitedMember" xlink:title="csan_WessesxPetroleumLimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_WessesxPetroleumLimitedMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_WessesxPetroleumLimitedMember" xlink:type="arc" use="optional" order="39" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ZipLubeSAMember" xlink:label="csan_ZipLubeSAMember" xlink:title="csan_ZipLubeSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ZipLubeSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ZipLubeSAMember" xlink:type="arc" use="optional" order="40" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DistribuidoraDeGasParticipacoesSAMember" xlink:label="csan_DistribuidoraDeGasParticipacoesSAMember" xlink:title="csan_DistribuidoraDeGasParticipacoesSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_DistribuidoraDeGasParticipacoesSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_DistribuidoraDeGasParticipacoesSAMember" xlink:type="arc" use="optional" order="41" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompanhiaDeGasDeSaoPauloComgasMember" xlink:label="csan_CompanhiaDeGasDeSaoPauloComgasMember" xlink:title="csan_CompanhiaDeGasDeSaoPauloComgasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CompanhiaDeGasDeSaoPauloComgasMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CompanhiaDeGasDeSaoPauloComgasMember" xlink:type="arc" use="optional" order="42" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanCincoSAMember" xlink:label="csan_CosanCincoSAMember" xlink:title="csan_CosanCincoSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanCincoSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanCincoSAMember" xlink:type="arc" use="optional" order="43" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CommercialLubricantsMooveCorpMember" xlink:label="csan_CommercialLubricantsMooveCorpMember" xlink:title="csan_CommercialLubricantsMooveCorpMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CommercialLubricantsMooveCorpMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CommercialLubricantsMooveCorpMember" xlink:type="arc" use="optional" order="44" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMalhaCentralSAMember" xlink:label="csan_RumoMalhaCentralSAMember" xlink:title="csan_RumoMalhaCentralSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMalhaCentralSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMalhaCentralSAMember" xlink:type="arc" use="optional" order="45" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompassGasEEnergiaSAMember" xlink:label="csan_CompassGasEEnergiaSAMember" xlink:title="csan_CompassGasEEnergiaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CompassGasEEnergiaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CompassGasEEnergiaSAMember" xlink:type="arc" order="46" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLubricantsEspanaSLUMember" xlink:label="csan_CosanLubricantsEspanaSLUMember" xlink:title="csan_CosanLubricantsEspanaSLUMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanLubricantsEspanaSLUMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanLubricantsEspanaSLUMember" xlink:type="arc" order="47" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CommaOilAndChemicalsMarketingSRLMember" xlink:label="csan_CommaOilAndChemicalsMarketingSRLMember" xlink:title="csan_CommaOilAndChemicalsMarketingSRLMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CommaOilAndChemicalsMarketingSRLMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CommaOilAndChemicalsMarketingSRLMember" xlink:type="arc" order="48" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CommaOtomotivYagVeKimyasallariMember" xlink:label="csan_CommaOtomotivYagVeKimyasallariMember" xlink:title="csan_CommaOtomotivYagVeKimyasallariMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CommaOtomotivYagVeKimyasallariMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CommaOtomotivYagVeKimyasallariMember" xlink:type="arc" order="49" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PazarlamaLimitedSirketiMember" xlink:label="csan_PazarlamaLimitedSirketiMember" xlink:title="csan_PazarlamaLimitedSirketiMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_PazarlamaLimitedSirketiMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_PazarlamaLimitedSirketiMember" xlink:type="arc" order="50" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CommaOilAndChemicalsMarketingBVMember" xlink:label="csan_CommaOilAndChemicalsMarketingBVMember" xlink:title="csan_CommaOilAndChemicalsMarketingBVMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CommaOilAndChemicalsMarketingBVMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CommaOilAndChemicalsMarketingBVMember" xlink:type="arc" order="51" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DividendsPaidToNoncontrollingInterests" xlink:label="ifrs-full_DividendsPaidToNoncontrollingInterests" xlink:title="ifrs-full_DividendsPaidToNoncontrollingInterests"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfAssociatesAndJointVenturesLineItems" xlink:to="ifrs-full_DividendsPaidToNoncontrollingInterests" xlink:title="Definition : csan_DisclosureOfAssociatesAndJointVenturesLineItems to ifrs-full_DividendsPaidToNoncontrollingInterests" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughAppropriationOfRetainedEarnings" xlink:label="ifrs-full_IncreaseDecreaseThroughAppropriationOfRetainedEarnings" xlink:title="ifrs-full_IncreaseDecreaseThroughAppropriationOfRetainedEarnings"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfAssociatesAndJointVenturesLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughAppropriationOfRetainedEarnings" xlink:title="Definition : csan_DisclosureOfAssociatesAndJointVenturesLineItems to ifrs-full_IncreaseDecreaseThroughAppropriationOfRetainedEarnings" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InvestmentsInAssociatesAccountedForUsingEquityMethod" xlink:label="ifrs-full_InvestmentsInAssociatesAccountedForUsingEquityMethod" xlink:title="ifrs-full_InvestmentsInAssociatesAccountedForUsingEquityMethod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfAssociatesAndJointVenturesLineItems" xlink:to="ifrs-full_InvestmentsInAssociatesAccountedForUsingEquityMethod" xlink:title="Definition : csan_DisclosureOfAssociatesAndJointVenturesLineItems to ifrs-full_InvestmentsInAssociatesAccountedForUsingEquityMethod" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfSharesHeldByParent" xlink:label="csan_NumberOfSharesHeldByParent" xlink:title="csan_NumberOfSharesHeldByParent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfAssociatesAndJointVenturesLineItems" xlink:to="csan_NumberOfSharesHeldByParent" xlink:title="Definition : csan_DisclosureOfAssociatesAndJointVenturesLineItems to csan_NumberOfSharesHeldByParent" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfSharesIssued" xlink:label="ifrs-full_NumberOfSharesIssued" xlink:title="ifrs-full_NumberOfSharesIssued"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfAssociatesAndJointVenturesLineItems" xlink:to="ifrs-full_NumberOfSharesIssued" xlink:title="Definition : csan_DisclosureOfAssociatesAndJointVenturesLineItems to ifrs-full_NumberOfSharesIssued" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ProportionOfEconomicBenefits" xlink:label="csan_ProportionOfEconomicBenefits" xlink:title="csan_ProportionOfEconomicBenefits"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfAssociatesAndJointVenturesLineItems" xlink:to="csan_ProportionOfEconomicBenefits" xlink:title="Definition : csan_DisclosureOfAssociatesAndJointVenturesLineItems to csan_ProportionOfEconomicBenefits" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:label="ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:title="ifrs-full_ProportionOfOwnershipInterestInAssociate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfAssociatesAndJointVenturesLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:title="Definition : csan_DisclosureOfAssociatesAndJointVenturesLineItems to ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:label="ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:title="ifrs-full_ProportionOfOwnershipInterestInSubsidiary"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfAssociatesAndJointVenturesLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:title="Definition : csan_DisclosureOfAssociatesAndJointVenturesLineItems to ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ShareOfComprehensiveIncomeOfAssociatesAccountedForUsingEquityMethod" xlink:label="csan_ShareOfComprehensiveIncomeOfAssociatesAccountedForUsingEquityMethod" xlink:title="csan_ShareOfComprehensiveIncomeOfAssociatesAccountedForUsingEquityMethod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfAssociatesAndJointVenturesLineItems" xlink:to="csan_ShareOfComprehensiveIncomeOfAssociatesAccountedForUsingEquityMethod" xlink:title="Definition : csan_DisclosureOfAssociatesAndJointVenturesLineItems to csan_ShareOfComprehensiveIncomeOfAssociatesAccountedForUsingEquityMethod" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod" xlink:label="ifrs-full_ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod" xlink:title="ifrs-full_ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfAssociatesAndJointVenturesLineItems" xlink:to="ifrs-full_ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod" xlink:title="Definition : csan_DisclosureOfAssociatesAndJointVenturesLineItems to ifrs-full_ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SalesOrPurchaseOfInterestsInAssociates" xlink:label="csan_SalesOrPurchaseOfInterestsInAssociates" xlink:title="csan_SalesOrPurchaseOfInterestsInAssociates"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfAssociatesAndJointVenturesLineItems" xlink:to="csan_SalesOrPurchaseOfInterestsInAssociates" xlink:title="Definition : csan_DisclosureOfAssociatesAndJointVenturesLineItems to csan_SalesOrPurchaseOfInterestsInAssociates" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherTransactionsInAssociates" xlink:label="csan_OtherTransactionsInAssociates" xlink:title="csan_OtherTransactionsInAssociates"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfAssociatesAndJointVenturesLineItems" xlink:to="csan_OtherTransactionsInAssociates" xlink:title="Definition : csan_DisclosureOfAssociatesAndJointVenturesLineItems to csan_OtherTransactionsInAssociates" xlink:type="arc" use="optional" order="12" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/InvestmentsInAssociatesSummaryOfInformationInAssociatesOfCompanyAndCompanysOwnershipParentheticalDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems" xlink:label="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems" xlink:title="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:label="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:title="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems" xlink:to="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:title="Definition : ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems to ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SinlogTecnologiaEmLogsticaMember" xlink:label="csan_SinlogTecnologiaEmLogsticaMember" xlink:title="csan_SinlogTecnologiaEmLogsticaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_SinlogTecnologiaEmLogsticaMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_SinlogTecnologiaEmLogsticaMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMember" xlink:label="csan_RumoMember" xlink:title="csan_RumoMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PaylySolucoesDePagamentosSAMember" xlink:label="csan_PaylySolucoesDePagamentosSAMember" xlink:title="csan_PaylySolucoesDePagamentosSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_PaylySolucoesDePagamentosSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_PaylySolucoesDePagamentosSAMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EquityPercentSold" xlink:label="csan_EquityPercentSold" xlink:title="csan_EquityPercentSold"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems" xlink:to="csan_EquityPercentSold" xlink:title="Definition : ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems to csan_EquityPercentSold" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProceedsFromChangesInOwnershipInterestsInSubsidiaries" xlink:label="ifrs-full_ProceedsFromChangesInOwnershipInterestsInSubsidiaries" xlink:title="ifrs-full_ProceedsFromChangesInOwnershipInterestsInSubsidiaries"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems" xlink:to="ifrs-full_ProceedsFromChangesInOwnershipInterestsInSubsidiaries" xlink:title="Definition : ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems to ifrs-full_ProceedsFromChangesInOwnershipInterestsInSubsidiaries" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashTransferred" xlink:label="ifrs-full_CashTransferred" xlink:title="ifrs-full_CashTransferred"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems" xlink:to="ifrs-full_CashTransferred" xlink:title="Definition : ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems to ifrs-full_CashTransferred" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DividendPayables" xlink:label="ifrs-full_DividendPayables" xlink:title="ifrs-full_DividendPayables"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems" xlink:to="ifrs-full_DividendPayables" xlink:title="Definition : ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems to ifrs-full_DividendPayables" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/InvestmentsInAssociatesSummaryOfFinancialInformationOfAssociatesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CondensedFinancialStatementsCaptionsLineItems" xlink:label="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:title="srt_CondensedFinancialStatementsCaptionsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Assets" xlink:label="ifrs-full_Assets" xlink:title="ifrs-full_Assets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_Assets" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_Assets" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Equity" xlink:label="ifrs-full_Equity" xlink:title="ifrs-full_Equity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_Equity" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_Equity" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Liabilities" xlink:label="ifrs-full_Liabilities" xlink:title="ifrs-full_Liabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_Liabilities" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_Liabilities" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLoss" xlink:label="ifrs-full_ProfitLoss" xlink:title="ifrs-full_ProfitLoss"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_ProfitLoss" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_ProfitLoss" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StatementOfFinancialStatementsTable" xlink:label="csan_StatementOfFinancialStatementsTable" xlink:title="csan_StatementOfFinancialStatementsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="csan_StatementOfFinancialStatementsTable" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to csan_StatementOfFinancialStatementsTable" xlink:type="arc" use="optional" order="4" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:label="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:title="ifrs-full_SignificantInvestmentsInAssociatesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_StatementOfFinancialStatementsTable" xlink:to="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:title="Definition : csan_StatementOfFinancialStatementsTable to ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember" xlink:title="ifrs-full_EntitysTotalForAssociatesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInAssociatesAxis to ifrs-full_EntitysTotalForAssociatesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_JanusBrasilParticipacoesSAMember" xlink:label="csan_JanusBrasilParticipacoesSAMember" xlink:title="csan_JanusBrasilParticipacoesSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="csan_JanusBrasilParticipacoesSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForAssociatesMember to csan_JanusBrasilParticipacoesSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NovviLimitedLiabilityCompanyMember" xlink:label="csan_NovviLimitedLiabilityCompanyMember" xlink:title="csan_NovviLimitedLiabilityCompanyMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="csan_NovviLimitedLiabilityCompanyMember" xlink:title="Definition : ifrs-full_EntitysTotalForAssociatesMember to csan_NovviLimitedLiabilityCompanyMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RadarIIPropriedadesAgricolasSAMember" xlink:label="csan_RadarIIPropriedadesAgricolasSAMember" xlink:title="csan_RadarIIPropriedadesAgricolasSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="csan_RadarIIPropriedadesAgricolasSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForAssociatesMember to csan_RadarIIPropriedadesAgricolasSAMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RadarPropriedadesAgricolasSAMember" xlink:label="csan_RadarPropriedadesAgricolasSAMember" xlink:title="csan_RadarPropriedadesAgricolasSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="csan_RadarPropriedadesAgricolasSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForAssociatesMember to csan_RadarPropriedadesAgricolasSAMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TellusBrasilParticipacoesSAMember" xlink:label="csan_TellusBrasilParticipacoesSAMember" xlink:title="csan_TellusBrasilParticipacoesSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="csan_TellusBrasilParticipacoesSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForAssociatesMember to csan_TellusBrasilParticipacoesSAMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_UsinaSantaLuizaSAMember" xlink:label="csan_UsinaSantaLuizaSAMember" xlink:title="csan_UsinaSantaLuizaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="csan_UsinaSantaLuizaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForAssociatesMember to csan_UsinaSantaLuizaSAMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember_1" xlink:title="ifrs-full_EntitysTotalForAssociatesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInAssociatesAxis to ifrs-full_EntitysTotalForAssociatesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/InvestmentsInAssociatesSummaryOfNonControllingInterestsInSubsidiariesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CondensedFinancialStatementsCaptionsLineItems" xlink:label="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:title="srt_CondensedFinancialStatementsCaptionsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfSharesIssued" xlink:label="ifrs-full_NumberOfSharesIssued" xlink:title="ifrs-full_NumberOfSharesIssued"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_NumberOfSharesIssued" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_NumberOfSharesIssued" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SharesHeldByNoncontrollingShareholders" xlink:label="csan_SharesHeldByNoncontrollingShareholders" xlink:title="csan_SharesHeldByNoncontrollingShareholders"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="csan_SharesHeldByNoncontrollingShareholders" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to csan_SharesHeldByNoncontrollingShareholders" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests" xlink:label="ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests" xlink:title="ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncontrollingInterests" xlink:label="ifrs-full_NoncontrollingInterests" xlink:title="ifrs-full_NoncontrollingInterests"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_NoncontrollingInterests" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_NoncontrollingInterests" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" xlink:label="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" xlink:title="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SalesOrPurchaseOfInterestsInNoncontrollingInterests" xlink:label="csan_SalesOrPurchaseOfInterestsInNoncontrollingInterests" xlink:title="csan_SalesOrPurchaseOfInterestsInNoncontrollingInterests"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="csan_SalesOrPurchaseOfInterestsInNoncontrollingInterests" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to csan_SalesOrPurchaseOfInterestsInNoncontrollingInterests" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherComprehensiveIncomeLoss" xlink:label="csan_OtherComprehensiveIncomeLoss" xlink:title="csan_OtherComprehensiveIncomeLoss"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="csan_OtherComprehensiveIncomeLoss" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to csan_OtherComprehensiveIncomeLoss" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DividendsPaidToNoncontrollingInterests" xlink:label="ifrs-full_DividendsPaidToNoncontrollingInterests" xlink:title="ifrs-full_DividendsPaidToNoncontrollingInterests"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_DividendsPaidToNoncontrollingInterests" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_DividendsPaidToNoncontrollingInterests" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EffectOfChangeInNewAccountingStandardsForNoncontrollingInterest" xlink:label="csan_EffectOfChangeInNewAccountingStandardsForNoncontrollingInterest" xlink:title="csan_EffectOfChangeInNewAccountingStandardsForNoncontrollingInterest"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="csan_EffectOfChangeInNewAccountingStandardsForNoncontrollingInterest" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to csan_EffectOfChangeInNewAccountingStandardsForNoncontrollingInterest" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughAppropriationOfRetainedEarnings" xlink:label="ifrs-full_IncreaseDecreaseThroughAppropriationOfRetainedEarnings" xlink:title="ifrs-full_IncreaseDecreaseThroughAppropriationOfRetainedEarnings"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughAppropriationOfRetainedEarnings" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_IncreaseDecreaseThroughAppropriationOfRetainedEarnings" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate" xlink:label="ifrs-full_NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate" xlink:title="ifrs-full_NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherTransactions" xlink:label="csan_OtherTransactions" xlink:title="csan_OtherTransactions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="csan_OtherTransactions" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to csan_OtherTransactions" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StatementOfFinancialStatementsTable" xlink:label="csan_StatementOfFinancialStatementsTable" xlink:title="csan_StatementOfFinancialStatementsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="csan_StatementOfFinancialStatementsTable" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to csan_StatementOfFinancialStatementsTable" xlink:type="arc" use="optional" order="12" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_StatementOfFinancialStatementsTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : csan_StatementOfFinancialStatementsTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompassGasEEnergiaSAMember" xlink:label="csan_CompassGasEEnergiaSAMember" xlink:title="csan_CompassGasEEnergiaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CompassGasEEnergiaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CompassGasEEnergiaSAMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasMember" xlink:label="csan_ComgasMember" xlink:title="csan_ComgasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ComgasMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ComgasMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LogispotArmazensGeraisSAMember" xlink:label="csan_LogispotArmazensGeraisSAMember" xlink:title="csan_LogispotArmazensGeraisSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_LogispotArmazensGeraisSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_LogispotArmazensGeraisSAMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMember" xlink:label="csan_RumoMember" xlink:title="csan_RumoMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BradoLogisticaeParticipacoesSAMember" xlink:label="csan_BradoLogisticaeParticipacoesSAMember" xlink:title="csan_BradoLogisticaeParticipacoesSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_BradoLogisticaeParticipacoesSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_BradoLogisticaeParticipacoesSAMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMalhaNorteSAMember" xlink:label="csan_RumoMalhaNorteSAMember" xlink:title="csan_RumoMalhaNorteSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMalhaNorteSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMalhaNorteSAMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CliMember" xlink:label="csan_CliMember" xlink:title="csan_CliMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CliMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CliMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAMember" xlink:label="csan_CosanSAMember" xlink:title="csan_CosanSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanSAMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLogisticaSAMember" xlink:label="csan_CosanLogisticaSAMember" xlink:title="csan_CosanLogisticaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanLogisticaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanLogisticaSAMember" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PaylyMember" xlink:label="csan_PaylyMember" xlink:title="csan_PaylyMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_PaylyMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_PaylyMember" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SinlogTecnologiaEmLogisticaSaMember" xlink:label="csan_SinlogTecnologiaEmLogisticaSaMember" xlink:title="csan_SinlogTecnologiaEmLogisticaSaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_SinlogTecnologiaEmLogisticaSaMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_SinlogTecnologiaEmLogisticaSaMember" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TtaMember" xlink:label="csan_TtaMember" xlink:title="csan_TtaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_TtaMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_TtaMember" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLimitedPartnersBrasilConsultoriaLtdaMember" xlink:label="csan_CosanLimitedPartnersBrasilConsultoriaLtdaMember" xlink:title="csan_CosanLimitedPartnersBrasilConsultoriaLtdaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanLimitedPartnersBrasilConsultoriaLtdaMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanLimitedPartnersBrasilConsultoriaLtdaMember" xlink:type="arc" use="optional" order="12" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoSAMember" xlink:label="csan_RumoSAMember" xlink:title="csan_RumoSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoSAMember" xlink:type="arc" use="optional" order="13" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LogispotArmazensAgricolasSAMember" xlink:label="csan_LogispotArmazensAgricolasSAMember" xlink:title="csan_LogispotArmazensAgricolasSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_LogispotArmazensAgricolasSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_LogispotArmazensAgricolasSAMember" xlink:type="arc" use="optional" order="14" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherInvestmentsMember" xlink:label="csan_OtherInvestmentsMember" xlink:title="csan_OtherInvestmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_OtherInvestmentsMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_OtherInvestmentsMember" xlink:type="arc" use="optional" order="15" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLogisticaMember" xlink:label="csan_CosanLogisticaMember" xlink:title="csan_CosanLogisticaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanLogisticaMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanLogisticaMember" xlink:type="arc" use="optional" order="16" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="ifrs-full_CategoriesOfRelatedPartiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_StatementOfFinancialStatementsTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="Definition : csan_StatementOfFinancialStatementsTable to ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SubsidiariesMember" xlink:label="ifrs-full_SubsidiariesMember" xlink:title="ifrs-full_SubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="ifrs-full_SubsidiariesMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to ifrs-full_SubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfTradeReceivablesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfTradeReceivablesLineItems" xlink:label="csan_DisclosureOfTradeReceivablesLineItems" xlink:title="csan_DisclosureOfTradeReceivablesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentTradeReceivables" xlink:label="ifrs-full_CurrentTradeReceivables" xlink:title="ifrs-full_CurrentTradeReceivables"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfTradeReceivablesLineItems" xlink:to="ifrs-full_CurrentTradeReceivables" xlink:title="Definition : csan_DisclosureOfTradeReceivablesLineItems to ifrs-full_CurrentTradeReceivables" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfTradeReceivablesTable" xlink:label="csan_DisclosureOfTradeReceivablesTable" xlink:title="csan_DisclosureOfTradeReceivablesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfTradeReceivablesLineItems" xlink:to="csan_DisclosureOfTradeReceivablesTable" xlink:title="Definition : csan_DisclosureOfTradeReceivablesLineItems to csan_DisclosureOfTradeReceivablesTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:label="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:title="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfTradeReceivablesTable" xlink:to="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:title="Definition : csan_DisclosureOfTradeReceivablesTable to ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember" xlink:title="ifrs-full_CarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember" xlink:title="Definition : ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis to ifrs-full_CarryingAmountMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GrossCarryingAmountMember" xlink:label="ifrs-full_GrossCarryingAmountMember" xlink:title="ifrs-full_GrossCarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_GrossCarryingAmountMember" xlink:title="Definition : ifrs-full_CarryingAmountMember to ifrs-full_GrossCarryingAmountMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AccumulatedImpairmentMember" xlink:label="ifrs-full_AccumulatedImpairmentMember" xlink:title="ifrs-full_AccumulatedImpairmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_AccumulatedImpairmentMember" xlink:title="Definition : ifrs-full_CarryingAmountMember to ifrs-full_AccumulatedImpairmentMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember_1" xlink:title="ifrs-full_CarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember_1" xlink:title="Definition : ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis to ifrs-full_CarryingAmountMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ReceivablesByBillingStatusTypeAxis" xlink:label="csan_ReceivablesByBillingStatusTypeAxis" xlink:title="csan_ReceivablesByBillingStatusTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfTradeReceivablesTable" xlink:to="csan_ReceivablesByBillingStatusTypeAxis" xlink:title="Definition : csan_DisclosureOfTradeReceivablesTable to csan_ReceivablesByBillingStatusTypeAxis" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ReceivablesBillingStatus1Domain" xlink:label="csan_ReceivablesBillingStatus1Domain" xlink:title="csan_ReceivablesBillingStatus1Domain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_ReceivablesByBillingStatusTypeAxis" xlink:to="csan_ReceivablesBillingStatus1Domain" xlink:title="Definition : csan_ReceivablesByBillingStatusTypeAxis to csan_ReceivablesBillingStatus1Domain" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_UnbilledReceivablesMember" xlink:label="csan_UnbilledReceivablesMember" xlink:title="csan_UnbilledReceivablesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_ReceivablesBillingStatus1Domain" xlink:to="csan_UnbilledReceivablesMember" xlink:title="Definition : csan_ReceivablesBillingStatus1Domain to csan_UnbilledReceivablesMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ReceivablesBillingStatus1Domain" xlink:label="csan_ReceivablesBillingStatus1Domain_1" xlink:title="csan_ReceivablesBillingStatus1Domain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_ReceivablesByBillingStatusTypeAxis" xlink:to="csan_ReceivablesBillingStatus1Domain_1" xlink:title="Definition : csan_ReceivablesByBillingStatusTypeAxis to csan_ReceivablesBillingStatus1Domain" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:title="ifrs-full_GeographicalAreasAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfTradeReceivablesTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:title="Definition : csan_DisclosureOfTradeReceivablesTable to ifrs-full_GeographicalAreasAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:title="ifrs-full_GeographicalAreasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:title="Definition : ifrs-full_GeographicalAreasAxis to ifrs-full_GeographicalAreasMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DomesticBrazilianReaisMember" xlink:label="csan_DomesticBrazilianReaisMember" xlink:title="csan_DomesticBrazilianReaisMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="csan_DomesticBrazilianReaisMember" xlink:title="Definition : ifrs-full_GeographicalAreasMember to csan_DomesticBrazilianReaisMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ExportForeignCurrencyMember" xlink:label="csan_ExportForeignCurrencyMember" xlink:title="csan_ExportForeignCurrencyMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="csan_ExportForeignCurrencyMember" xlink:title="Definition : ifrs-full_GeographicalAreasMember to csan_ExportForeignCurrencyMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember_1" xlink:title="ifrs-full_GeographicalAreasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember_1" xlink:title="Definition : ifrs-full_GeographicalAreasAxis to ifrs-full_GeographicalAreasMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentTradeReceivables" xlink:label="ifrs-full_NoncurrentTradeReceivables" xlink:title="ifrs-full_NoncurrentTradeReceivables"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfTradeReceivablesLineItems" xlink:to="ifrs-full_NoncurrentTradeReceivables" xlink:title="Definition : csan_DisclosureOfTradeReceivablesLineItems to ifrs-full_NoncurrentTradeReceivables" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TradeReceivables" xlink:label="ifrs-full_TradeReceivables" xlink:title="ifrs-full_TradeReceivables"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfTradeReceivablesLineItems" xlink:to="ifrs-full_TradeReceivables" xlink:title="Definition : csan_DisclosureOfTradeReceivablesLineItems to ifrs-full_TradeReceivables" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/CorporatereorganizationAdditionalInformationDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:label="ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:title="ifrs-full_DisclosureOfBusinessCombinationsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ConversionRatioPerShareOfAcquireeUponMerger" xlink:label="csan_ConversionRatioPerShareOfAcquireeUponMerger" xlink:title="csan_ConversionRatioPerShareOfAcquireeUponMerger"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:to="csan_ConversionRatioPerShareOfAcquireeUponMerger" xlink:title="Definition : ifrs-full_DisclosureOfBusinessCombinationsLineItems to csan_ConversionRatioPerShareOfAcquireeUponMerger" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ConversionRatioPerShareOfAcquirerUponMerger" xlink:label="csan_ConversionRatioPerShareOfAcquirerUponMerger" xlink:title="csan_ConversionRatioPerShareOfAcquirerUponMerger"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:to="csan_ConversionRatioPerShareOfAcquirerUponMerger" xlink:title="Definition : ifrs-full_DisclosureOfBusinessCombinationsLineItems to csan_ConversionRatioPerShareOfAcquirerUponMerger" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfBusinessCombinationsTable" xlink:label="ifrs-full_DisclosureOfBusinessCombinationsTable" xlink:title="ifrs-full_DisclosureOfBusinessCombinationsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:to="ifrs-full_DisclosureOfBusinessCombinationsTable" xlink:title="Definition : ifrs-full_DisclosureOfBusinessCombinationsLineItems to ifrs-full_DisclosureOfBusinessCombinationsTable" xlink:type="arc" use="optional" order="2" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:title="dei_LegalEntityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfBusinessCombinationsTable" xlink:to="dei_LegalEntityAxis" xlink:title="Definition : ifrs-full_DisclosureOfBusinessCombinationsTable to dei_LegalEntityAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAMember" xlink:label="csan_CosanSAMember" xlink:title="csan_CosanSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_CosanSAMember" xlink:title="Definition : dei_EntityDomain to csan_CosanSAMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain_1" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain_1" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:title="ifrs-full_BusinessCombinationsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfBusinessCombinationsTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:title="Definition : ifrs-full_DisclosureOfBusinessCombinationsTable to ifrs-full_BusinessCombinationsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:title="ifrs-full_EntitysTotalForBusinessCombinationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:title="Definition : ifrs-full_BusinessCombinationsAxis to ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLimitedMember" xlink:label="csan_CosanLimitedMember" xlink:title="csan_CosanLimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="csan_CosanLimitedMember" xlink:title="Definition : ifrs-full_EntitysTotalForBusinessCombinationsMember to csan_CosanLimitedMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLogisticaSAMember" xlink:label="csan_CosanLogisticaSAMember" xlink:title="csan_CosanLogisticaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="csan_CosanLogisticaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForBusinessCombinationsMember to csan_CosanLogisticaSAMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember_1" xlink:title="ifrs-full_EntitysTotalForBusinessCombinationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember_1" xlink:title="Definition : ifrs-full_BusinessCombinationsAxis to ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/InvestmentsInAssociatesSummaryOfCashFlowsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CondensedFinancialStatementsCaptionsLineItems" xlink:label="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:title="srt_CondensedFinancialStatementsCaptionsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashAndCashEquivalents" xlink:label="ifrs-full_CashAndCashEquivalents" xlink:title="ifrs-full_CashAndCashEquivalents"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_CashAndCashEquivalents" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_CashAndCashEquivalents" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:title="ifrs-full_CashFlowsFromUsedInFinancingActivities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:title="ifrs-full_CashFlowsFromUsedInInvestingActivities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:label="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:title="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StatementOfFinancialStatementsTable" xlink:label="csan_StatementOfFinancialStatementsTable" xlink:title="csan_StatementOfFinancialStatementsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="csan_StatementOfFinancialStatementsTable" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to csan_StatementOfFinancialStatementsTable" xlink:type="arc" use="optional" order="5" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="ifrs-full_CategoriesOfRelatedPartiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_StatementOfFinancialStatementsTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="Definition : csan_StatementOfFinancialStatementsTable to ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompanhiaDeGasDeSaoPauloMember" xlink:label="csan_CompanhiaDeGasDeSaoPauloMember" xlink:title="csan_CompanhiaDeGasDeSaoPauloMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_CompanhiaDeGasDeSaoPauloMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_CompanhiaDeGasDeSaoPauloMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLogisticaSAMember" xlink:label="csan_CosanLogisticaSAMember" xlink:title="csan_CosanLogisticaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_CosanLogisticaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_CosanLogisticaSAMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAMember" xlink:label="csan_CosanSAMember" xlink:title="csan_CosanSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_CosanSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_CosanSAMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoSAMember" xlink:label="csan_RumoSAMember" xlink:title="csan_RumoSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_RumoSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_RumoSAMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompassGasEEnergiaSAMember" xlink:label="csan_CompassGasEEnergiaSAMember" xlink:title="csan_CompassGasEEnergiaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_CompassGasEEnergiaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_CompassGasEEnergiaSAMember" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasMember" xlink:label="csan_ComgasMember" xlink:title="csan_ComgasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_ComgasMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_ComgasMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SinlogTecnologiaEmLogisticaSaMember" xlink:label="csan_SinlogTecnologiaEmLogisticaSaMember" xlink:title="csan_SinlogTecnologiaEmLogisticaSaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_SinlogTecnologiaEmLogisticaSaMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_SinlogTecnologiaEmLogisticaSaMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/InvestmentsInAssociatesAdditionalInformationDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:label="ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:title="ifrs-full_DisclosureOfBusinessCombinationsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:label="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:title="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:to="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:title="Definition : ifrs-full_DisclosureOfBusinessCombinationsLineItems to ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="ifrs-full_CategoriesOfRelatedPartiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="Definition : ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable to ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompanhiaDeGasDeSaoPauloMember" xlink:label="csan_CompanhiaDeGasDeSaoPauloMember" xlink:title="csan_CompanhiaDeGasDeSaoPauloMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_CompanhiaDeGasDeSaoPauloMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_CompanhiaDeGasDeSaoPauloMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:title="ifrs-full_BusinessCombinationsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:title="Definition : ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable to ifrs-full_BusinessCombinationsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:title="ifrs-full_EntitysTotalForBusinessCombinationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:title="Definition : ifrs-full_BusinessCombinationsAxis to ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember_1" xlink:title="ifrs-full_EntitysTotalForBusinessCombinationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember_1" xlink:title="Definition : ifrs-full_BusinessCombinationsAxis to ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis" xlink:label="ifrs-full_ClassesOfShareCapitalAxis" xlink:title="ifrs-full_ClassesOfShareCapitalAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:to="ifrs-full_ClassesOfShareCapitalAxis" xlink:title="Definition : ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable to ifrs-full_ClassesOfShareCapitalAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember" xlink:title="ifrs-full_ClassesOfShareCapitalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalAxis to ifrs-full_ClassesOfShareCapitalMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PreferenceSharesMember" xlink:label="ifrs-full_PreferenceSharesMember" xlink:title="ifrs-full_PreferenceSharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="ifrs-full_PreferenceSharesMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalMember to ifrs-full_PreferenceSharesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OrdinarySharesMember" xlink:label="ifrs-full_OrdinarySharesMember" xlink:title="ifrs-full_OrdinarySharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="ifrs-full_OrdinarySharesMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalMember to ifrs-full_OrdinarySharesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember_1" xlink:title="ifrs-full_ClassesOfShareCapitalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember_1" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalAxis to ifrs-full_ClassesOfShareCapitalMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasMember" xlink:label="csan_ComgasMember" xlink:title="csan_ComgasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ComgasMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ComgasMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" xlink:title="ifrs-full_RangeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:to="ifrs-full_RangeAxis" xlink:title="Definition : ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable to ifrs-full_RangeAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BottomOfRangeMember" xlink:label="ifrs-full_BottomOfRangeMember" xlink:title="ifrs-full_BottomOfRangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_BottomOfRangeMember" xlink:title="Definition : ifrs-full_RangesMember to ifrs-full_BottomOfRangeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="ifrs-full_TopOfRangeMember" xlink:title="ifrs-full_TopOfRangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_TopOfRangeMember" xlink:title="Definition : ifrs-full_RangesMember to ifrs-full_TopOfRangeMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember_1" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember_1" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashTransferred" xlink:label="ifrs-full_CashTransferred" xlink:title="ifrs-full_CashTransferred"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:to="ifrs-full_CashTransferred" xlink:title="Definition : ifrs-full_DisclosureOfBusinessCombinationsLineItems to ifrs-full_CashTransferred" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GoodwillRecognisedAsOfAcquisitionDate" xlink:label="ifrs-full_GoodwillRecognisedAsOfAcquisitionDate" xlink:title="ifrs-full_GoodwillRecognisedAsOfAcquisitionDate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:to="ifrs-full_GoodwillRecognisedAsOfAcquisitionDate" xlink:title="Definition : ifrs-full_DisclosureOfBusinessCombinationsLineItems to ifrs-full_GoodwillRecognisedAsOfAcquisitionDate" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GainLossThatRelatesToIdentifiableAssetsAcquiredOrLiabilitiesAssumedInBusinessCombination" xlink:label="ifrs-full_GainLossThatRelatesToIdentifiableAssetsAcquiredOrLiabilitiesAssumedInBusinessCombination" xlink:title="ifrs-full_GainLossThatRelatesToIdentifiableAssetsAcquiredOrLiabilitiesAssumedInBusinessCombination"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:to="ifrs-full_GainLossThatRelatesToIdentifiableAssetsAcquiredOrLiabilitiesAssumedInBusinessCombination" xlink:title="Definition : ifrs-full_DisclosureOfBusinessCombinationsLineItems to ifrs-full_GainLossThatRelatesToIdentifiableAssetsAcquiredOrLiabilitiesAssumedInBusinessCombination" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ParValuePerShare" xlink:label="ifrs-full_ParValuePerShare" xlink:title="ifrs-full_ParValuePerShare"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:to="ifrs-full_ParValuePerShare" xlink:title="Definition : ifrs-full_DisclosureOfBusinessCombinationsLineItems to ifrs-full_ParValuePerShare" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:label="ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:title="ifrs-full_PercentageOfVotingEquityInterestsAcquired"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:to="ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:title="Definition : ifrs-full_DisclosureOfBusinessCombinationsLineItems to ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfInstrumentOrInterestIssuedOrIssuable" xlink:label="csan_NumberOfInstrumentOrInterestIssuedOrIssuable" xlink:title="csan_NumberOfInstrumentOrInterestIssuedOrIssuable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:to="csan_NumberOfInstrumentOrInterestIssuedOrIssuable" xlink:title="Definition : ifrs-full_DisclosureOfBusinessCombinationsLineItems to csan_NumberOfInstrumentOrInterestIssuedOrIssuable" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/InvestmentsInJointVenturesAdditionalInformationDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfJointVenturesLineItems" xlink:label="ifrs-full_DisclosureOfJointVenturesLineItems" xlink:title="ifrs-full_DisclosureOfJointVenturesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfJointVenturesTable" xlink:label="ifrs-full_DisclosureOfJointVenturesTable" xlink:title="ifrs-full_DisclosureOfJointVenturesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfJointVenturesLineItems" xlink:to="ifrs-full_DisclosureOfJointVenturesTable" xlink:title="Definition : ifrs-full_DisclosureOfJointVenturesLineItems to ifrs-full_DisclosureOfJointVenturesTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_JointVenturesAxis" xlink:label="ifrs-full_JointVenturesAxis" xlink:title="ifrs-full_JointVenturesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfJointVenturesTable" xlink:to="ifrs-full_JointVenturesAxis" xlink:title="Definition : ifrs-full_DisclosureOfJointVenturesTable to ifrs-full_JointVenturesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember" xlink:title="ifrs-full_EntitysTotalForJointVenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember" xlink:title="Definition : ifrs-full_JointVenturesAxis to ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenCombustiveisSAMember" xlink:label="csan_RaizenCombustiveisSAMember" xlink:title="csan_RaizenCombustiveisSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForJointVenturesMember" xlink:to="csan_RaizenCombustiveisSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForJointVenturesMember to csan_RaizenCombustiveisSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenEnergiaSAMember" xlink:label="csan_RaizenEnergiaSAMember" xlink:title="csan_RaizenEnergiaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForJointVenturesMember" xlink:to="csan_RaizenEnergiaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForJointVenturesMember to csan_RaizenEnergiaSAMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember_1" xlink:title="ifrs-full_EntitysTotalForJointVenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember_1" xlink:title="Definition : ifrs-full_JointVenturesAxis to ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NewIFRSsAxis" xlink:label="ifrs-full_NewIFRSsAxis" xlink:title="ifrs-full_NewIFRSsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfJointVenturesTable" xlink:to="ifrs-full_NewIFRSsAxis" xlink:title="Definition : ifrs-full_DisclosureOfJointVenturesTable to ifrs-full_NewIFRSsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NewIFRSsMember" xlink:label="ifrs-full_NewIFRSsMember" xlink:title="ifrs-full_NewIFRSsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_NewIFRSsAxis" xlink:to="ifrs-full_NewIFRSsMember" xlink:title="Definition : ifrs-full_NewIFRSsAxis to ifrs-full_NewIFRSsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IfrsSixteenMember" xlink:label="csan_IfrsSixteenMember" xlink:title="csan_IfrsSixteenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NewIFRSsMember" xlink:to="csan_IfrsSixteenMember" xlink:title="Definition : ifrs-full_NewIFRSsMember to csan_IfrsSixteenMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NewIFRSsMember" xlink:label="ifrs-full_NewIFRSsMember_1" xlink:title="ifrs-full_NewIFRSsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_NewIFRSsAxis" xlink:to="ifrs-full_NewIFRSsMember_1" xlink:title="Definition : ifrs-full_NewIFRSsAxis to ifrs-full_NewIFRSsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncomeStatementAxis" xlink:label="csan_IncomeStatementAxis" xlink:title="csan_IncomeStatementAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfJointVenturesTable" xlink:to="csan_IncomeStatementAxis" xlink:title="Definition : ifrs-full_DisclosureOfJointVenturesTable to csan_IncomeStatementAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncomeStatementDomain" xlink:label="csan_IncomeStatementDomain" xlink:title="csan_IncomeStatementDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_IncomeStatementAxis" xlink:to="csan_IncomeStatementDomain" xlink:title="Definition : csan_IncomeStatementAxis to csan_IncomeStatementDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IcmsExclusionMember" xlink:label="csan_IcmsExclusionMember" xlink:title="csan_IcmsExclusionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_IncomeStatementDomain" xlink:to="csan_IcmsExclusionMember" xlink:title="Definition : csan_IncomeStatementDomain to csan_IcmsExclusionMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SaleToFemsaComercioMember" xlink:label="csan_SaleToFemsaComercioMember" xlink:title="csan_SaleToFemsaComercioMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_IncomeStatementDomain" xlink:to="csan_SaleToFemsaComercioMember" xlink:title="Definition : csan_IncomeStatementDomain to csan_SaleToFemsaComercioMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncomeStatementDomain" xlink:label="csan_IncomeStatementDomain_1" xlink:title="csan_IncomeStatementDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_IncomeStatementAxis" xlink:to="csan_IncomeStatementDomain_1" xlink:title="Definition : csan_IncomeStatementAxis to csan_IncomeStatementDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfJointVentures" xlink:label="csan_NumberOfJointVentures" xlink:title="csan_NumberOfJointVentures"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfJointVenturesLineItems" xlink:to="csan_NumberOfJointVentures" xlink:title="Definition : ifrs-full_DisclosureOfJointVenturesLineItems to csan_NumberOfJointVentures" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:label="ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:title="ifrs-full_ProportionOfOwnershipInterestInJointVenture"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfJointVenturesLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:title="Definition : ifrs-full_DisclosureOfJointVenturesLineItems to ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_UndrawnBorrowingFacilities" xlink:label="ifrs-full_UndrawnBorrowingFacilities" xlink:title="ifrs-full_UndrawnBorrowingFacilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfJointVenturesLineItems" xlink:to="ifrs-full_UndrawnBorrowingFacilities" xlink:title="Definition : ifrs-full_DisclosureOfJointVenturesLineItems to ifrs-full_UndrawnBorrowingFacilities" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/InvestmentsInJointVenturesSummaryOfChangesToInvestmentsInJointVenturesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfJointVenturesLineItems" xlink:label="ifrs-full_DisclosureOfJointVenturesLineItems" xlink:title="ifrs-full_DisclosureOfJointVenturesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfJointVenturesTable" xlink:label="ifrs-full_DisclosureOfJointVenturesTable" xlink:title="ifrs-full_DisclosureOfJointVenturesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfJointVenturesLineItems" xlink:to="ifrs-full_DisclosureOfJointVenturesTable" xlink:title="Definition : ifrs-full_DisclosureOfJointVenturesLineItems to ifrs-full_DisclosureOfJointVenturesTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_JointVenturesAxis" xlink:label="ifrs-full_JointVenturesAxis" xlink:title="ifrs-full_JointVenturesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfJointVenturesTable" xlink:to="ifrs-full_JointVenturesAxis" xlink:title="Definition : ifrs-full_DisclosureOfJointVenturesTable to ifrs-full_JointVenturesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember" xlink:title="ifrs-full_EntitysTotalForJointVenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember" xlink:title="Definition : ifrs-full_JointVenturesAxis to ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenCombustiveisSAMember" xlink:label="csan_RaizenCombustiveisSAMember" xlink:title="csan_RaizenCombustiveisSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForJointVenturesMember" xlink:to="csan_RaizenCombustiveisSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForJointVenturesMember to csan_RaizenCombustiveisSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenEnergiaSAMember" xlink:label="csan_RaizenEnergiaSAMember" xlink:title="csan_RaizenEnergiaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForJointVenturesMember" xlink:to="csan_RaizenEnergiaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForJointVenturesMember to csan_RaizenEnergiaSAMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember_1" xlink:title="ifrs-full_EntitysTotalForJointVenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember_1" xlink:title="Definition : ifrs-full_JointVenturesAxis to ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DividendsReceivedFromJointVentures" xlink:label="csan_DividendsReceivedFromJointVentures" xlink:title="csan_DividendsReceivedFromJointVentures"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfJointVenturesLineItems" xlink:to="csan_DividendsReceivedFromJointVentures" xlink:title="Definition : ifrs-full_DisclosureOfJointVenturesLineItems to csan_DividendsReceivedFromJointVentures" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseInAccountingEstimate" xlink:label="ifrs-full_IncreaseDecreaseInAccountingEstimate" xlink:title="ifrs-full_IncreaseDecreaseInAccountingEstimate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfJointVenturesLineItems" xlink:to="ifrs-full_IncreaseDecreaseInAccountingEstimate" xlink:title="Definition : ifrs-full_DisclosureOfJointVenturesLineItems to ifrs-full_IncreaseDecreaseInAccountingEstimate" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_InterestOnCapital" xlink:label="csan_InterestOnCapital" xlink:title="csan_InterestOnCapital"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfJointVenturesLineItems" xlink:to="csan_InterestOnCapital" xlink:title="Definition : ifrs-full_DisclosureOfJointVenturesLineItems to csan_InterestOnCapital" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InvestmentsInJointVenturesAccountedForUsingEquityMethod" xlink:label="ifrs-full_InvestmentsInJointVenturesAccountedForUsingEquityMethod" xlink:title="ifrs-full_InvestmentsInJointVenturesAccountedForUsingEquityMethod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfJointVenturesLineItems" xlink:to="ifrs-full_InvestmentsInJointVenturesAccountedForUsingEquityMethod" xlink:title="Definition : ifrs-full_DisclosureOfJointVenturesLineItems to ifrs-full_InvestmentsInJointVenturesAccountedForUsingEquityMethod" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfSharesHeldByParent" xlink:label="csan_NumberOfSharesHeldByParent" xlink:title="csan_NumberOfSharesHeldByParent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfJointVenturesLineItems" xlink:to="csan_NumberOfSharesHeldByParent" xlink:title="Definition : ifrs-full_DisclosureOfJointVenturesLineItems to csan_NumberOfSharesHeldByParent" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfSharesIssued" xlink:label="ifrs-full_NumberOfSharesIssued" xlink:title="ifrs-full_NumberOfSharesIssued"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfJointVenturesLineItems" xlink:to="ifrs-full_NumberOfSharesIssued" xlink:title="Definition : ifrs-full_DisclosureOfJointVenturesLineItems to ifrs-full_NumberOfSharesIssued" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:label="ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:title="ifrs-full_ProportionOfOwnershipInterestInJointVenture"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfJointVenturesLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:title="Definition : ifrs-full_DisclosureOfJointVenturesLineItems to ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod" xlink:label="ifrs-full_ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod" xlink:title="ifrs-full_ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfJointVenturesLineItems" xlink:to="ifrs-full_ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod" xlink:title="Definition : ifrs-full_DisclosureOfJointVenturesLineItems to ifrs-full_ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ShareOfTotalComprehensiveIncomeOfJointVenturesAccountedForUsingEquityMethod" xlink:label="csan_ShareOfTotalComprehensiveIncomeOfJointVenturesAccountedForUsingEquityMethod" xlink:title="csan_ShareOfTotalComprehensiveIncomeOfJointVenturesAccountedForUsingEquityMethod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfJointVenturesLineItems" xlink:to="csan_ShareOfTotalComprehensiveIncomeOfJointVenturesAccountedForUsingEquityMethod" xlink:title="Definition : ifrs-full_DisclosureOfJointVenturesLineItems to csan_ShareOfTotalComprehensiveIncomeOfJointVenturesAccountedForUsingEquityMethod" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/InvestmentsInAssociatesSummaryOfProfitOrLossAndOtherComprehensiveIncomeDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CondensedFinancialStatementsCaptionsLineItems" xlink:label="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:title="srt_CondensedFinancialStatementsCaptionsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ComprehensiveIncome" xlink:label="ifrs-full_ComprehensiveIncome" xlink:title="ifrs-full_ComprehensiveIncome"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_ComprehensiveIncome" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_ComprehensiveIncome" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:label="ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:title="ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DividendsPaid" xlink:label="ifrs-full_DividendsPaid" xlink:title="ifrs-full_DividendsPaid"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_DividendsPaid" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_DividendsPaid" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:label="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:title="ifrs-full_IncomeTaxExpenseContinuingOperations"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherComprehensiveIncome" xlink:label="ifrs-full_OtherComprehensiveIncome" xlink:title="ifrs-full_OtherComprehensiveIncome"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_OtherComprehensiveIncome" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_OtherComprehensiveIncome" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLoss" xlink:label="ifrs-full_ProfitLoss" xlink:title="ifrs-full_ProfitLoss"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_ProfitLoss" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_ProfitLoss" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLossBeforeTax" xlink:label="ifrs-full_ProfitLossBeforeTax" xlink:title="ifrs-full_ProfitLossBeforeTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_ProfitLossBeforeTax" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_ProfitLossBeforeTax" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Revenue" xlink:label="ifrs-full_Revenue" xlink:title="ifrs-full_Revenue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_Revenue" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_Revenue" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StatementOfFinancialStatementsTable" xlink:label="csan_StatementOfFinancialStatementsTable" xlink:title="csan_StatementOfFinancialStatementsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="csan_StatementOfFinancialStatementsTable" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to csan_StatementOfFinancialStatementsTable" xlink:type="arc" use="optional" order="8" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="ifrs-full_CategoriesOfRelatedPartiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_StatementOfFinancialStatementsTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="Definition : csan_StatementOfFinancialStatementsTable to ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompanhiaDeGasDeSaoPauloMember" xlink:label="csan_CompanhiaDeGasDeSaoPauloMember" xlink:title="csan_CompanhiaDeGasDeSaoPauloMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_CompanhiaDeGasDeSaoPauloMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_CompanhiaDeGasDeSaoPauloMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLogisticaSAMember" xlink:label="csan_CosanLogisticaSAMember" xlink:title="csan_CosanLogisticaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_CosanLogisticaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_CosanLogisticaSAMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAMember" xlink:label="csan_CosanSAMember" xlink:title="csan_CosanSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_CosanSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_CosanSAMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoSAMember" xlink:label="csan_RumoSAMember" xlink:title="csan_RumoSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_RumoSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_RumoSAMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompassGasEEnergiaSAMember" xlink:label="csan_CompassGasEEnergiaSAMember" xlink:title="csan_CompassGasEEnergiaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_CompassGasEEnergiaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_CompassGasEEnergiaSAMember" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasMember" xlink:label="csan_ComgasMember" xlink:title="csan_ComgasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_ComgasMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_ComgasMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SinlogTecnologiaEmLogisticaSaMember" xlink:label="csan_SinlogTecnologiaEmLogisticaSaMember" xlink:title="csan_SinlogTecnologiaEmLogisticaSaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_SinlogTecnologiaEmLogisticaSaMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_SinlogTecnologiaEmLogisticaSaMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/PropertyplantandequipmentintangibleassetsgoodwillrightofuseassetsandcontractassetsSummaryofDepreciationonStraightlineBasisOvertheEstimatedUsefullifeofAssetsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:title="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:title="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems to ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:label="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:title="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:to="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable to ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentMember" xlink:label="ifrs-full_PropertyPlantAndEquipmentMember" xlink:title="ifrs-full_PropertyPlantAndEquipmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:to="ifrs-full_PropertyPlantAndEquipmentMember" xlink:title="Definition : ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis to ifrs-full_PropertyPlantAndEquipmentMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BuildingsAndImprovementsMember" xlink:label="csan_BuildingsAndImprovementsMember" xlink:title="csan_BuildingsAndImprovementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="csan_BuildingsAndImprovementsMember" xlink:title="Definition : ifrs-full_PropertyPlantAndEquipmentMember to csan_BuildingsAndImprovementsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ComputerEquipmentMember" xlink:label="ifrs-full_ComputerEquipmentMember" xlink:title="ifrs-full_ComputerEquipmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="ifrs-full_ComputerEquipmentMember" xlink:title="Definition : ifrs-full_PropertyPlantAndEquipmentMember to ifrs-full_ComputerEquipmentMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FixturesAndFittingsMember" xlink:label="ifrs-full_FixturesAndFittingsMember" xlink:title="ifrs-full_FixturesAndFittingsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="ifrs-full_FixturesAndFittingsMember" xlink:title="Definition : ifrs-full_PropertyPlantAndEquipmentMember to ifrs-full_FixturesAndFittingsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LocomotivesMember" xlink:label="csan_LocomotivesMember" xlink:title="csan_LocomotivesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="csan_LocomotivesMember" xlink:title="Definition : ifrs-full_PropertyPlantAndEquipmentMember to csan_LocomotivesMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MachineryEquipmentAndFacilitiesMember" xlink:label="csan_MachineryEquipmentAndFacilitiesMember" xlink:title="csan_MachineryEquipmentAndFacilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="csan_MachineryEquipmentAndFacilitiesMember" xlink:title="Definition : ifrs-full_PropertyPlantAndEquipmentMember to csan_MachineryEquipmentAndFacilitiesMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PermanentRailwaysMember" xlink:label="csan_PermanentRailwaysMember" xlink:title="csan_PermanentRailwaysMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="csan_PermanentRailwaysMember" xlink:title="Definition : ifrs-full_PropertyPlantAndEquipmentMember to csan_PermanentRailwaysMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RailcarsMember" xlink:label="csan_RailcarsMember" xlink:title="csan_RailcarsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="csan_RailcarsMember" xlink:title="Definition : ifrs-full_PropertyPlantAndEquipmentMember to csan_RailcarsMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_VehiclesMember" xlink:label="ifrs-full_VehiclesMember" xlink:title="ifrs-full_VehiclesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="ifrs-full_VehiclesMember" xlink:title="Definition : ifrs-full_PropertyPlantAndEquipmentMember to ifrs-full_VehiclesMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentMember" xlink:label="ifrs-full_PropertyPlantAndEquipmentMember_1" xlink:title="ifrs-full_PropertyPlantAndEquipmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:to="ifrs-full_PropertyPlantAndEquipmentMember_1" xlink:title="Definition : ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis to ifrs-full_PropertyPlantAndEquipmentMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" xlink:title="ifrs-full_RangeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:to="ifrs-full_RangeAxis" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable to ifrs-full_RangeAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BottomOfRangeMember" xlink:label="ifrs-full_BottomOfRangeMember" xlink:title="ifrs-full_BottomOfRangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_BottomOfRangeMember" xlink:title="Definition : ifrs-full_RangesMember to ifrs-full_BottomOfRangeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="ifrs-full_TopOfRangeMember" xlink:title="ifrs-full_TopOfRangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_TopOfRangeMember" xlink:title="Definition : ifrs-full_RangesMember to ifrs-full_TopOfRangeMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember_1" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember_1" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfDepreciation" xlink:label="csan_PercentageOfDepreciation" xlink:title="csan_PercentageOfDepreciation"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="csan_PercentageOfDepreciation" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems to csan_PercentageOfDepreciation" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/PropertyplantandequipmentintangibleassetsgoodwillrightofuseassetsandcontractassetsScheduleofPropertyPlantandEquipmentDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:title="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:label="ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:title="ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems to ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:label="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:title="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems to ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:title="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems to ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:type="arc" use="optional" order="2" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:label="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:title="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:to="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable to ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember" xlink:title="ifrs-full_CarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember" xlink:title="Definition : ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis to ifrs-full_CarryingAmountMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:label="ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:title="ifrs-full_AccumulatedDepreciationAndAmortisationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:title="Definition : ifrs-full_CarryingAmountMember to ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GrossCarryingAmountMember" xlink:label="ifrs-full_GrossCarryingAmountMember" xlink:title="ifrs-full_GrossCarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_GrossCarryingAmountMember" xlink:title="Definition : ifrs-full_CarryingAmountMember to ifrs-full_GrossCarryingAmountMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember_1" xlink:title="ifrs-full_CarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember_1" xlink:title="Definition : ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis to ifrs-full_CarryingAmountMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:label="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:title="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:to="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable to ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentMember" xlink:label="ifrs-full_PropertyPlantAndEquipmentMember" xlink:title="ifrs-full_PropertyPlantAndEquipmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:to="ifrs-full_PropertyPlantAndEquipmentMember" xlink:title="Definition : ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis to ifrs-full_PropertyPlantAndEquipmentMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ConstructionInProgressMember" xlink:label="ifrs-full_ConstructionInProgressMember" xlink:title="ifrs-full_ConstructionInProgressMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="ifrs-full_ConstructionInProgressMember" xlink:title="Definition : ifrs-full_PropertyPlantAndEquipmentMember to ifrs-full_ConstructionInProgressMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LandAndBuildingsMember" xlink:label="ifrs-full_LandAndBuildingsMember" xlink:title="ifrs-full_LandAndBuildingsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="ifrs-full_LandAndBuildingsMember" xlink:title="Definition : ifrs-full_PropertyPlantAndEquipmentMember to ifrs-full_LandAndBuildingsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MachineryEquipmentAndFacilitiesMember" xlink:label="csan_MachineryEquipmentAndFacilitiesMember" xlink:title="csan_MachineryEquipmentAndFacilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="csan_MachineryEquipmentAndFacilitiesMember" xlink:title="Definition : ifrs-full_PropertyPlantAndEquipmentMember to csan_MachineryEquipmentAndFacilitiesMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherPropertyPlantAndEquipmentMember" xlink:label="ifrs-full_OtherPropertyPlantAndEquipmentMember" xlink:title="ifrs-full_OtherPropertyPlantAndEquipmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="ifrs-full_OtherPropertyPlantAndEquipmentMember" xlink:title="Definition : ifrs-full_PropertyPlantAndEquipmentMember to ifrs-full_OtherPropertyPlantAndEquipmentMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PermanentEasementMember" xlink:label="csan_PermanentEasementMember" xlink:title="csan_PermanentEasementMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="csan_PermanentEasementMember" xlink:title="Definition : ifrs-full_PropertyPlantAndEquipmentMember to csan_PermanentEasementMember" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PermanentRailwaysMember" xlink:label="csan_PermanentRailwaysMember" xlink:title="csan_PermanentRailwaysMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="csan_PermanentRailwaysMember" xlink:title="Definition : ifrs-full_PropertyPlantAndEquipmentMember to csan_PermanentRailwaysMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RailcarsAndLocomotivesMember" xlink:label="csan_RailcarsAndLocomotivesMember" xlink:title="csan_RailcarsAndLocomotivesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="csan_RailcarsAndLocomotivesMember" xlink:title="Definition : ifrs-full_PropertyPlantAndEquipmentMember to csan_RailcarsAndLocomotivesMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentMember" xlink:label="ifrs-full_PropertyPlantAndEquipmentMember_1" xlink:title="ifrs-full_PropertyPlantAndEquipmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:to="ifrs-full_PropertyPlantAndEquipmentMember_1" xlink:title="Definition : ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis to ifrs-full_PropertyPlantAndEquipmentMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:label="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:title="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:to="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable to ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RestatedMember" xlink:label="ifrs-full_RestatedMember" xlink:title="ifrs-full_RestatedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:to="ifrs-full_RestatedMember" xlink:title="Definition : ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis to ifrs-full_RestatedMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PreviouslyStatedMember" xlink:label="ifrs-full_PreviouslyStatedMember" xlink:title="ifrs-full_PreviouslyStatedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RestatedMember" xlink:to="ifrs-full_PreviouslyStatedMember" xlink:title="Definition : ifrs-full_RestatedMember to ifrs-full_PreviouslyStatedMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseDueToChangesInAccountingPolicyAndCorrectionsOfPriorPeriodErrorsMember" xlink:label="ifrs-full_IncreaseDecreaseDueToChangesInAccountingPolicyAndCorrectionsOfPriorPeriodErrorsMember" xlink:title="ifrs-full_IncreaseDecreaseDueToChangesInAccountingPolicyAndCorrectionsOfPriorPeriodErrorsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RestatedMember" xlink:to="ifrs-full_IncreaseDecreaseDueToChangesInAccountingPolicyAndCorrectionsOfPriorPeriodErrorsMember" xlink:title="Definition : ifrs-full_RestatedMember to ifrs-full_IncreaseDecreaseDueToChangesInAccountingPolicyAndCorrectionsOfPriorPeriodErrorsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RestatedMember" xlink:label="ifrs-full_RestatedMember_1" xlink:title="ifrs-full_RestatedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:to="ifrs-full_RestatedMember_1" xlink:title="Definition : ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis to ifrs-full_RestatedMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment" xlink:label="ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment" xlink:title="ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems to ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreaseDecreaseThroughDisposalPropertyPlantAndEquipment" xlink:label="csan_IncreaseDecreaseThroughDisposalPropertyPlantAndEquipment" xlink:title="csan_IncreaseDecreaseThroughDisposalPropertyPlantAndEquipment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="csan_IncreaseDecreaseThroughDisposalPropertyPlantAndEquipment" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems to csan_IncreaseDecreaseThroughDisposalPropertyPlantAndEquipment" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment" xlink:label="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment" xlink:title="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems to ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment" xlink:label="ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment" xlink:title="ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems to ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipment" xlink:label="ifrs-full_PropertyPlantAndEquipment" xlink:title="ifrs-full_PropertyPlantAndEquipment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="ifrs-full_PropertyPlantAndEquipment" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems to ifrs-full_PropertyPlantAndEquipment" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreasedecreaseThroughDiscontinuedOperationPropertyPlantAndEquipment" xlink:label="csan_IncreasedecreaseThroughDiscontinuedOperationPropertyPlantAndEquipment" xlink:title="csan_IncreasedecreaseThroughDiscontinuedOperationPropertyPlantAndEquipment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="csan_IncreasedecreaseThroughDiscontinuedOperationPropertyPlantAndEquipment" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems to csan_IncreasedecreaseThroughDiscontinuedOperationPropertyPlantAndEquipment" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/PropertyplantandequipmentintangibleassetsgoodwillrightofuseassetsandcontractassetsScheduleofPropertyPlantandEquipmentParentheticalDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:title="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BankLoanGuarantee" xlink:label="csan_BankLoanGuarantee" xlink:title="csan_BankLoanGuarantee"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="csan_BankLoanGuarantee" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems to csan_BankLoanGuarantee" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:title="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems to ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:label="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:title="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:to="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable to ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentMember" xlink:label="ifrs-full_PropertyPlantAndEquipmentMember" xlink:title="ifrs-full_PropertyPlantAndEquipmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:to="ifrs-full_PropertyPlantAndEquipmentMember" xlink:title="Definition : ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis to ifrs-full_PropertyPlantAndEquipmentMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_WagonsAndLocomotivesMember" xlink:label="csan_WagonsAndLocomotivesMember" xlink:title="csan_WagonsAndLocomotivesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="csan_WagonsAndLocomotivesMember" xlink:title="Definition : ifrs-full_PropertyPlantAndEquipmentMember to csan_WagonsAndLocomotivesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentMember" xlink:label="ifrs-full_PropertyPlantAndEquipmentMember_1" xlink:title="ifrs-full_PropertyPlantAndEquipmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:to="ifrs-full_PropertyPlantAndEquipmentMember_1" xlink:title="Definition : ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis to ifrs-full_PropertyPlantAndEquipmentMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NewIFRSsAxis" xlink:label="ifrs-full_NewIFRSsAxis" xlink:title="ifrs-full_NewIFRSsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:to="ifrs-full_NewIFRSsAxis" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable to ifrs-full_NewIFRSsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NewIFRSsMember" xlink:label="ifrs-full_NewIFRSsMember" xlink:title="ifrs-full_NewIFRSsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_NewIFRSsAxis" xlink:to="ifrs-full_NewIFRSsMember" xlink:title="Definition : ifrs-full_NewIFRSsAxis to ifrs-full_NewIFRSsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IfrsSixteenMember" xlink:label="csan_IfrsSixteenMember" xlink:title="csan_IfrsSixteenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NewIFRSsMember" xlink:to="csan_IfrsSixteenMember" xlink:title="Definition : ifrs-full_NewIFRSsMember to csan_IfrsSixteenMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NewIFRSsMember" xlink:label="ifrs-full_NewIFRSsMember_1" xlink:title="ifrs-full_NewIFRSsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_NewIFRSsAxis" xlink:to="ifrs-full_NewIFRSsMember_1" xlink:title="Definition : ifrs-full_NewIFRSsAxis to ifrs-full_NewIFRSsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:label="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:title="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:to="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable to ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember" xlink:title="ifrs-full_CarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember" xlink:title="Definition : ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis to ifrs-full_CarryingAmountMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GrossCarryingAmountMember" xlink:label="ifrs-full_GrossCarryingAmountMember" xlink:title="ifrs-full_GrossCarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_GrossCarryingAmountMember" xlink:title="Definition : ifrs-full_CarryingAmountMember to ifrs-full_GrossCarryingAmountMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:label="ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:title="ifrs-full_AccumulatedDepreciationAndAmortisationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:title="Definition : ifrs-full_CarryingAmountMember to ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember_1" xlink:title="ifrs-full_CarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember_1" xlink:title="Definition : ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis to ifrs-full_CarryingAmountMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreasedecreaseThroughTransfersFromtoRightOfUseAssets" xlink:label="csan_IncreasedecreaseThroughTransfersFromtoRightOfUseAssets" xlink:title="csan_IncreasedecreaseThroughTransfersFromtoRightOfUseAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="csan_IncreasedecreaseThroughTransfersFromtoRightOfUseAssets" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems to csan_IncreasedecreaseThroughTransfersFromtoRightOfUseAssets" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/PropertyplantandequipmentintangibleassetsgoodwillrightofuseassetsandcontractassetsSummaryofIntangibleAssetsandGoodwillDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems" xlink:label="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems" xlink:title="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:label="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:title="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems" xlink:to="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:title="Definition : ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems to ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable" xlink:label="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable" xlink:title="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems" xlink:to="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable" xlink:title="Definition : ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems to ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:label="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:title="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable" xlink:to="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:title="Definition : ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable to ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember" xlink:title="ifrs-full_CarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember" xlink:title="Definition : ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis to ifrs-full_CarryingAmountMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:label="ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:title="ifrs-full_AccumulatedDepreciationAndAmortisationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:title="Definition : ifrs-full_CarryingAmountMember to ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GrossCarryingAmountMember" xlink:label="ifrs-full_GrossCarryingAmountMember" xlink:title="ifrs-full_GrossCarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_GrossCarryingAmountMember" xlink:title="Definition : ifrs-full_CarryingAmountMember to ifrs-full_GrossCarryingAmountMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember_1" xlink:title="ifrs-full_CarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember_1" xlink:title="Definition : ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis to ifrs-full_CarryingAmountMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:label="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:title="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable" xlink:to="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:title="Definition : ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable to ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:label="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:title="ifrs-full_IntangibleAssetsAndGoodwillMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:to="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:title="Definition : ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis to ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BrandNamesMember" xlink:label="ifrs-full_BrandNamesMember" xlink:title="ifrs-full_BrandNamesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ifrs-full_BrandNamesMember" xlink:title="Definition : ifrs-full_IntangibleAssetsAndGoodwillMember to ifrs-full_BrandNamesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CustomerrelatedIntangibleAssetsMember" xlink:label="ifrs-full_CustomerrelatedIntangibleAssetsMember" xlink:title="ifrs-full_CustomerrelatedIntangibleAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ifrs-full_CustomerrelatedIntangibleAssetsMember" xlink:title="Definition : ifrs-full_IntangibleAssetsAndGoodwillMember to ifrs-full_CustomerrelatedIntangibleAssetsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GoodwillMember" xlink:label="ifrs-full_GoodwillMember" xlink:title="ifrs-full_GoodwillMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ifrs-full_GoodwillMember" xlink:title="Definition : ifrs-full_IntangibleAssetsAndGoodwillMember to ifrs-full_GoodwillMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OperatingLicenseMember" xlink:label="csan_OperatingLicenseMember" xlink:title="csan_OperatingLicenseMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="csan_OperatingLicenseMember" xlink:title="Definition : ifrs-full_IntangibleAssetsAndGoodwillMember to csan_OperatingLicenseMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherIntangibleAssetsMember" xlink:label="ifrs-full_OtherIntangibleAssetsMember" xlink:title="ifrs-full_OtherIntangibleAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ifrs-full_OtherIntangibleAssetsMember" xlink:title="Definition : ifrs-full_IntangibleAssetsAndGoodwillMember to ifrs-full_OtherIntangibleAssetsMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ServiceConcessionRightsMember" xlink:label="ifrs-full_ServiceConcessionRightsMember" xlink:title="ifrs-full_ServiceConcessionRightsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ifrs-full_ServiceConcessionRightsMember" xlink:title="Definition : ifrs-full_IntangibleAssetsAndGoodwillMember to ifrs-full_ServiceConcessionRightsMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:label="ifrs-full_IntangibleAssetsAndGoodwillMember_1" xlink:title="ifrs-full_IntangibleAssetsAndGoodwillMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:to="ifrs-full_IntangibleAssetsAndGoodwillMember_1" xlink:title="Definition : ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis to ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:label="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:title="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable" xlink:to="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:title="Definition : ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable to ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RestatedMember" xlink:label="ifrs-full_RestatedMember" xlink:title="ifrs-full_RestatedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:to="ifrs-full_RestatedMember" xlink:title="Definition : ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis to ifrs-full_RestatedMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RestatedMember" xlink:label="ifrs-full_RestatedMember_1" xlink:title="ifrs-full_RestatedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:to="ifrs-full_RestatedMember_1" xlink:title="Definition : ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis to ifrs-full_RestatedMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisposalsIntangibleAssetsAndGoodwill" xlink:label="ifrs-full_DisposalsIntangibleAssetsAndGoodwill" xlink:title="ifrs-full_DisposalsIntangibleAssetsAndGoodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems" xlink:to="ifrs-full_DisposalsIntangibleAssetsAndGoodwill" xlink:title="Definition : ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems to ifrs-full_DisposalsIntangibleAssetsAndGoodwill" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment" xlink:label="ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment" xlink:title="ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems" xlink:to="ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment" xlink:title="Definition : ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems to ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill" xlink:label="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill" xlink:title="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill" xlink:title="Definition : ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems to ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransfersIntangibleAssetsAndGoodwill" xlink:label="ifrs-full_IncreaseDecreaseThroughTransfersIntangibleAssetsAndGoodwill" xlink:title="ifrs-full_IncreaseDecreaseThroughTransfersIntangibleAssetsAndGoodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughTransfersIntangibleAssetsAndGoodwill" xlink:title="Definition : ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems to ifrs-full_IncreaseDecreaseThroughTransfersIntangibleAssetsAndGoodwill" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwill" xlink:label="ifrs-full_IntangibleAssetsAndGoodwill" xlink:title="ifrs-full_IntangibleAssetsAndGoodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems" xlink:to="ifrs-full_IntangibleAssetsAndGoodwill" xlink:title="Definition : ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems to ifrs-full_IntangibleAssetsAndGoodwill" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreaseDecreaseThroughDiscontinuedOperationIntangibleAssetsAndGoodwill" xlink:label="csan_IncreaseDecreaseThroughDiscontinuedOperationIntangibleAssetsAndGoodwill" xlink:title="csan_IncreaseDecreaseThroughDiscontinuedOperationIntangibleAssetsAndGoodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems" xlink:to="csan_IncreaseDecreaseThroughDiscontinuedOperationIntangibleAssetsAndGoodwill" xlink:title="Definition : ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems to csan_IncreaseDecreaseThroughDiscontinuedOperationIntangibleAssetsAndGoodwill" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AcquisitionsThroughBusinessCombinationPreliminaryGoodwillTransfer" xlink:label="csan_AcquisitionsThroughBusinessCombinationPreliminaryGoodwillTransfer" xlink:title="csan_AcquisitionsThroughBusinessCombinationPreliminaryGoodwillTransfer"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems" xlink:to="csan_AcquisitionsThroughBusinessCombinationPreliminaryGoodwillTransfer" xlink:title="Definition : ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems to csan_AcquisitionsThroughBusinessCombinationPreliminaryGoodwillTransfer" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/PropertyplantandequipmentintangibleassetsgoodwillrightofuseassetsandcontractassetsSummaryofIntangibleAssetsandGoodwillParentheticalDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems" xlink:label="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems" xlink:title="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill" xlink:label="ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill" xlink:title="ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems" xlink:to="ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill" xlink:title="Definition : ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems to ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:label="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:title="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems" xlink:to="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:title="Definition : ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems to ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable" xlink:label="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable" xlink:title="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems" xlink:to="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable" xlink:title="Definition : ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems to ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable" xlink:type="arc" use="optional" order="2" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:title="ifrs-full_BusinessCombinationsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:title="Definition : ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable to ifrs-full_BusinessCombinationsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:title="ifrs-full_EntitysTotalForBusinessCombinationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:title="Definition : ifrs-full_BusinessCombinationsAxis to ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LubrigrupoiiSAMember" xlink:label="csan_LubrigrupoiiSAMember" xlink:title="csan_LubrigrupoiiSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="csan_LubrigrupoiiSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForBusinessCombinationsMember to csan_LubrigrupoiiSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MetrolubeMember" xlink:label="csan_MetrolubeMember" xlink:title="csan_MetrolubeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="csan_MetrolubeMember" xlink:title="Definition : ifrs-full_EntitysTotalForBusinessCombinationsMember to csan_MetrolubeMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StanbridgeGroupLimitedMember" xlink:label="csan_StanbridgeGroupLimitedMember" xlink:title="csan_StanbridgeGroupLimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="csan_StanbridgeGroupLimitedMember" xlink:title="Definition : ifrs-full_EntitysTotalForBusinessCombinationsMember to csan_StanbridgeGroupLimitedMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TTASASTechniquesEtTechnologiesAppliqueesMember" xlink:label="csan_TTASASTechniquesEtTechnologiesAppliqueesMember" xlink:title="csan_TTASASTechniquesEtTechnologiesAppliqueesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="csan_TTASASTechniquesEtTechnologiesAppliqueesMember" xlink:title="Definition : ifrs-full_EntitysTotalForBusinessCombinationsMember to csan_TTASASTechniquesEtTechnologiesAppliqueesMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember_1" xlink:title="ifrs-full_EntitysTotalForBusinessCombinationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember_1" xlink:title="Definition : ifrs-full_BusinessCombinationsAxis to ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/PropertyplantandequipmentintangibleassetsgoodwillrightofuseassetsandcontractassetsAdditionalInformationDetail1"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:title="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingCostsCapitalised" xlink:label="ifrs-full_BorrowingCostsCapitalised" xlink:title="ifrs-full_BorrowingCostsCapitalised"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="ifrs-full_BorrowingCostsCapitalised" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems to ifrs-full_BorrowingCostsCapitalised" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:title="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems to ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsAxis" xlink:label="ifrs-full_ClassesOfAssetsAxis" xlink:title="ifrs-full_ClassesOfAssetsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:to="ifrs-full_ClassesOfAssetsAxis" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable to ifrs-full_ClassesOfAssetsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember" xlink:title="ifrs-full_ClassesOfAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsAxis to ifrs-full_ClassesOfAssetsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentMember" xlink:label="ifrs-full_PropertyPlantAndEquipmentMember" xlink:title="ifrs-full_PropertyPlantAndEquipmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ifrs-full_PropertyPlantAndEquipmentMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsMember to ifrs-full_PropertyPlantAndEquipmentMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/OtherTaxReceivablesAdditionalInformationDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TradeAndOtherCurrentReceivablesLineItems" xlink:label="csan_TradeAndOtherCurrentReceivablesLineItems" xlink:title="csan_TradeAndOtherCurrentReceivablesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TaxBenefitFromFederalTaxAuthorities" xlink:label="csan_TaxBenefitFromFederalTaxAuthorities" xlink:title="csan_TaxBenefitFromFederalTaxAuthorities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_TradeAndOtherCurrentReceivablesLineItems" xlink:to="csan_TaxBenefitFromFederalTaxAuthorities" xlink:title="Definition : csan_TradeAndOtherCurrentReceivablesLineItems to csan_TaxBenefitFromFederalTaxAuthorities" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FinancialResults" xlink:label="csan_FinancialResults" xlink:title="csan_FinancialResults"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_TradeAndOtherCurrentReceivablesLineItems" xlink:to="csan_FinancialResults" xlink:title="Definition : csan_TradeAndOtherCurrentReceivablesLineItems to csan_FinancialResults" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherRevenue" xlink:label="ifrs-full_OtherRevenue" xlink:title="ifrs-full_OtherRevenue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_TradeAndOtherCurrentReceivablesLineItems" xlink:to="ifrs-full_OtherRevenue" xlink:title="Definition : csan_TradeAndOtherCurrentReceivablesLineItems to ifrs-full_OtherRevenue" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TradeAndOtherCurrentReceivablesTable" xlink:label="csan_TradeAndOtherCurrentReceivablesTable" xlink:title="csan_TradeAndOtherCurrentReceivablesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_TradeAndOtherCurrentReceivablesLineItems" xlink:to="csan_TradeAndOtherCurrentReceivablesTable" xlink:title="Definition : csan_TradeAndOtherCurrentReceivablesLineItems to csan_TradeAndOtherCurrentReceivablesTable" xlink:type="arc" use="optional" order="3" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:title="dei_LegalEntityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_TradeAndOtherCurrentReceivablesTable" xlink:to="dei_LegalEntityAxis" xlink:title="Definition : csan_TradeAndOtherCurrentReceivablesTable to dei_LegalEntityAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAMember" xlink:label="csan_CosanSAMember" xlink:title="csan_CosanSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_CosanSAMember" xlink:title="Definition : dei_EntityDomain to csan_CosanSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain_1" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain_1" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_LitigationCaseAxis" xlink:label="srt_LitigationCaseAxis" xlink:title="srt_LitigationCaseAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_TradeAndOtherCurrentReceivablesTable" xlink:to="srt_LitigationCaseAxis" xlink:title="Definition : csan_TradeAndOtherCurrentReceivablesTable to srt_LitigationCaseAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_LitigationCaseTypeDomain" xlink:label="srt_LitigationCaseTypeDomain" xlink:title="srt_LitigationCaseTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_LitigationCaseAxis" xlink:to="srt_LitigationCaseTypeDomain" xlink:title="Definition : srt_LitigationCaseAxis to srt_LitigationCaseTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PisAndCofinsMember" xlink:label="csan_PisAndCofinsMember" xlink:title="csan_PisAndCofinsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_LitigationCaseTypeDomain" xlink:to="csan_PisAndCofinsMember" xlink:title="Definition : srt_LitigationCaseTypeDomain to csan_PisAndCofinsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_LitigationCaseTypeDomain" xlink:label="srt_LitigationCaseTypeDomain_1" xlink:title="srt_LitigationCaseTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_LitigationCaseAxis" xlink:to="srt_LitigationCaseTypeDomain_1" xlink:title="Definition : srt_LitigationCaseAxis to srt_LitigationCaseTypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/PropertyplantandequipmentintangibleassetsgoodwillrightofuseassetsandcontractassetsSummaryoftransactionchartsofrightofuseassetsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:label="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:title="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RightofuseAssets" xlink:label="ifrs-full_RightofuseAssets" xlink:title="ifrs-full_RightofuseAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:to="ifrs-full_RightofuseAssets" xlink:title="Definition : ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems to ifrs-full_RightofuseAssets" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdditionsToRightofuseAssets" xlink:label="ifrs-full_AdditionsToRightofuseAssets" xlink:title="ifrs-full_AdditionsToRightofuseAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:to="ifrs-full_AdditionsToRightofuseAssets" xlink:title="Definition : ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems to ifrs-full_AdditionsToRightofuseAssets" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreasedecreaseThroughContractualAdjustmentsRightOfUseAssets" xlink:label="csan_IncreasedecreaseThroughContractualAdjustmentsRightOfUseAssets" xlink:title="csan_IncreasedecreaseThroughContractualAdjustmentsRightOfUseAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:to="csan_IncreasedecreaseThroughContractualAdjustmentsRightOfUseAssets" xlink:title="Definition : ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems to csan_IncreasedecreaseThroughContractualAdjustmentsRightOfUseAssets" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreasedecreaseThroughTransfersRightOfUseAssets" xlink:label="csan_IncreasedecreaseThroughTransfersRightOfUseAssets" xlink:title="csan_IncreasedecreaseThroughTransfersRightOfUseAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:to="csan_IncreasedecreaseThroughTransfersRightOfUseAssets" xlink:title="Definition : ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems to csan_IncreasedecreaseThroughTransfersRightOfUseAssets" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreasedecreaseThroughCurrencyTranslationAdjustmentsRightOfUseAssets" xlink:label="csan_IncreasedecreaseThroughCurrencyTranslationAdjustmentsRightOfUseAssets" xlink:title="csan_IncreasedecreaseThroughCurrencyTranslationAdjustmentsRightOfUseAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:to="csan_IncreasedecreaseThroughCurrencyTranslationAdjustmentsRightOfUseAssets" xlink:title="Definition : ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems to csan_IncreasedecreaseThroughCurrencyTranslationAdjustmentsRightOfUseAssets" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreasedecreaseThroughTransfersFromtoPropertyPlantAndEquipment" xlink:label="csan_IncreasedecreaseThroughTransfersFromtoPropertyPlantAndEquipment" xlink:title="csan_IncreasedecreaseThroughTransfersFromtoPropertyPlantAndEquipment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:to="csan_IncreasedecreaseThroughTransfersFromtoPropertyPlantAndEquipment" xlink:title="Definition : ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems to csan_IncreasedecreaseThroughTransfersFromtoPropertyPlantAndEquipment" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ImpairmentLossRecognisedInProfitOrLossRightOfUseAssets" xlink:label="csan_ImpairmentLossRecognisedInProfitOrLossRightOfUseAssets" xlink:title="csan_ImpairmentLossRecognisedInProfitOrLossRightOfUseAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:to="csan_ImpairmentLossRecognisedInProfitOrLossRightOfUseAssets" xlink:title="Definition : ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems to csan_ImpairmentLossRecognisedInProfitOrLossRightOfUseAssets" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreaseDecreaseThroughInitialRecognitionOfRightOfUseAssets" xlink:label="csan_IncreaseDecreaseThroughInitialRecognitionOfRightOfUseAssets" xlink:title="csan_IncreaseDecreaseThroughInitialRecognitionOfRightOfUseAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:to="csan_IncreaseDecreaseThroughInitialRecognitionOfRightOfUseAssets" xlink:title="Definition : ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems to csan_IncreaseDecreaseThroughInitialRecognitionOfRightOfUseAssets" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreasedecreaseThroughTransfersFromtoPropertyPlantAndEquipmentAndOtherAssets" xlink:label="csan_IncreasedecreaseThroughTransfersFromtoPropertyPlantAndEquipmentAndOtherAssets" xlink:title="csan_IncreasedecreaseThroughTransfersFromtoPropertyPlantAndEquipmentAndOtherAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:to="csan_IncreasedecreaseThroughTransfersFromtoPropertyPlantAndEquipmentAndOtherAssets" xlink:title="Definition : ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems to csan_IncreasedecreaseThroughTransfersFromtoPropertyPlantAndEquipmentAndOtherAssets" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable" xlink:label="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable" xlink:title="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:to="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable" xlink:title="Definition : ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems to ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable" xlink:type="arc" use="optional" order="10" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsAxis" xlink:label="ifrs-full_ClassesOfAssetsAxis" xlink:title="ifrs-full_ClassesOfAssetsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable" xlink:to="ifrs-full_ClassesOfAssetsAxis" xlink:title="Definition : ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable to ifrs-full_ClassesOfAssetsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember" xlink:title="ifrs-full_ClassesOfAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsAxis to ifrs-full_ClassesOfAssetsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LandAndBuildingsMember" xlink:label="ifrs-full_LandAndBuildingsMember" xlink:title="ifrs-full_LandAndBuildingsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ifrs-full_LandAndBuildingsMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsMember to ifrs-full_LandAndBuildingsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MachineryEquipmentAndFacilitiesMember" xlink:label="csan_MachineryEquipmentAndFacilitiesMember" xlink:title="csan_MachineryEquipmentAndFacilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="csan_MachineryEquipmentAndFacilitiesMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsMember to csan_MachineryEquipmentAndFacilitiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FreightCarsAndLocomotivesMember" xlink:label="csan_FreightCarsAndLocomotivesMember" xlink:title="csan_FreightCarsAndLocomotivesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="csan_FreightCarsAndLocomotivesMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsMember to csan_FreightCarsAndLocomotivesMember" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SoftwareMember" xlink:label="csan_SoftwareMember" xlink:title="csan_SoftwareMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="csan_SoftwareMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsMember to csan_SoftwareMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_VehiclesMember" xlink:label="ifrs-full_VehiclesMember" xlink:title="ifrs-full_VehiclesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ifrs-full_VehiclesMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsMember to ifrs-full_VehiclesMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PortAndRailInfrastructureMember" xlink:label="csan_PortAndRailInfrastructureMember" xlink:title="csan_PortAndRailInfrastructureMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="csan_PortAndRailInfrastructureMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsMember to csan_PortAndRailInfrastructureMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember_1" xlink:title="ifrs-full_ClassesOfAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember_1" xlink:title="Definition : ifrs-full_ClassesOfAssetsAxis to ifrs-full_ClassesOfAssetsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:label="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:title="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable" xlink:to="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:title="Definition : ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable to ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember" xlink:title="ifrs-full_CarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember" xlink:title="Definition : ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis to ifrs-full_CarryingAmountMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GrossCarryingAmountMember" xlink:label="ifrs-full_GrossCarryingAmountMember" xlink:title="ifrs-full_GrossCarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_GrossCarryingAmountMember" xlink:title="Definition : ifrs-full_CarryingAmountMember to ifrs-full_GrossCarryingAmountMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:label="ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:title="ifrs-full_AccumulatedDepreciationAndAmortisationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:title="Definition : ifrs-full_CarryingAmountMember to ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember_1" xlink:title="ifrs-full_CarryingAmountMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember_1" xlink:title="Definition : ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis to ifrs-full_CarryingAmountMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/PropertyplantandequipmentintangibleassetsgoodwillrightofuseassetsandcontractassetsSummaryoftransactionchartsofrightofuseassetsParentheticalDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:title="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable" xlink:label="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable" xlink:title="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems to ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsAxis" xlink:label="ifrs-full_ClassesOfAssetsAxis" xlink:title="ifrs-full_ClassesOfAssetsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable" xlink:to="ifrs-full_ClassesOfAssetsAxis" xlink:title="Definition : ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable to ifrs-full_ClassesOfAssetsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember" xlink:title="ifrs-full_ClassesOfAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsAxis to ifrs-full_ClassesOfAssetsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentMember" xlink:label="ifrs-full_PropertyPlantAndEquipmentMember" xlink:title="ifrs-full_PropertyPlantAndEquipmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ifrs-full_PropertyPlantAndEquipmentMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsMember to ifrs-full_PropertyPlantAndEquipmentMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherAssetsMember" xlink:label="ifrs-full_OtherAssetsMember" xlink:title="ifrs-full_OtherAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="ifrs-full_OtherAssetsMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsMember to ifrs-full_OtherAssetsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember_1" xlink:title="ifrs-full_ClassesOfAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember_1" xlink:title="Definition : ifrs-full_ClassesOfAssetsAxis to ifrs-full_ClassesOfAssetsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreasedecreaseThroughTransfersFromtoPropertyPlantAndEquipmentAndOtherAssets" xlink:label="csan_IncreasedecreaseThroughTransfersFromtoPropertyPlantAndEquipmentAndOtherAssets" xlink:title="csan_IncreasedecreaseThroughTransfersFromtoPropertyPlantAndEquipmentAndOtherAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="csan_IncreasedecreaseThroughTransfersFromtoPropertyPlantAndEquipmentAndOtherAssets" xlink:title="Definition : ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems to csan_IncreasedecreaseThroughTransfersFromtoPropertyPlantAndEquipmentAndOtherAssets" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ConcessionsPayableSummaryOfConcessionsPayableDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:label="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:title="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable" xlink:label="csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable" xlink:title="csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfLiabilitiesAxis" xlink:label="ifrs-full_ClassesOfLiabilitiesAxis" xlink:title="ifrs-full_ClassesOfLiabilitiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable" xlink:to="ifrs-full_ClassesOfLiabilitiesAxis" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable to ifrs-full_ClassesOfLiabilitiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilitiesMember" xlink:label="ifrs-full_LiabilitiesMember" xlink:title="ifrs-full_LiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfLiabilitiesAxis" xlink:to="ifrs-full_LiabilitiesMember" xlink:title="Definition : ifrs-full_ClassesOfLiabilitiesAxis to ifrs-full_LiabilitiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CourtDiscussionMember" xlink:label="csan_CourtDiscussionMember" xlink:title="csan_CourtDiscussionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesMember" xlink:to="csan_CourtDiscussionMember" xlink:title="Definition : ifrs-full_LiabilitiesMember to csan_CourtDiscussionMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RailroadConcessionPayableUnderLitigationMember" xlink:label="csan_RailroadConcessionPayableUnderLitigationMember" xlink:title="csan_RailroadConcessionPayableUnderLitigationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesMember" xlink:to="csan_RailroadConcessionPayableUnderLitigationMember" xlink:title="Definition : ifrs-full_LiabilitiesMember to csan_RailroadConcessionPayableUnderLitigationMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherConcessionsPayableMember" xlink:label="csan_OtherConcessionsPayableMember" xlink:title="csan_OtherConcessionsPayableMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesMember" xlink:to="csan_OtherConcessionsPayableMember" xlink:title="Definition : ifrs-full_LiabilitiesMember to csan_OtherConcessionsPayableMember" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ConcessionsPayableMember" xlink:label="csan_ConcessionsPayableMember" xlink:title="csan_ConcessionsPayableMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesMember" xlink:to="csan_ConcessionsPayableMember" xlink:title="Definition : ifrs-full_LiabilitiesMember to csan_ConcessionsPayableMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LeasesAndConcessionsPayableMember" xlink:label="csan_LeasesAndConcessionsPayableMember" xlink:title="csan_LeasesAndConcessionsPayableMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesMember" xlink:to="csan_LeasesAndConcessionsPayableMember" xlink:title="Definition : ifrs-full_LiabilitiesMember to csan_LeasesAndConcessionsPayableMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilitiesMember" xlink:label="ifrs-full_LiabilitiesMember_1" xlink:title="ifrs-full_LiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfLiabilitiesAxis" xlink:to="ifrs-full_LiabilitiesMember_1" xlink:title="Definition : ifrs-full_ClassesOfLiabilitiesAxis to ifrs-full_LiabilitiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMalhaPaulistaSAMember" xlink:label="csan_RumoMalhaPaulistaSAMember" xlink:title="csan_RumoMalhaPaulistaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMalhaPaulistaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMalhaPaulistaSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMalhaOesteSAMember" xlink:label="csan_RumoMalhaOesteSAMember" xlink:title="csan_RumoMalhaOesteSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMalhaOesteSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMalhaOesteSAMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMalhaSulSAMember" xlink:label="csan_RumoMalhaSulSAMember" xlink:title="csan_RumoMalhaSulSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMalhaSulSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMalhaSulSAMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ConcessionsPayables" xlink:label="csan_ConcessionsPayables" xlink:title="csan_ConcessionsPayables"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_ConcessionsPayables" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_ConcessionsPayables" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CurrentConcessionsPayables" xlink:label="csan_CurrentConcessionsPayables" xlink:title="csan_CurrentConcessionsPayables"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_CurrentConcessionsPayables" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_CurrentConcessionsPayables" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NoncurrentConcessionsPayables" xlink:label="csan_NoncurrentConcessionsPayables" xlink:title="csan_NoncurrentConcessionsPayables"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_NoncurrentConcessionsPayables" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_NoncurrentConcessionsPayables" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LeasePayable" xlink:label="csan_LeasePayable" xlink:title="csan_LeasePayable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_LeasePayable" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_LeasePayable" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LeasesAndConcessionsPayable" xlink:label="csan_LeasesAndConcessionsPayable" xlink:title="csan_LeasesAndConcessionsPayable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_LeasesAndConcessionsPayable" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_LeasesAndConcessionsPayable" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ConcessionsPayableAdditionalInformationDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:label="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:title="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable" xlink:label="csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable" xlink:title="csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfLiabilitiesAxis" xlink:label="ifrs-full_ClassesOfLiabilitiesAxis" xlink:title="ifrs-full_ClassesOfLiabilitiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable" xlink:to="ifrs-full_ClassesOfLiabilitiesAxis" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable to ifrs-full_ClassesOfLiabilitiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilitiesMember" xlink:label="ifrs-full_LiabilitiesMember" xlink:title="ifrs-full_LiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfLiabilitiesAxis" xlink:to="ifrs-full_LiabilitiesMember" xlink:title="Definition : ifrs-full_ClassesOfLiabilitiesAxis to ifrs-full_LiabilitiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RailroadConcessionPayableUnderLitigationMember" xlink:label="csan_RailroadConcessionPayableUnderLitigationMember" xlink:title="csan_RailroadConcessionPayableUnderLitigationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesMember" xlink:to="csan_RailroadConcessionPayableUnderLitigationMember" xlink:title="Definition : ifrs-full_LiabilitiesMember to csan_RailroadConcessionPayableUnderLitigationMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilitiesMember" xlink:label="ifrs-full_LiabilitiesMember_1" xlink:title="ifrs-full_LiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfLiabilitiesAxis" xlink:to="ifrs-full_LiabilitiesMember_1" xlink:title="Definition : ifrs-full_ClassesOfLiabilitiesAxis to ifrs-full_LiabilitiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="ifrs-full_CategoriesOfRelatedPartiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable to ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoSAMember" xlink:label="csan_RumoSAMember" xlink:title="csan_RumoSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_RumoSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_RumoSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasMember" xlink:label="csan_ComgasMember" xlink:title="csan_ComgasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_ComgasMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_ComgasMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GainsOnLitigationSettlements" xlink:label="ifrs-full_GainsOnLitigationSettlements" xlink:title="ifrs-full_GainsOnLitigationSettlements"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="ifrs-full_GainsOnLitigationSettlements" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to ifrs-full_GainsOnLitigationSettlements" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GainOnReversalOfLeaseLiabilitiesRelatedToOtherIncomeExpenses" xlink:label="csan_GainOnReversalOfLeaseLiabilitiesRelatedToOtherIncomeExpenses" xlink:title="csan_GainOnReversalOfLeaseLiabilitiesRelatedToOtherIncomeExpenses"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_GainOnReversalOfLeaseLiabilitiesRelatedToOtherIncomeExpenses" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_GainOnReversalOfLeaseLiabilitiesRelatedToOtherIncomeExpenses" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GainOnReversalOfLeaseLiabilitiesRelatedToFinancialResult" xlink:label="csan_GainOnReversalOfLeaseLiabilitiesRelatedToFinancialResult" xlink:title="csan_GainOnReversalOfLeaseLiabilitiesRelatedToFinancialResult"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_GainOnReversalOfLeaseLiabilitiesRelatedToFinancialResult" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_GainOnReversalOfLeaseLiabilitiesRelatedToFinancialResult" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DescriptionOfLifeAndOtherSignificantTermsOfArrangementInvolvingLegalFormOfLease2019" xlink:label="csan_DescriptionOfLifeAndOtherSignificantTermsOfArrangementInvolvingLegalFormOfLease2019" xlink:title="csan_DescriptionOfLifeAndOtherSignificantTermsOfArrangementInvolvingLegalFormOfLease2019"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_DescriptionOfLifeAndOtherSignificantTermsOfArrangementInvolvingLegalFormOfLease2019" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_DescriptionOfLifeAndOtherSignificantTermsOfArrangementInvolvingLegalFormOfLease2019" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FinancialCommitmentEstimatedPresentValue" xlink:label="csan_FinancialCommitmentEstimatedPresentValue" xlink:title="csan_FinancialCommitmentEstimatedPresentValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_FinancialCommitmentEstimatedPresentValue" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_FinancialCommitmentEstimatedPresentValue" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ConcessionsPayableSummaryOfJudicialDepositsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfJudicialDepositsLineItems" xlink:label="csan_DisclosureOfJudicialDepositsLineItems" xlink:title="csan_DisclosureOfJudicialDepositsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfJudicialDepositsTable" xlink:label="csan_DisclosureOfJudicialDepositsTable" xlink:title="csan_DisclosureOfJudicialDepositsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfJudicialDepositsLineItems" xlink:to="csan_DisclosureOfJudicialDepositsTable" xlink:title="Definition : csan_DisclosureOfJudicialDepositsLineItems to csan_DisclosureOfJudicialDepositsTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfJudicialDepositsTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : csan_DisclosureOfJudicialDepositsTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMalhaPaulistaMember" xlink:label="csan_RumoMalhaPaulistaMember" xlink:title="csan_RumoMalhaPaulistaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMalhaPaulistaMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMalhaPaulistaMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMalhaOesteMember" xlink:label="csan_RumoMalhaOesteMember" xlink:title="csan_RumoMalhaOesteMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMalhaOesteMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMalhaOesteMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_JudicialDeposits" xlink:label="csan_JudicialDeposits" xlink:title="csan_JudicialDeposits"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfJudicialDepositsLineItems" xlink:to="csan_JudicialDeposits" xlink:title="Definition : csan_DisclosureOfJudicialDepositsLineItems to csan_JudicialDeposits" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ConcessionsPayableSummaryOfRegulatoryAssetsLiabilitiesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems" xlink:label="ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems" xlink:title="ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CostOfGasToBeRecoveredTransferred" xlink:label="csan_CostOfGasToBeRecoveredTransferred" xlink:title="csan_CostOfGasToBeRecoveredTransferred"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems" xlink:to="csan_CostOfGasToBeRecoveredTransferred" xlink:title="Definition : ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems to csan_CostOfGasToBeRecoveredTransferred" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CreditsOfTaxesToBeRecoveredTransferred" xlink:label="csan_CreditsOfTaxesToBeRecoveredTransferred" xlink:title="csan_CreditsOfTaxesToBeRecoveredTransferred"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems" xlink:to="csan_CreditsOfTaxesToBeRecoveredTransferred" xlink:title="Definition : ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems to csan_CreditsOfTaxesToBeRecoveredTransferred" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughBalancesRecognisedInCurrentPeriodInStatementOfFinancialPositionRegulatoryDeferralAccountCreditBalances" xlink:label="ifrs-full_IncreaseDecreaseThroughBalancesRecognisedInCurrentPeriodInStatementOfFinancialPositionRegulatoryDeferralAccountCreditBalances" xlink:title="ifrs-full_IncreaseDecreaseThroughBalancesRecognisedInCurrentPeriodInStatementOfFinancialPositionRegulatoryDeferralAccountCreditBalances"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughBalancesRecognisedInCurrentPeriodInStatementOfFinancialPositionRegulatoryDeferralAccountCreditBalances" xlink:title="Definition : ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems to ifrs-full_IncreaseDecreaseThroughBalancesRecognisedInCurrentPeriodInStatementOfFinancialPositionRegulatoryDeferralAccountCreditBalances" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesTable" xlink:label="ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesTable" xlink:title="ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems" xlink:to="ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesTable" xlink:title="Definition : ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems to ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesTable" xlink:type="arc" use="optional" order="3" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompanhiaDeGasDeSaoPauloMember" xlink:label="csan_CompanhiaDeGasDeSaoPauloMember" xlink:title="csan_CompanhiaDeGasDeSaoPauloMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CompanhiaDeGasDeSaoPauloMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CompanhiaDeGasDeSaoPauloMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreaseDecreaseThroughChangesInExtemporaneousCreditRegulatoryDeferralAccountCreditBalances" xlink:label="csan_IncreaseDecreaseThroughChangesInExtemporaneousCreditRegulatoryDeferralAccountCreditBalances" xlink:title="csan_IncreaseDecreaseThroughChangesInExtemporaneousCreditRegulatoryDeferralAccountCreditBalances"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems" xlink:to="csan_IncreaseDecreaseThroughChangesInExtemporaneousCreditRegulatoryDeferralAccountCreditBalances" xlink:title="Definition : ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems to csan_IncreaseDecreaseThroughChangesInExtemporaneousCreditRegulatoryDeferralAccountCreditBalances" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesRegulatoryDeferralAccountCreditBalances" xlink:label="ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesRegulatoryDeferralAccountCreditBalances" xlink:title="ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesRegulatoryDeferralAccountCreditBalances"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesRegulatoryDeferralAccountCreditBalances" xlink:title="Definition : ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems to ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesRegulatoryDeferralAccountCreditBalances" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NetCurrentAccountFlowForActualCostOfGasIncurred" xlink:label="csan_NetCurrentAccountFlowForActualCostOfGasIncurred" xlink:title="csan_NetCurrentAccountFlowForActualCostOfGasIncurred"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems" xlink:to="csan_NetCurrentAccountFlowForActualCostOfGasIncurred" xlink:title="Definition : ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems to csan_NetCurrentAccountFlowForActualCostOfGasIncurred" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RegulatoryAssetsLiabilitiesNet" xlink:label="csan_RegulatoryAssetsLiabilitiesNet" xlink:title="csan_RegulatoryAssetsLiabilitiesNet"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems" xlink:to="csan_RegulatoryAssetsLiabilitiesNet" xlink:title="Definition : ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems to csan_RegulatoryAssetsLiabilitiesNet" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RegulatoryAssetsLiabilitiesTaxDeferralAccountCreditBalances" xlink:label="csan_RegulatoryAssetsLiabilitiesTaxDeferralAccountCreditBalances" xlink:title="csan_RegulatoryAssetsLiabilitiesTaxDeferralAccountCreditBalances"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems" xlink:to="csan_RegulatoryAssetsLiabilitiesTaxDeferralAccountCreditBalances" xlink:title="Definition : ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems to csan_RegulatoryAssetsLiabilitiesTaxDeferralAccountCreditBalances" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RegulatoryAssetsLiabilitiesTaxDeferralAccountCreditBalancesNet" xlink:label="csan_RegulatoryAssetsLiabilitiesTaxDeferralAccountCreditBalancesNet" xlink:title="csan_RegulatoryAssetsLiabilitiesTaxDeferralAccountCreditBalancesNet"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems" xlink:to="csan_RegulatoryAssetsLiabilitiesTaxDeferralAccountCreditBalancesNet" xlink:title="Definition : ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems to csan_RegulatoryAssetsLiabilitiesTaxDeferralAccountCreditBalancesNet" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreaseDecreaseThroughOtherAdjustments" xlink:label="csan_IncreaseDecreaseThroughOtherAdjustments" xlink:title="csan_IncreaseDecreaseThroughOtherAdjustments"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems" xlink:to="csan_IncreaseDecreaseThroughOtherAdjustments" xlink:title="Definition : ifrs-full_DisclosureOfInformationAboutAmountsRecognisedInRelationToRegulatoryDeferralAccountBalancesLineItems to csan_IncreaseDecreaseThroughOtherAdjustments" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/OtherTaxesPayableScheduleOfOtherTaxesPayableDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfOtherTaxesLineItems" xlink:label="csan_DisclosureOfOtherTaxesLineItems" xlink:title="csan_DisclosureOfOtherTaxesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax" xlink:label="ifrs-full_CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax" xlink:title="ifrs-full_CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfOtherTaxesLineItems" xlink:to="ifrs-full_CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax" xlink:title="Definition : csan_DisclosureOfOtherTaxesLineItems to ifrs-full_CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfOtherTaxesTable" xlink:label="csan_DisclosureOfOtherTaxesTable" xlink:title="csan_DisclosureOfOtherTaxesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfOtherTaxesLineItems" xlink:to="csan_DisclosureOfOtherTaxesTable" xlink:title="Definition : csan_DisclosureOfOtherTaxesLineItems to csan_DisclosureOfOtherTaxesTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis" xlink:label="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis" xlink:title="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfOtherTaxesTable" xlink:to="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis" xlink:title="Definition : csan_DisclosureOfOtherTaxesTable to ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:label="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:title="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis" xlink:to="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis to ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_COFINSMember" xlink:label="csan_COFINSMember" xlink:title="csan_COFINSMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_COFINSMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_COFINSMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IcmsStateVatMember" xlink:label="csan_IcmsStateVatMember" xlink:title="csan_IcmsStateVatMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_IcmsStateVatMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_IcmsStateVatMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_INSSMember" xlink:label="csan_INSSMember" xlink:title="csan_INSSMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_INSSMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_INSSMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IOFMember" xlink:label="csan_IOFMember" xlink:title="csan_IOFMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_IOFMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_IOFMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ISSMember" xlink:label="csan_ISSMember" xlink:title="csan_ISSMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_ISSMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_ISSMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherTaxPayableMember" xlink:label="csan_OtherTaxPayableMember" xlink:title="csan_OtherTaxPayableMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_OtherTaxPayableMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_OtherTaxPayableMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PISMember" xlink:label="csan_PISMember" xlink:title="csan_PISMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_PISMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_PISMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_REFISMember" xlink:label="csan_REFISMember" xlink:title="csan_REFISMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_REFISMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_REFISMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:label="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_1" xlink:title="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis" xlink:to="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_1" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis to ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax" xlink:label="ifrs-full_NoncurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax" xlink:title="ifrs-full_NoncurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfOtherTaxesLineItems" xlink:to="ifrs-full_NoncurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax" xlink:title="Definition : csan_DisclosureOfOtherTaxesLineItems to ifrs-full_NoncurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherTaxPayable" xlink:label="csan_OtherTaxPayable" xlink:title="csan_OtherTaxPayable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfOtherTaxesLineItems" xlink:to="csan_OtherTaxPayable" xlink:title="Definition : csan_DisclosureOfOtherTaxesLineItems to csan_OtherTaxPayable" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/OtherTaxesPayableSummaryOfAmountsDueOnNonCurrentLiabilitiesAndMaturityScheduleDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfOtherTaxesLineItems" xlink:label="csan_DisclosureOfOtherTaxesLineItems" xlink:title="csan_DisclosureOfOtherTaxesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfOtherTaxesTable" xlink:label="csan_DisclosureOfOtherTaxesTable" xlink:title="csan_DisclosureOfOtherTaxesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfOtherTaxesLineItems" xlink:to="csan_DisclosureOfOtherTaxesTable" xlink:title="Definition : csan_DisclosureOfOtherTaxesLineItems to csan_DisclosureOfOtherTaxesTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MaturityAxis" xlink:label="ifrs-full_MaturityAxis" xlink:title="ifrs-full_MaturityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfOtherTaxesTable" xlink:to="ifrs-full_MaturityAxis" xlink:title="Definition : csan_DisclosureOfOtherTaxesTable to ifrs-full_MaturityAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember" xlink:title="ifrs-full_AggregatedTimeBandsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember" xlink:title="Definition : ifrs-full_MaturityAxis to ifrs-full_AggregatedTimeBandsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MaturityPeriodEightAndThereafterMember" xlink:label="csan_MaturityPeriodEightAndThereafterMember" xlink:title="csan_MaturityPeriodEightAndThereafterMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_MaturityPeriodEightAndThereafterMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_MaturityPeriodEightAndThereafterMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MaturityPeriodFiveMember" xlink:label="csan_MaturityPeriodFiveMember" xlink:title="csan_MaturityPeriodFiveMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_MaturityPeriodFiveMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_MaturityPeriodFiveMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MaturityPeriodFourMember" xlink:label="csan_MaturityPeriodFourMember" xlink:title="csan_MaturityPeriodFourMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_MaturityPeriodFourMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_MaturityPeriodFourMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MaturityPeriodOneMember" xlink:label="csan_MaturityPeriodOneMember" xlink:title="csan_MaturityPeriodOneMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_MaturityPeriodOneMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_MaturityPeriodOneMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MaturityPeriodSevenMember" xlink:label="csan_MaturityPeriodSevenMember" xlink:title="csan_MaturityPeriodSevenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_MaturityPeriodSevenMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_MaturityPeriodSevenMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MaturityPeriodSixMember" xlink:label="csan_MaturityPeriodSixMember" xlink:title="csan_MaturityPeriodSixMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_MaturityPeriodSixMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_MaturityPeriodSixMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MaturityPeriodThreeMember" xlink:label="csan_MaturityPeriodThreeMember" xlink:title="csan_MaturityPeriodThreeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_MaturityPeriodThreeMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_MaturityPeriodThreeMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MaturityPeriodTwoMember" xlink:label="csan_MaturityPeriodTwoMember" xlink:title="csan_MaturityPeriodTwoMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="csan_MaturityPeriodTwoMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to csan_MaturityPeriodTwoMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember_1" xlink:title="ifrs-full_AggregatedTimeBandsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember_1" xlink:title="Definition : ifrs-full_MaturityAxis to ifrs-full_AggregatedTimeBandsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax" xlink:label="ifrs-full_NoncurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax" xlink:title="ifrs-full_NoncurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfOtherTaxesLineItems" xlink:to="ifrs-full_NoncurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax" xlink:title="Definition : csan_DisclosureOfOtherTaxesLineItems to ifrs-full_NoncurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/IncomeTaxAndSocialContributionSummaryOfChangesInDeferredTaxDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems" xlink:label="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems" xlink:title="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable" xlink:label="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable" xlink:title="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis" xlink:label="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis" xlink:title="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:label="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:title="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis" xlink:to="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis to ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TaxLossAndNegativeBasisDeferredTaxAssetsMember" xlink:label="csan_TaxLossAndNegativeBasisDeferredTaxAssetsMember" xlink:title="csan_TaxLossAndNegativeBasisDeferredTaxAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_TaxLossAndNegativeBasisDeferredTaxAssetsMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_TaxLossAndNegativeBasisDeferredTaxAssetsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PostEmploymentObligationsDeferredTaxAssetsMember" xlink:label="csan_PostEmploymentObligationsDeferredTaxAssetsMember" xlink:title="csan_PostEmploymentObligationsDeferredTaxAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_PostEmploymentObligationsDeferredTaxAssetsMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_PostEmploymentObligationsDeferredTaxAssetsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EmployeeBenefitsDeferredTaxAssetsMember" xlink:label="csan_EmployeeBenefitsDeferredTaxAssetsMember" xlink:title="csan_EmployeeBenefitsDeferredTaxAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_EmployeeBenefitsDeferredTaxAssetsMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_EmployeeBenefitsDeferredTaxAssetsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ProvisionsDeferredTaxAssetsMember" xlink:label="csan_ProvisionsDeferredTaxAssetsMember" xlink:title="csan_ProvisionsDeferredTaxAssetsMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PropertyDeferredTaxAssetsMember" xlink:label="csan_PropertyDeferredTaxAssetsMember" xlink:title="csan_PropertyDeferredTaxAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_PropertyDeferredTaxAssetsMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_PropertyDeferredTaxAssetsMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherDeferredTaxAssetsMember" xlink:label="csan_OtherDeferredTaxAssetsMember" xlink:title="csan_OtherDeferredTaxAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_OtherDeferredTaxAssetsMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_OtherDeferredTaxAssetsMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_UnregisteredCreditsDeferredTaxAssetsMember" xlink:label="csan_UnregisteredCreditsDeferredTaxAssetsMember" xlink:title="csan_UnregisteredCreditsDeferredTaxAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_UnregisteredCreditsDeferredTaxAssetsMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_UnregisteredCreditsDeferredTaxAssetsMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DeferredTaxAssetsMember" xlink:label="csan_DeferredTaxAssetsMember" xlink:title="csan_DeferredTaxAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_DeferredTaxAssetsMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_DeferredTaxAssetsMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EffectsOnTheFormationOfJvSubsidiariesDeferredTaxLiabilitiesMember" xlink:label="csan_EffectsOnTheFormationOfJvSubsidiariesDeferredTaxLiabilitiesMember" xlink:title="csan_EffectsOnTheFormationOfJvSubsidiariesDeferredTaxLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_EffectsOnTheFormationOfJvSubsidiariesDeferredTaxLiabilitiesMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_EffectsOnTheFormationOfJvSubsidiariesDeferredTaxLiabilitiesMember" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IntangibleDeferredTaxLiabilitiesMember" xlink:label="csan_IntangibleDeferredTaxLiabilitiesMember" xlink:title="csan_IntangibleDeferredTaxLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_IntangibleDeferredTaxLiabilitiesMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_IntangibleDeferredTaxLiabilitiesMember" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_UnrealizedIncomeFromDerivativesDeferredTaxLiabilitiesMember" xlink:label="csan_UnrealizedIncomeFromDerivativesDeferredTaxLiabilitiesMember" xlink:title="csan_UnrealizedIncomeFromDerivativesDeferredTaxLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_UnrealizedIncomeFromDerivativesDeferredTaxLiabilitiesMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_UnrealizedIncomeFromDerivativesDeferredTaxLiabilitiesMember" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LeasesDeferredTaxLiabilitiesMember" xlink:label="csan_LeasesDeferredTaxLiabilitiesMember" xlink:title="csan_LeasesDeferredTaxLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_LeasesDeferredTaxLiabilitiesMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_LeasesDeferredTaxLiabilitiesMember" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DebtFairValueAdjustmentDeferredTaxLiabilitiesMember" xlink:label="csan_DebtFairValueAdjustmentDeferredTaxLiabilitiesMember" xlink:title="csan_DebtFairValueAdjustmentDeferredTaxLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_DebtFairValueAdjustmentDeferredTaxLiabilitiesMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_DebtFairValueAdjustmentDeferredTaxLiabilitiesMember" xlink:type="arc" use="optional" order="12" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherDeferredTaxLiabilitiesMember" xlink:label="csan_OtherDeferredTaxLiabilitiesMember" xlink:title="csan_OtherDeferredTaxLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_OtherDeferredTaxLiabilitiesMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_OtherDeferredTaxLiabilitiesMember" xlink:type="arc" use="optional" order="13" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_UnregisteredCreditsDeferredTaxLiabilitiesMember" xlink:label="csan_UnregisteredCreditsDeferredTaxLiabilitiesMember" xlink:title="csan_UnregisteredCreditsDeferredTaxLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_UnregisteredCreditsDeferredTaxLiabilitiesMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_UnregisteredCreditsDeferredTaxLiabilitiesMember" xlink:type="arc" use="optional" order="14" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DeferredTaxLiabilitiesMember" xlink:label="csan_DeferredTaxLiabilitiesMember" xlink:title="csan_DeferredTaxLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="csan_DeferredTaxLiabilitiesMember" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember to csan_DeferredTaxLiabilitiesMember" xlink:type="arc" use="optional" order="15" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:label="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_1" xlink:title="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis" xlink:to="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_1" xlink:title="Definition : ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis to ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:label="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:title="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable" xlink:to="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:title="Definition : ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable to ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RestatedMember" xlink:label="ifrs-full_RestatedMember" xlink:title="ifrs-full_RestatedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:to="ifrs-full_RestatedMember" xlink:title="Definition : ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis to ifrs-full_RestatedMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PreviouslyStatedMember" xlink:label="ifrs-full_PreviouslyStatedMember" xlink:title="ifrs-full_PreviouslyStatedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RestatedMember" xlink:to="ifrs-full_PreviouslyStatedMember" xlink:title="Definition : ifrs-full_RestatedMember to ifrs-full_PreviouslyStatedMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreaseDecreaseDueToApplicationOfIFRS9Member" xlink:label="csan_IncreaseDecreaseDueToApplicationOfIFRS9Member" xlink:title="csan_IncreaseDecreaseDueToApplicationOfIFRS9Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RestatedMember" xlink:to="csan_IncreaseDecreaseDueToApplicationOfIFRS9Member" xlink:title="Definition : ifrs-full_RestatedMember to csan_IncreaseDecreaseDueToApplicationOfIFRS9Member" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RestatedMember" xlink:label="ifrs-full_RestatedMember_1" xlink:title="ifrs-full_RestatedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:to="ifrs-full_RestatedMember_1" xlink:title="Definition : ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis to ifrs-full_RestatedMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract" xlink:label="ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract" xlink:title="ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems" xlink:to="ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract" xlink:title="Definition : ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems to ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity" xlink:label="ifrs-full_DeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity" xlink:title="ifrs-full_DeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract" xlink:to="ifrs-full_DeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity" xlink:title="Definition : ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract to ifrs-full_DeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreaseDecreaseThroughDiscontinuedOperationDeferredTaxLiabilityAsset" xlink:label="csan_IncreaseDecreaseThroughDiscontinuedOperationDeferredTaxLiabilityAsset" xlink:title="csan_IncreaseDecreaseThroughDiscontinuedOperationDeferredTaxLiabilityAsset"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract" xlink:to="csan_IncreaseDecreaseThroughDiscontinuedOperationDeferredTaxLiabilityAsset" xlink:title="Definition : ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract to csan_IncreaseDecreaseThroughDiscontinuedOperationDeferredTaxLiabilityAsset" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome" xlink:label="ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome" xlink:title="ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract" xlink:to="ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome" xlink:title="Definition : ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract to ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreaseDecreaseThroughAdoptionOfNewIfrsStandardDeferredTaxLiabilityAsset" xlink:label="csan_IncreaseDecreaseThroughAdoptionOfNewIfrsStandardDeferredTaxLiabilityAsset" xlink:title="csan_IncreaseDecreaseThroughAdoptionOfNewIfrsStandardDeferredTaxLiabilityAsset"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract" xlink:to="csan_IncreaseDecreaseThroughAdoptionOfNewIfrsStandardDeferredTaxLiabilityAsset" xlink:title="Definition : ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract to csan_IncreaseDecreaseThroughAdoptionOfNewIfrsStandardDeferredTaxLiabilityAsset" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset" xlink:label="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset" xlink:title="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract" xlink:to="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset" xlink:title="Definition : ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract to ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DeferredTaxLiabilityAsset" xlink:label="ifrs-full_DeferredTaxLiabilityAsset" xlink:title="ifrs-full_DeferredTaxLiabilityAsset"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract" xlink:to="ifrs-full_DeferredTaxLiabilityAsset" xlink:title="Definition : ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract to ifrs-full_DeferredTaxLiabilityAsset" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiabilityAsset" xlink:label="ifrs-full_IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiabilityAsset" xlink:title="ifrs-full_IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiabilityAsset"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract" xlink:to="ifrs-full_IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiabilityAsset" xlink:title="Definition : ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract to ifrs-full_IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiabilityAsset" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NetDeferredTaxAssets" xlink:label="ifrs-full_NetDeferredTaxAssets" xlink:title="ifrs-full_NetDeferredTaxAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract" xlink:to="ifrs-full_NetDeferredTaxAssets" xlink:title="Definition : ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract to ifrs-full_NetDeferredTaxAssets" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NetDeferredTaxLiabilities" xlink:label="ifrs-full_NetDeferredTaxLiabilities" xlink:title="ifrs-full_NetDeferredTaxLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract" xlink:to="ifrs-full_NetDeferredTaxLiabilities" xlink:title="Definition : ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract to ifrs-full_NetDeferredTaxLiabilities" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
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| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ProvisionForLegalProceedingsAndJudicialDepositsSummaryOfProvisionForLegalProceedingsAndJudicialDepositsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:label="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:title="ifrs-full_DisclosureOfOtherProvisionsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsTable" xlink:label="ifrs-full_DisclosureOfOtherProvisionsTable" xlink:title="ifrs-full_DisclosureOfOtherProvisionsTable"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfProvisionsAxis" xlink:label="ifrs-full_ClassesOfProvisionsAxis" xlink:title="ifrs-full_ClassesOfProvisionsAxis"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember" xlink:title="ifrs-full_OtherProvisionsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember" xlink:title="Definition : ifrs-full_ClassesOfProvisionsAxis to ifrs-full_OtherProvisionsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CivilEnvironmentalAndRegulatoryClaimsMember" xlink:label="csan_CivilEnvironmentalAndRegulatoryClaimsMember" xlink:title="csan_CivilEnvironmentalAndRegulatoryClaimsMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LegalProceedingsProvisionLaborMember" xlink:label="csan_LegalProceedingsProvisionLaborMember" xlink:title="csan_LegalProceedingsProvisionLaborMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="csan_LegalProceedingsProvisionLaborMember" xlink:title="Definition : ifrs-full_OtherProvisionsMember to csan_LegalProceedingsProvisionLaborMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LegalProceedingsProvisionTaxMember" xlink:label="csan_LegalProceedingsProvisionTaxMember" xlink:title="csan_LegalProceedingsProvisionTaxMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="csan_LegalProceedingsProvisionTaxMember" xlink:title="Definition : ifrs-full_OtherProvisionsMember to csan_LegalProceedingsProvisionTaxMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember_1" xlink:title="ifrs-full_OtherProvisionsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember_1" xlink:title="Definition : ifrs-full_ClassesOfProvisionsAxis to ifrs-full_OtherProvisionsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LongtermLegalProceedingsProvision" xlink:label="ifrs-full_LongtermLegalProceedingsProvision" xlink:title="ifrs-full_LongtermLegalProceedingsProvision"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="ifrs-full_LongtermLegalProceedingsProvision" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to ifrs-full_LongtermLegalProceedingsProvision" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MandatoryJudicialDepositsForLegalProceedings" xlink:label="csan_MandatoryJudicialDepositsForLegalProceedings" xlink:title="csan_MandatoryJudicialDepositsForLegalProceedings"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="csan_MandatoryJudicialDepositsForLegalProceedings" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to csan_MandatoryJudicialDepositsForLegalProceedings" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
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| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ProvisionForLegalProceedingsAndJudicialDepositsSummaryChangesInProvisionForLegalProceedingsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:label="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:title="ifrs-full_DisclosureOfOtherProvisionsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AdditionalProvisionsOtherProvisions" xlink:label="ifrs-full_AdditionalProvisionsOtherProvisions" xlink:title="ifrs-full_AdditionalProvisionsOtherProvisions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="ifrs-full_AdditionalProvisionsOtherProvisions" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to ifrs-full_AdditionalProvisionsOtherProvisions" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsTable" xlink:label="ifrs-full_DisclosureOfOtherProvisionsTable" xlink:title="ifrs-full_DisclosureOfOtherProvisionsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="ifrs-full_DisclosureOfOtherProvisionsTable" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to ifrs-full_DisclosureOfOtherProvisionsTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfProvisionsAxis" xlink:label="ifrs-full_ClassesOfProvisionsAxis" xlink:title="ifrs-full_ClassesOfProvisionsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOtherProvisionsTable" xlink:to="ifrs-full_ClassesOfProvisionsAxis" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsTable to ifrs-full_ClassesOfProvisionsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember" xlink:title="ifrs-full_OtherProvisionsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember" xlink:title="Definition : ifrs-full_ClassesOfProvisionsAxis to ifrs-full_OtherProvisionsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LegalProceedingsProvisionCivilEnvironmentalAndRegulatoryMember" xlink:label="csan_LegalProceedingsProvisionCivilEnvironmentalAndRegulatoryMember" xlink:title="csan_LegalProceedingsProvisionCivilEnvironmentalAndRegulatoryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="csan_LegalProceedingsProvisionCivilEnvironmentalAndRegulatoryMember" xlink:title="Definition : ifrs-full_OtherProvisionsMember to csan_LegalProceedingsProvisionCivilEnvironmentalAndRegulatoryMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LegalProceedingsProvisionLaborMember" xlink:label="csan_LegalProceedingsProvisionLaborMember" xlink:title="csan_LegalProceedingsProvisionLaborMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="csan_LegalProceedingsProvisionLaborMember" xlink:title="Definition : ifrs-full_OtherProvisionsMember to csan_LegalProceedingsProvisionLaborMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LegalProceedingsProvisionTaxMember" xlink:label="csan_LegalProceedingsProvisionTaxMember" xlink:title="csan_LegalProceedingsProvisionTaxMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="csan_LegalProceedingsProvisionTaxMember" xlink:title="Definition : ifrs-full_OtherProvisionsMember to csan_LegalProceedingsProvisionTaxMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember_1" xlink:title="ifrs-full_OtherProvisionsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember_1" xlink:title="Definition : ifrs-full_ClassesOfProvisionsAxis to ifrs-full_OtherProvisionsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions" xlink:label="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions" xlink:title="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions" xlink:label="ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions" xlink:title="ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LongtermLegalProceedingsProvision" xlink:label="ifrs-full_LongtermLegalProceedingsProvision" xlink:title="ifrs-full_LongtermLegalProceedingsProvision"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="ifrs-full_LongtermLegalProceedingsProvision" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to ifrs-full_LongtermLegalProceedingsProvision" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_UnusedProvisionReversedOtherProvisions" xlink:label="ifrs-full_UnusedProvisionReversedOtherProvisions" xlink:title="ifrs-full_UnusedProvisionReversedOtherProvisions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="ifrs-full_UnusedProvisionReversedOtherProvisions" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to ifrs-full_UnusedProvisionReversedOtherProvisions" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreaseDecreaseThroughInterestAndExchangeVariationOtherProvisions" xlink:label="csan_IncreaseDecreaseThroughInterestAndExchangeVariationOtherProvisions" xlink:title="csan_IncreaseDecreaseThroughInterestAndExchangeVariationOtherProvisions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="csan_IncreaseDecreaseThroughInterestAndExchangeVariationOtherProvisions" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to csan_IncreaseDecreaseThroughInterestAndExchangeVariationOtherProvisions" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreaseDecreaseThroughInterestOtherProvisions" xlink:label="csan_IncreaseDecreaseThroughInterestOtherProvisions" xlink:title="csan_IncreaseDecreaseThroughInterestOtherProvisions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="csan_IncreaseDecreaseThroughInterestOtherProvisions" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to csan_IncreaseDecreaseThroughInterestOtherProvisions" xlink:type="arc" order="7" xbrldt:closed="false"/> |
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| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ProvisionForLegalProceedingsAndJudicialDepositsSummaryOfPrincipalTaxProceedingsForWhichRiskOfLossIsProbableDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:label="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:title="ifrs-full_DisclosureOfOtherProvisionsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsTable" xlink:label="ifrs-full_DisclosureOfOtherProvisionsTable" xlink:title="ifrs-full_DisclosureOfOtherProvisionsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="ifrs-full_DisclosureOfOtherProvisionsTable" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to ifrs-full_DisclosureOfOtherProvisionsTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfProvisionsAxis" xlink:label="ifrs-full_ClassesOfProvisionsAxis" xlink:title="ifrs-full_ClassesOfProvisionsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOtherProvisionsTable" xlink:to="ifrs-full_ClassesOfProvisionsAxis" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsTable to ifrs-full_ClassesOfProvisionsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember" xlink:title="ifrs-full_OtherProvisionsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember" xlink:title="Definition : ifrs-full_ClassesOfProvisionsAxis to ifrs-full_OtherProvisionsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LegalProceedingsProvisionTaxMember" xlink:label="csan_LegalProceedingsProvisionTaxMember" xlink:title="csan_LegalProceedingsProvisionTaxMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="csan_LegalProceedingsProvisionTaxMember" xlink:title="Definition : ifrs-full_OtherProvisionsMember to csan_LegalProceedingsProvisionTaxMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember_1" xlink:title="ifrs-full_OtherProvisionsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember_1" xlink:title="Definition : ifrs-full_ClassesOfProvisionsAxis to ifrs-full_OtherProvisionsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_LitigationCaseAxis" xlink:label="srt_LitigationCaseAxis" xlink:title="srt_LitigationCaseAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOtherProvisionsTable" xlink:to="srt_LitigationCaseAxis" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsTable to srt_LitigationCaseAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_LitigationCaseTypeDomain" xlink:label="srt_LitigationCaseTypeDomain" xlink:title="srt_LitigationCaseTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_LitigationCaseAxis" xlink:to="srt_LitigationCaseTypeDomain" xlink:title="Definition : srt_LitigationCaseAxis to srt_LitigationCaseTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompensationWithFINSOCIALMember" xlink:label="csan_CompensationWithFINSOCIALMember" xlink:title="csan_CompensationWithFINSOCIALMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_LitigationCaseTypeDomain" xlink:to="csan_CompensationWithFINSOCIALMember" xlink:title="Definition : srt_LitigationCaseTypeDomain to csan_CompensationWithFINSOCIALMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FederalIncomeTaxesMember" xlink:label="csan_FederalIncomeTaxesMember" xlink:title="csan_FederalIncomeTaxesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_LitigationCaseTypeDomain" xlink:to="csan_FederalIncomeTaxesMember" xlink:title="Definition : srt_LitigationCaseTypeDomain to csan_FederalIncomeTaxesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_InssSocialSecurityContributionsMember" xlink:label="csan_InssSocialSecurityContributionsMember" xlink:title="csan_InssSocialSecurityContributionsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_LitigationCaseTypeDomain" xlink:to="csan_InssSocialSecurityContributionsMember" xlink:title="Definition : srt_LitigationCaseTypeDomain to csan_InssSocialSecurityContributionsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IpiExciseTaxCreditNtMember" xlink:label="csan_IpiExciseTaxCreditNtMember" xlink:title="csan_IpiExciseTaxCreditNtMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_LitigationCaseTypeDomain" xlink:to="csan_IpiExciseTaxCreditNtMember" xlink:title="Definition : srt_LitigationCaseTypeDomain to csan_IpiExciseTaxCreditNtMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherClaimsMember" xlink:label="csan_OtherClaimsMember" xlink:title="csan_OtherClaimsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_LitigationCaseTypeDomain" xlink:to="csan_OtherClaimsMember" xlink:title="Definition : srt_LitigationCaseTypeDomain to csan_OtherClaimsMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PisAndCofinsMember" xlink:label="csan_PisAndCofinsMember" xlink:title="csan_PisAndCofinsMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StateVatIcmsCreditsMember" xlink:label="csan_StateVatIcmsCreditsMember" xlink:title="csan_StateVatIcmsCreditsMember"/> |
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| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_LitigationCaseAxis" xlink:to="srt_LitigationCaseTypeDomain_1" xlink:title="Definition : srt_LitigationCaseAxis to srt_LitigationCaseTypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LongtermLegalProceedingsProvision" xlink:label="ifrs-full_LongtermLegalProceedingsProvision" xlink:title="ifrs-full_LongtermLegalProceedingsProvision"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="ifrs-full_LongtermLegalProceedingsProvision" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to ifrs-full_LongtermLegalProceedingsProvision" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
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| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ProvisionForLegalProceedingsAndJudicialDepositsAdditionalInformationDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:label="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:title="ifrs-full_DisclosureOfOtherProvisionsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompensationForMoralDamages" xlink:label="csan_CompensationForMoralDamages" xlink:title="csan_CompensationForMoralDamages"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="csan_CompensationForMoralDamages" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to csan_CompensationForMoralDamages" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsTable" xlink:label="ifrs-full_DisclosureOfOtherProvisionsTable" xlink:title="ifrs-full_DisclosureOfOtherProvisionsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="ifrs-full_DisclosureOfOtherProvisionsTable" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to ifrs-full_DisclosureOfOtherProvisionsTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfProvisionsAxis" xlink:label="ifrs-full_ClassesOfProvisionsAxis" xlink:title="ifrs-full_ClassesOfProvisionsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOtherProvisionsTable" xlink:to="ifrs-full_ClassesOfProvisionsAxis" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsTable to ifrs-full_ClassesOfProvisionsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember" xlink:title="ifrs-full_OtherProvisionsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember" xlink:title="Definition : ifrs-full_ClassesOfProvisionsAxis to ifrs-full_OtherProvisionsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LegalProceedingsProvisionMember" xlink:label="ifrs-full_LegalProceedingsProvisionMember" xlink:title="ifrs-full_LegalProceedingsProvisionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="ifrs-full_LegalProceedingsProvisionMember" xlink:title="Definition : ifrs-full_OtherProvisionsMember to ifrs-full_LegalProceedingsProvisionMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LegalProceedingsProvisionTaxMember" xlink:label="csan_LegalProceedingsProvisionTaxMember" xlink:title="csan_LegalProceedingsProvisionTaxMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="csan_LegalProceedingsProvisionTaxMember" xlink:title="Definition : ifrs-full_OtherProvisionsMember to csan_LegalProceedingsProvisionTaxMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CivilEnvironmentalAndRegulatoryMember" xlink:label="csan_CivilEnvironmentalAndRegulatoryMember" xlink:title="csan_CivilEnvironmentalAndRegulatoryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="csan_CivilEnvironmentalAndRegulatoryMember" xlink:title="Definition : ifrs-full_OtherProvisionsMember to csan_CivilEnvironmentalAndRegulatoryMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LegalProceedingsProvisionLaborMember" xlink:label="csan_LegalProceedingsProvisionLaborMember" xlink:title="csan_LegalProceedingsProvisionLaborMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="csan_LegalProceedingsProvisionLaborMember" xlink:title="Definition : ifrs-full_OtherProvisionsMember to csan_LegalProceedingsProvisionLaborMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember_1" xlink:title="ifrs-full_OtherProvisionsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember_1" xlink:title="Definition : ifrs-full_ClassesOfProvisionsAxis to ifrs-full_OtherProvisionsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOtherProvisionsTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoSAMember" xlink:label="csan_RumoSAMember" xlink:title="csan_RumoSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfInterestRatesAxis" xlink:label="ifrs-full_TypesOfInterestRatesAxis" xlink:title="ifrs-full_TypesOfInterestRatesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOtherProvisionsTable" xlink:to="ifrs-full_TypesOfInterestRatesAxis" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsTable to ifrs-full_TypesOfInterestRatesAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateTypesMember" xlink:label="ifrs-full_InterestRateTypesMember" xlink:title="ifrs-full_InterestRateTypesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfInterestRatesAxis" xlink:to="ifrs-full_InterestRateTypesMember" xlink:title="Definition : ifrs-full_TypesOfInterestRatesAxis to ifrs-full_InterestRateTypesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NonHomologationOfOffsettingOfTaxCreditMember" xlink:label="csan_NonHomologationOfOffsettingOfTaxCreditMember" xlink:title="csan_NonHomologationOfOffsettingOfTaxCreditMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_NonHomologationOfOffsettingOfTaxCreditMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_NonHomologationOfOffsettingOfTaxCreditMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PisAndCofinsMember" xlink:label="csan_PisAndCofinsMember" xlink:title="csan_PisAndCofinsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_PisAndCofinsMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_PisAndCofinsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateTypesMember" xlink:label="ifrs-full_InterestRateTypesMember_1" xlink:title="ifrs-full_InterestRateTypesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfInterestRatesAxis" xlink:to="ifrs-full_InterestRateTypesMember_1" xlink:title="Definition : ifrs-full_TypesOfInterestRatesAxis to ifrs-full_InterestRateTypesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_LitigationCaseAxis" xlink:label="srt_LitigationCaseAxis" xlink:title="srt_LitigationCaseAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfOtherProvisionsTable" xlink:to="srt_LitigationCaseAxis" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsTable to srt_LitigationCaseAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_LitigationCaseTypeDomain" xlink:label="srt_LitigationCaseTypeDomain" xlink:title="srt_LitigationCaseTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_LitigationCaseAxis" xlink:to="srt_LitigationCaseTypeDomain" xlink:title="Definition : srt_LitigationCaseAxis to srt_LitigationCaseTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompensationWithFinsocialMember" xlink:label="csan_CompensationWithFinsocialMember" xlink:title="csan_CompensationWithFinsocialMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_LitigationCaseTypeDomain" xlink:to="csan_CompensationWithFinsocialMember" xlink:title="Definition : srt_LitigationCaseTypeDomain to csan_CompensationWithFinsocialMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StateVatIcmsCreditsMember" xlink:label="csan_StateVatIcmsCreditsMember" xlink:title="csan_StateVatIcmsCreditsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_LitigationCaseTypeDomain" xlink:to="csan_StateVatIcmsCreditsMember" xlink:title="Definition : srt_LitigationCaseTypeDomain to csan_StateVatIcmsCreditsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_LitigationCaseTypeDomain" xlink:label="srt_LitigationCaseTypeDomain_1" xlink:title="srt_LitigationCaseTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_LitigationCaseAxis" xlink:to="srt_LitigationCaseTypeDomain_1" xlink:title="Definition : srt_LitigationCaseAxis to srt_LitigationCaseTypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FederalAndProvincialIncomeTaxRate" xlink:label="csan_FederalAndProvincialIncomeTaxRate" xlink:title="csan_FederalAndProvincialIncomeTaxRate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="csan_FederalAndProvincialIncomeTaxRate" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to csan_FederalAndProvincialIncomeTaxRate" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IsolatedFineRateOfAcquiredAssets" xlink:label="csan_IsolatedFineRateOfAcquiredAssets" xlink:title="csan_IsolatedFineRateOfAcquiredAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="csan_IsolatedFineRateOfAcquiredAssets" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to csan_IsolatedFineRateOfAcquiredAssets" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SocialSecurityPercentage" xlink:label="csan_SocialSecurityPercentage" xlink:title="csan_SocialSecurityPercentage"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="csan_SocialSecurityPercentage" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to csan_SocialSecurityPercentage" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NewProvisionsOtherProvisions" xlink:label="ifrs-full_NewProvisionsOtherProvisions" xlink:title="ifrs-full_NewProvisionsOtherProvisions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="ifrs-full_NewProvisionsOtherProvisions" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to ifrs-full_NewProvisionsOtherProvisions" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LongtermLegalProceedingsProvision" xlink:label="ifrs-full_LongtermLegalProceedingsProvision" xlink:title="ifrs-full_LongtermLegalProceedingsProvision"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="ifrs-full_LongtermLegalProceedingsProvision" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to ifrs-full_LongtermLegalProceedingsProvision" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MandatoryJudicialDepositsForLegalProceeding" xlink:label="csan_MandatoryJudicialDepositsForLegalProceeding" xlink:title="csan_MandatoryJudicialDepositsForLegalProceeding"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="csan_MandatoryJudicialDepositsForLegalProceeding" xlink:title="Definition : ifrs-full_DisclosureOfOtherProvisionsLineItems to csan_MandatoryJudicialDepositsForLegalProceeding" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ProvisionForLegalProceedingsAndJudicialDepositsSummaryOfPrincipalProceedingsForWhichDeemRiskOfLossAsPossibleDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfContingentLiabilitiesLineItems" xlink:label="ifrs-full_DisclosureOfContingentLiabilitiesLineItems" xlink:title="ifrs-full_DisclosureOfContingentLiabilitiesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfContingentLiabilitiesTable" xlink:label="ifrs-full_DisclosureOfContingentLiabilitiesTable" xlink:title="ifrs-full_DisclosureOfContingentLiabilitiesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfContingentLiabilitiesLineItems" xlink:to="ifrs-full_DisclosureOfContingentLiabilitiesTable" xlink:title="Definition : ifrs-full_DisclosureOfContingentLiabilitiesLineItems to ifrs-full_DisclosureOfContingentLiabilitiesTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CategoriesOfContingentLiabilitiesAxis" xlink:label="csan_CategoriesOfContingentLiabilitiesAxis" xlink:title="csan_CategoriesOfContingentLiabilitiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfContingentLiabilitiesTable" xlink:to="csan_CategoriesOfContingentLiabilitiesAxis" xlink:title="Definition : ifrs-full_DisclosureOfContingentLiabilitiesTable to csan_CategoriesOfContingentLiabilitiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CategoriesOfContingentLiabilitiesDomain" xlink:label="csan_CategoriesOfContingentLiabilitiesDomain" xlink:title="csan_CategoriesOfContingentLiabilitiesDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_CategoriesOfContingentLiabilitiesAxis" xlink:to="csan_CategoriesOfContingentLiabilitiesDomain" xlink:title="Definition : csan_CategoriesOfContingentLiabilitiesAxis to csan_CategoriesOfContingentLiabilitiesDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LegalProceedingsContingentLiabilityCivilRegulatoryAndEnvironmentalMember" xlink:label="csan_LegalProceedingsContingentLiabilityCivilRegulatoryAndEnvironmentalMember" xlink:title="csan_LegalProceedingsContingentLiabilityCivilRegulatoryAndEnvironmentalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_CategoriesOfContingentLiabilitiesDomain" xlink:to="csan_LegalProceedingsContingentLiabilityCivilRegulatoryAndEnvironmentalMember" xlink:title="Definition : csan_CategoriesOfContingentLiabilitiesDomain to csan_LegalProceedingsContingentLiabilityCivilRegulatoryAndEnvironmentalMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CategoriesOfContingentLiabilitiesDomain" xlink:label="csan_CategoriesOfContingentLiabilitiesDomain_1" xlink:title="csan_CategoriesOfContingentLiabilitiesDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_CategoriesOfContingentLiabilitiesAxis" xlink:to="csan_CategoriesOfContingentLiabilitiesDomain_1" xlink:title="Definition : csan_CategoriesOfContingentLiabilitiesAxis to csan_CategoriesOfContingentLiabilitiesDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfContingentLiabilitiesAxis" xlink:label="ifrs-full_ClassesOfContingentLiabilitiesAxis" xlink:title="ifrs-full_ClassesOfContingentLiabilitiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfContingentLiabilitiesTable" xlink:to="ifrs-full_ClassesOfContingentLiabilitiesAxis" xlink:title="Definition : ifrs-full_DisclosureOfContingentLiabilitiesTable to ifrs-full_ClassesOfContingentLiabilitiesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContingentLiabilitiesMember" xlink:label="ifrs-full_ContingentLiabilitiesMember" xlink:title="ifrs-full_ContingentLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfContingentLiabilitiesAxis" xlink:to="ifrs-full_ContingentLiabilitiesMember" xlink:title="Definition : ifrs-full_ClassesOfContingentLiabilitiesAxis to ifrs-full_ContingentLiabilitiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LegalProceedingsContingentLiabilityTaxMember" xlink:label="csan_LegalProceedingsContingentLiabilityTaxMember" xlink:title="csan_LegalProceedingsContingentLiabilityTaxMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ContingentLiabilitiesMember" xlink:to="csan_LegalProceedingsContingentLiabilityTaxMember" xlink:title="Definition : ifrs-full_ContingentLiabilitiesMember to csan_LegalProceedingsContingentLiabilityTaxMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContingentLiabilitiesMember" xlink:label="ifrs-full_ContingentLiabilitiesMember_1" xlink:title="ifrs-full_ContingentLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfContingentLiabilitiesAxis" xlink:to="ifrs-full_ContingentLiabilitiesMember_1" xlink:title="Definition : ifrs-full_ClassesOfContingentLiabilitiesAxis to ifrs-full_ContingentLiabilitiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LitigationCase1Axis" xlink:label="csan_LitigationCase1Axis" xlink:title="csan_LitigationCase1Axis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfContingentLiabilitiesTable" xlink:to="csan_LitigationCase1Axis" xlink:title="Definition : ifrs-full_DisclosureOfContingentLiabilitiesTable to csan_LitigationCase1Axis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LitigationCase1Member" xlink:label="csan_LitigationCase1Member" xlink:title="csan_LitigationCase1Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_LitigationCase1Axis" xlink:to="csan_LitigationCase1Member" xlink:title="Definition : csan_LitigationCase1Axis to csan_LitigationCase1Member" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CivilMember" xlink:label="csan_CivilMember" xlink:title="csan_CivilMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_CivilMember" xlink:title="Definition : csan_LitigationCase1Member to csan_CivilMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompensationWithIpiIn6798Member" xlink:label="csan_CompensationWithIpiIn6798Member" xlink:title="csan_CompensationWithIpiIn6798Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_CompensationWithIpiIn6798Member" xlink:title="Definition : csan_LitigationCase1Member to csan_CompensationWithIpiIn6798Member" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EnvironmentalMember" xlink:label="csan_EnvironmentalMember" xlink:title="csan_EnvironmentalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_EnvironmentalMember" xlink:title="Definition : csan_LitigationCase1Member to csan_EnvironmentalMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FederalIncomeTaxesMember" xlink:label="csan_FederalIncomeTaxesMember" xlink:title="csan_FederalIncomeTaxesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_FederalIncomeTaxesMember" xlink:title="Definition : csan_LitigationCase1Member to csan_FederalIncomeTaxesMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FinancialTransactionsTaxOnLoanMember" xlink:label="csan_FinancialTransactionsTaxOnLoanMember" xlink:title="csan_FinancialTransactionsTaxOnLoanMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_FinancialTransactionsTaxOnLoanMember" xlink:title="Definition : csan_LitigationCase1Member to csan_FinancialTransactionsTaxOnLoanMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ForeignFinancialOperationMember" xlink:label="csan_ForeignFinancialOperationMember" xlink:title="csan_ForeignFinancialOperationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_ForeignFinancialOperationMember" xlink:title="Definition : csan_LitigationCase1Member to csan_ForeignFinancialOperationMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GoodwillRumoMember" xlink:label="csan_GoodwillRumoMember" xlink:title="csan_GoodwillRumoMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_GoodwillRumoMember" xlink:title="Definition : csan_LitigationCase1Member to csan_GoodwillRumoMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IcmsStateVatMember" xlink:label="csan_IcmsStateVatMember" xlink:title="csan_IcmsStateVatMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_IcmsStateVatMember" xlink:title="Definition : csan_LitigationCase1Member to csan_IcmsStateVatMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_InssSocialSecurityAndOtherMember" xlink:label="csan_InssSocialSecurityAndOtherMember" xlink:title="csan_InssSocialSecurityAndOtherMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_InssSocialSecurityAndOtherMember" xlink:title="Definition : csan_LitigationCase1Member to csan_InssSocialSecurityAndOtherMember" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IpiExciseTaxCreditNtMember" xlink:label="csan_IpiExciseTaxCreditNtMember" xlink:title="csan_IpiExciseTaxCreditNtMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_IpiExciseTaxCreditNtMember" xlink:title="Definition : csan_LitigationCase1Member to csan_IpiExciseTaxCreditNtMember" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IrrfWithholdingTaxMember" xlink:label="csan_IrrfWithholdingTaxMember" xlink:title="csan_IrrfWithholdingTaxMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_IrrfWithholdingTaxMember" xlink:title="Definition : csan_LitigationCase1Member to csan_IrrfWithholdingTaxMember" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LaborMember" xlink:label="csan_LaborMember" xlink:title="csan_LaborMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_LaborMember" xlink:title="Definition : csan_LitigationCase1Member to csan_LaborMember" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_Mp470TaxInstallmentsMember" xlink:label="csan_Mp470TaxInstallmentsMember" xlink:title="csan_Mp470TaxInstallmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_Mp470TaxInstallmentsMember" xlink:title="Definition : csan_LitigationCase1Member to csan_Mp470TaxInstallmentsMember" xlink:type="arc" use="optional" order="12" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherClaimsMember" xlink:label="csan_OtherClaimsMember" xlink:title="csan_OtherClaimsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_OtherClaimsMember" xlink:title="Definition : csan_LitigationCase1Member to csan_OtherClaimsMember" xlink:type="arc" use="optional" order="13" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PenaltiesRelatedToTaxPositionsMember" xlink:label="csan_PenaltiesRelatedToTaxPositionsMember" xlink:title="csan_PenaltiesRelatedToTaxPositionsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_PenaltiesRelatedToTaxPositionsMember" xlink:title="Definition : csan_LitigationCase1Member to csan_PenaltiesRelatedToTaxPositionsMember" xlink:type="arc" use="optional" order="14" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PisAndCofinsRevenueTaxesMember" xlink:label="csan_PisAndCofinsRevenueTaxesMember" xlink:title="csan_PisAndCofinsRevenueTaxesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_PisAndCofinsRevenueTaxesMember" xlink:title="Definition : csan_LitigationCase1Member to csan_PisAndCofinsRevenueTaxesMember" xlink:type="arc" use="optional" order="15" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RegulatoryMember" xlink:label="csan_RegulatoryMember" xlink:title="csan_RegulatoryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_RegulatoryMember" xlink:title="Definition : csan_LitigationCase1Member to csan_RegulatoryMember" xlink:type="arc" use="optional" order="16" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StockOptionClaimsMember" xlink:label="csan_StockOptionClaimsMember" xlink:title="csan_StockOptionClaimsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_StockOptionClaimsMember" xlink:title="Definition : csan_LitigationCase1Member to csan_StockOptionClaimsMember" xlink:type="arc" use="optional" order="17" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TaxMember" xlink:label="csan_TaxMember" xlink:title="csan_TaxMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_LitigationCase1Member" xlink:to="csan_TaxMember" xlink:title="Definition : csan_LitigationCase1Member to csan_TaxMember" xlink:type="arc" use="optional" order="18" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LitigationCase1Member" xlink:label="csan_LitigationCase1Member_1" xlink:title="csan_LitigationCase1Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_LitigationCase1Axis" xlink:to="csan_LitigationCase1Member_1" xlink:title="Definition : csan_LitigationCase1Axis to csan_LitigationCase1Member" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EstimatedFinancialEffectOfContingentLiabilities" xlink:label="ifrs-full_EstimatedFinancialEffectOfContingentLiabilities" xlink:title="ifrs-full_EstimatedFinancialEffectOfContingentLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfContingentLiabilitiesLineItems" xlink:to="ifrs-full_EstimatedFinancialEffectOfContingentLiabilities" xlink:title="Definition : ifrs-full_DisclosureOfContingentLiabilitiesLineItems to ifrs-full_EstimatedFinancialEffectOfContingentLiabilities" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ShareholdersEquitySummaryOfShareCapitalDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:label="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:title="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:label="ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:title="ifrs-full_DisclosureOfClassesOfShareCapitalTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis" xlink:label="ifrs-full_ClassesOfShareCapitalAxis" xlink:title="ifrs-full_ClassesOfShareCapitalAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:to="ifrs-full_ClassesOfShareCapitalAxis" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalTable to ifrs-full_ClassesOfShareCapitalAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember" xlink:title="ifrs-full_ClassesOfShareCapitalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalAxis to ifrs-full_ClassesOfShareCapitalMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ClassASharesMember" xlink:label="csan_ClassASharesMember" xlink:title="csan_ClassASharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="csan_ClassASharesMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalMember to csan_ClassASharesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ClassBOneSharesMember" xlink:label="csan_ClassBOneSharesMember" xlink:title="csan_ClassBOneSharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="csan_ClassBOneSharesMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalMember to csan_ClassBOneSharesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember_1" xlink:title="ifrs-full_ClassesOfShareCapitalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember_1" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalAxis to ifrs-full_ClassesOfShareCapitalMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:title="dei_LegalEntityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:to="dei_LegalEntityAxis" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalTable to dei_LegalEntityAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ControlingGroupMember" xlink:label="csan_ControlingGroupMember" xlink:title="csan_ControlingGroupMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_ControlingGroupMember" xlink:title="Definition : dei_EntityDomain to csan_ControlingGroupMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EastspringInvestmentsSingaporeLimitedMember" xlink:label="csan_EastspringInvestmentsSingaporeLimitedMember" xlink:title="csan_EastspringInvestmentsSingaporeLimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_EastspringInvestmentsSingaporeLimitedMember" xlink:title="Definition : dei_EntityDomain to csan_EastspringInvestmentsSingaporeLimitedMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MAndGInvestmentManagementLimitedMember" xlink:label="csan_MAndGInvestmentManagementLimitedMember" xlink:title="csan_MAndGInvestmentManagementLimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_MAndGInvestmentManagementLimitedMember" xlink:title="Definition : dei_EntityDomain to csan_MAndGInvestmentManagementLimitedMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RenaissanceTechnologiesLlcMember" xlink:label="csan_RenaissanceTechnologiesLlcMember" xlink:title="csan_RenaissanceTechnologiesLlcMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_RenaissanceTechnologiesLlcMember" xlink:title="Definition : dei_EntityDomain to csan_RenaissanceTechnologiesLlcMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherMember" xlink:label="csan_OtherMember" xlink:title="csan_OtherMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_OtherMember" xlink:title="Definition : dei_EntityDomain to csan_OtherMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain_1" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain_1" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TradingStatusOfStockAxis" xlink:label="csan_TradingStatusOfStockAxis" xlink:title="csan_TradingStatusOfStockAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:to="csan_TradingStatusOfStockAxis" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalTable to csan_TradingStatusOfStockAxis" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TradingStatusOfStockDomain" xlink:label="csan_TradingStatusOfStockDomain" xlink:title="csan_TradingStatusOfStockDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_TradingStatusOfStockAxis" xlink:to="csan_TradingStatusOfStockDomain" xlink:title="Definition : csan_TradingStatusOfStockAxis to csan_TradingStatusOfStockDomain" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FreeFloatMember" xlink:label="csan_FreeFloatMember" xlink:title="csan_FreeFloatMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_TradingStatusOfStockDomain" xlink:to="csan_FreeFloatMember" xlink:title="Definition : csan_TradingStatusOfStockDomain to csan_FreeFloatMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TradingStatusOfStockDomain" xlink:label="csan_TradingStatusOfStockDomain_1" xlink:title="csan_TradingStatusOfStockDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_TradingStatusOfStockAxis" xlink:to="csan_TradingStatusOfStockDomain_1" xlink:title="Definition : csan_TradingStatusOfStockAxis to csan_TradingStatusOfStockDomain" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfSharesIssued" xlink:label="ifrs-full_NumberOfSharesIssued" xlink:title="ifrs-full_NumberOfSharesIssued"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="ifrs-full_NumberOfSharesIssued" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to ifrs-full_NumberOfSharesIssued" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfSharesOutstanding" xlink:label="ifrs-full_NumberOfSharesOutstanding" xlink:title="ifrs-full_NumberOfSharesOutstanding"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="ifrs-full_NumberOfSharesOutstanding" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to ifrs-full_NumberOfSharesOutstanding" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfSharesIssued" xlink:label="csan_PercentageOfSharesIssued" xlink:title="csan_PercentageOfSharesIssued"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="csan_PercentageOfSharesIssued" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to csan_PercentageOfSharesIssued" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfSharesOutstanding" xlink:label="csan_PercentageOfSharesOutstanding" xlink:title="csan_PercentageOfSharesOutstanding"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="csan_PercentageOfSharesOutstanding" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to csan_PercentageOfSharesOutstanding" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfTreasuryShares" xlink:label="csan_PercentageOfTreasuryShares" xlink:title="csan_PercentageOfTreasuryShares"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="csan_PercentageOfTreasuryShares" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to csan_PercentageOfTreasuryShares" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TreasurySharesShares" xlink:label="csan_TreasurySharesShares" xlink:title="csan_TreasurySharesShares"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="csan_TreasurySharesShares" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to csan_TreasurySharesShares" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ShareholdersEquitySummaryOfOtherComprehensiveLossIncomeDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems" xlink:label="ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems" xlink:title="ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable" xlink:label="ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable" xlink:title="ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems" xlink:to="ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable" xlink:title="Definition : ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems to ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ComponentsOfEquityAxis" xlink:label="ifrs-full_ComponentsOfEquityAxis" xlink:title="ifrs-full_ComponentsOfEquityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable" xlink:to="ifrs-full_ComponentsOfEquityAxis" xlink:title="Definition : ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable to ifrs-full_ComponentsOfEquityAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EquityMember" xlink:label="ifrs-full_EquityMember" xlink:title="ifrs-full_EquityMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ComponentsOfEquityAxis" xlink:to="ifrs-full_EquityMember" xlink:title="Definition : ifrs-full_ComponentsOfEquityAxis to ifrs-full_EquityMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AccumulatedOtherComprehensiveIncomeIncludingNoncontrollingInterestsMember" xlink:label="csan_AccumulatedOtherComprehensiveIncomeIncludingNoncontrollingInterestsMember" xlink:title="csan_AccumulatedOtherComprehensiveIncomeIncludingNoncontrollingInterestsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="csan_AccumulatedOtherComprehensiveIncomeIncludingNoncontrollingInterestsMember" xlink:title="Definition : ifrs-full_EquityMember to csan_AccumulatedOtherComprehensiveIncomeIncludingNoncontrollingInterestsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AccumulatedOtherComprehensiveIncomeLossFinancialInstrumentsWithSubsidiariesMember" xlink:label="csan_AccumulatedOtherComprehensiveIncomeLossFinancialInstrumentsWithSubsidiariesMember" xlink:title="csan_AccumulatedOtherComprehensiveIncomeLossFinancialInstrumentsWithSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="csan_AccumulatedOtherComprehensiveIncomeLossFinancialInstrumentsWithSubsidiariesMember" xlink:title="Definition : ifrs-full_EquityMember to csan_AccumulatedOtherComprehensiveIncomeLossFinancialInstrumentsWithSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AccumulatedOtherComprehensiveIncomeMember" xlink:label="ifrs-full_AccumulatedOtherComprehensiveIncomeMember" xlink:title="ifrs-full_AccumulatedOtherComprehensiveIncomeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_AccumulatedOtherComprehensiveIncomeMember" xlink:title="Definition : ifrs-full_EquityMember to ifrs-full_AccumulatedOtherComprehensiveIncomeMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AccumulatedOtherComprehensiveLossActuarialGainLossMember" xlink:label="csan_AccumulatedOtherComprehensiveLossActuarialGainLossMember" xlink:title="csan_AccumulatedOtherComprehensiveLossActuarialGainLossMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="csan_AccumulatedOtherComprehensiveLossActuarialGainLossMember" xlink:title="Definition : ifrs-full_EquityMember to csan_AccumulatedOtherComprehensiveLossActuarialGainLossMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AccumulatedOtherComprehensiveLossChangesInFairValueOfFinancialAssetsMember" xlink:label="csan_AccumulatedOtherComprehensiveLossChangesInFairValueOfFinancialAssetsMember" xlink:title="csan_AccumulatedOtherComprehensiveLossChangesInFairValueOfFinancialAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="csan_AccumulatedOtherComprehensiveLossChangesInFairValueOfFinancialAssetsMember" xlink:title="Definition : ifrs-full_EquityMember to csan_AccumulatedOtherComprehensiveLossChangesInFairValueOfFinancialAssetsMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AccumulatedOtherComprehensiveLossCumulativeTranslationAdjustmentMember" xlink:label="csan_AccumulatedOtherComprehensiveLossCumulativeTranslationAdjustmentMember" xlink:title="csan_AccumulatedOtherComprehensiveLossCumulativeTranslationAdjustmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="csan_AccumulatedOtherComprehensiveLossCumulativeTranslationAdjustmentMember" xlink:title="Definition : ifrs-full_EquityMember to csan_AccumulatedOtherComprehensiveLossCumulativeTranslationAdjustmentMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AccumulatedOtherComprehensiveLossGainOnCashFlowHedgeInJointVenturesAndmemberMember" xlink:label="csan_AccumulatedOtherComprehensiveLossGainOnCashFlowHedgeInJointVenturesAndmemberMember" xlink:title="csan_AccumulatedOtherComprehensiveLossGainOnCashFlowHedgeInJointVenturesAndmemberMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="csan_AccumulatedOtherComprehensiveLossGainOnCashFlowHedgeInJointVenturesAndmemberMember" xlink:title="Definition : ifrs-full_EquityMember to csan_AccumulatedOtherComprehensiveLossGainOnCashFlowHedgeInJointVenturesAndmemberMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AociAttributableToNoncontrollingInterest1Member" xlink:label="csan_AociAttributableToNoncontrollingInterest1Member" xlink:title="csan_AociAttributableToNoncontrollingInterest1Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="csan_AociAttributableToNoncontrollingInterest1Member" xlink:title="Definition : ifrs-full_EquityMember to csan_AociAttributableToNoncontrollingInterest1Member" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AccumulatedOtherComprehensiveGainOnCashFlowHedgeInJointVenturesMember" xlink:label="csan_AccumulatedOtherComprehensiveGainOnCashFlowHedgeInJointVenturesMember" xlink:title="csan_AccumulatedOtherComprehensiveGainOnCashFlowHedgeInJointVenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="csan_AccumulatedOtherComprehensiveGainOnCashFlowHedgeInJointVenturesMember" xlink:title="Definition : ifrs-full_EquityMember to csan_AccumulatedOtherComprehensiveGainOnCashFlowHedgeInJointVenturesMember" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AccumulatedOtherComprehensiveIncomeGainLossOnCashFlowHedgeMember" xlink:label="csan_AccumulatedOtherComprehensiveIncomeGainLossOnCashFlowHedgeMember" xlink:title="csan_AccumulatedOtherComprehensiveIncomeGainLossOnCashFlowHedgeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="csan_AccumulatedOtherComprehensiveIncomeGainLossOnCashFlowHedgeMember" xlink:title="Definition : ifrs-full_EquityMember to csan_AccumulatedOtherComprehensiveIncomeGainLossOnCashFlowHedgeMember" xlink:type="arc" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EquityMember" xlink:label="ifrs-full_EquityMember_1" xlink:title="ifrs-full_EquityMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ComponentsOfEquityAxis" xlink:to="ifrs-full_EquityMember_1" xlink:title="Definition : ifrs-full_ComponentsOfEquityAxis to ifrs-full_EquityMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Equity" xlink:label="ifrs-full_Equity" xlink:title="ifrs-full_Equity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems" xlink:to="ifrs-full_Equity" xlink:title="Definition : ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems to ifrs-full_Equity" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherComprehensiveIncome" xlink:label="ifrs-full_OtherComprehensiveIncome" xlink:title="ifrs-full_OtherComprehensiveIncome"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems" xlink:to="ifrs-full_OtherComprehensiveIncome" xlink:title="Definition : ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems to ifrs-full_OtherComprehensiveIncome" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/NetSalesRevenueDisaggregatedByProductsAndServiceLinesAndTimingOfRevenueRecognitionDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems" xlink:label="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems" xlink:title="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable" xlink:label="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable" xlink:title="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems" xlink:to="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable" xlink:title="Definition : ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems to ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="ifrs-full_CategoriesOfRelatedPartiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="Definition : ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable to ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesAxis" xlink:label="ifrs-full_ProductsAndServicesAxis" xlink:title="ifrs-full_ProductsAndServicesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable" xlink:to="ifrs-full_ProductsAndServicesAxis" xlink:title="Definition : ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable to ifrs-full_ProductsAndServicesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesMember" xlink:label="ifrs-full_ProductsAndServicesMember" xlink:title="ifrs-full_ProductsAndServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ProductsAndServicesAxis" xlink:to="ifrs-full_ProductsAndServicesMember" xlink:title="Definition : ifrs-full_ProductsAndServicesAxis to ifrs-full_ProductsAndServicesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ConstructionRevenueMember" xlink:label="csan_ConstructionRevenueMember" xlink:title="csan_ConstructionRevenueMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_ConstructionRevenueMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_ConstructionRevenueMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GasDistributionMember" xlink:label="ifrs-full_GasDistributionMember" xlink:title="ifrs-full_GasDistributionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="ifrs-full_GasDistributionMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to ifrs-full_GasDistributionMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LubricantsAndBasicOilMember" xlink:label="csan_LubricantsAndBasicOilMember" xlink:title="csan_LubricantsAndBasicOilMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_LubricantsAndBasicOilMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_LubricantsAndBasicOilMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherProductsMember" xlink:label="csan_OtherProductsMember" xlink:title="csan_OtherProductsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_OtherProductsMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_OtherProductsMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherServicesMember" xlink:label="csan_OtherServicesMember" xlink:title="csan_OtherServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_OtherServicesMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_OtherServicesMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PortElevationMember" xlink:label="csan_PortElevationMember" xlink:title="csan_PortElevationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_PortElevationMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_PortElevationMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TransportationMember" xlink:label="csan_TransportationMember" xlink:title="csan_TransportationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_TransportationMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_TransportationMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ElectricityDistributionMember" xlink:label="ifrs-full_ElectricityDistributionMember" xlink:title="ifrs-full_ElectricityDistributionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="ifrs-full_ElectricityDistributionMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to ifrs-full_ElectricityDistributionMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesMember" xlink:label="ifrs-full_ProductsAndServicesMember_1" xlink:title="ifrs-full_ProductsAndServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ProductsAndServicesAxis" xlink:to="ifrs-full_ProductsAndServicesMember_1" xlink:title="Definition : ifrs-full_ProductsAndServicesAxis to ifrs-full_ProductsAndServicesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentConsolidationItemsAxis" xlink:label="ifrs-full_SegmentConsolidationItemsAxis" xlink:title="ifrs-full_SegmentConsolidationItemsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable" xlink:to="ifrs-full_SegmentConsolidationItemsAxis" xlink:title="Definition : ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable to ifrs-full_SegmentConsolidationItemsAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:label="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:title="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SegmentConsolidationItemsAxis" xlink:to="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:title="Definition : ifrs-full_SegmentConsolidationItemsAxis to ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EliminationMember" xlink:label="csan_EliminationMember" xlink:title="csan_EliminationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:to="csan_EliminationMember" xlink:title="Definition : ifrs-full_EntitysTotalForSegmentConsolidationItemsMember to csan_EliminationMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:label="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_1" xlink:title="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SegmentConsolidationItemsAxis" xlink:to="ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_1" xlink:title="Definition : ifrs-full_SegmentConsolidationItemsAxis to ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsAxis" xlink:label="ifrs-full_SegmentsAxis" xlink:title="ifrs-full_SegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable" xlink:to="ifrs-full_SegmentsAxis" xlink:title="Definition : ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable to ifrs-full_SegmentsAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember" xlink:title="ifrs-full_SegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember" xlink:title="Definition : ifrs-full_SegmentsAxis to ifrs-full_SegmentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember_1" xlink:title="ifrs-full_SegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember_1" xlink:title="Definition : ifrs-full_SegmentsAxis to ifrs-full_SegmentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TimingOfTransferOfGoodsOrServicesAxis" xlink:label="ifrs-full_TimingOfTransferOfGoodsOrServicesAxis" xlink:title="ifrs-full_TimingOfTransferOfGoodsOrServicesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable" xlink:to="ifrs-full_TimingOfTransferOfGoodsOrServicesAxis" xlink:title="Definition : ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable to ifrs-full_TimingOfTransferOfGoodsOrServicesAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TimingOfTransferOfGoodsOrServicesMember" xlink:label="ifrs-full_TimingOfTransferOfGoodsOrServicesMember" xlink:title="ifrs-full_TimingOfTransferOfGoodsOrServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TimingOfTransferOfGoodsOrServicesAxis" xlink:to="ifrs-full_TimingOfTransferOfGoodsOrServicesMember" xlink:title="Definition : ifrs-full_TimingOfTransferOfGoodsOrServicesAxis to ifrs-full_TimingOfTransferOfGoodsOrServicesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GoodsOrServicesTransferredAtPointInTimeMember" xlink:label="ifrs-full_GoodsOrServicesTransferredAtPointInTimeMember" xlink:title="ifrs-full_GoodsOrServicesTransferredAtPointInTimeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TimingOfTransferOfGoodsOrServicesMember" xlink:to="ifrs-full_GoodsOrServicesTransferredAtPointInTimeMember" xlink:title="Definition : ifrs-full_TimingOfTransferOfGoodsOrServicesMember to ifrs-full_GoodsOrServicesTransferredAtPointInTimeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GoodsOrServicesTransferredOverTimeMember" xlink:label="ifrs-full_GoodsOrServicesTransferredOverTimeMember" xlink:title="ifrs-full_GoodsOrServicesTransferredOverTimeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TimingOfTransferOfGoodsOrServicesMember" xlink:to="ifrs-full_GoodsOrServicesTransferredOverTimeMember" xlink:title="Definition : ifrs-full_TimingOfTransferOfGoodsOrServicesMember to ifrs-full_GoodsOrServicesTransferredOverTimeMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TimingOfTransferOfGoodsOrServicesMember" xlink:label="ifrs-full_TimingOfTransferOfGoodsOrServicesMember_1" xlink:title="ifrs-full_TimingOfTransferOfGoodsOrServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TimingOfTransferOfGoodsOrServicesAxis" xlink:to="ifrs-full_TimingOfTransferOfGoodsOrServicesMember_1" xlink:title="Definition : ifrs-full_TimingOfTransferOfGoodsOrServicesAxis to ifrs-full_TimingOfTransferOfGoodsOrServicesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RevenueFromContractsWithCustomers" xlink:label="ifrs-full_RevenueFromContractsWithCustomers" xlink:title="ifrs-full_RevenueFromContractsWithCustomers"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems" xlink:to="ifrs-full_RevenueFromContractsWithCustomers" xlink:title="Definition : ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems to ifrs-full_RevenueFromContractsWithCustomers" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/OtherincomeexpensesnetSummaryofDetailsofOtherincomeexpensesnetParentheticalDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherOperatingIncomeAndExpenseNetLineItems" xlink:label="csan_OtherOperatingIncomeAndExpenseNetLineItems" xlink:title="csan_OtherOperatingIncomeAndExpenseNetLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GainsOnLitigationSettlements" xlink:label="ifrs-full_GainsOnLitigationSettlements" xlink:title="ifrs-full_GainsOnLitigationSettlements"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_OtherOperatingIncomeAndExpenseNetLineItems" xlink:to="ifrs-full_GainsOnLitigationSettlements" xlink:title="Definition : csan_OtherOperatingIncomeAndExpenseNetLineItems to ifrs-full_GainsOnLitigationSettlements" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherOperatingIncomeAndExpenseNetTable" xlink:label="csan_OtherOperatingIncomeAndExpenseNetTable" xlink:title="csan_OtherOperatingIncomeAndExpenseNetTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_OtherOperatingIncomeAndExpenseNetLineItems" xlink:to="csan_OtherOperatingIncomeAndExpenseNetTable" xlink:title="Definition : csan_OtherOperatingIncomeAndExpenseNetLineItems to csan_OtherOperatingIncomeAndExpenseNetTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfProvisionsAxis" xlink:label="ifrs-full_ClassesOfProvisionsAxis" xlink:title="ifrs-full_ClassesOfProvisionsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_OtherOperatingIncomeAndExpenseNetTable" xlink:to="ifrs-full_ClassesOfProvisionsAxis" xlink:title="Definition : csan_OtherOperatingIncomeAndExpenseNetTable to ifrs-full_ClassesOfProvisionsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember" xlink:title="ifrs-full_OtherProvisionsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember" xlink:title="Definition : ifrs-full_ClassesOfProvisionsAxis to ifrs-full_OtherProvisionsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IndemnificationsMember" xlink:label="csan_IndemnificationsMember" xlink:title="csan_IndemnificationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_OtherProvisionsMember" xlink:to="csan_IndemnificationsMember" xlink:title="Definition : ifrs-full_OtherProvisionsMember to csan_IndemnificationsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherProvisionsMember" xlink:label="ifrs-full_OtherProvisionsMember_1" xlink:title="ifrs-full_OtherProvisionsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_OtherProvisionsMember_1" xlink:title="Definition : ifrs-full_ClassesOfProvisionsAxis to ifrs-full_OtherProvisionsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RecognizedGainLossOnAssignmentOfCreditRights" xlink:label="csan_RecognizedGainLossOnAssignmentOfCreditRights" xlink:title="csan_RecognizedGainLossOnAssignmentOfCreditRights"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_OtherOperatingIncomeAndExpenseNetLineItems" xlink:to="csan_RecognizedGainLossOnAssignmentOfCreditRights" xlink:title="Definition : csan_OtherOperatingIncomeAndExpenseNetLineItems to csan_RecognizedGainLossOnAssignmentOfCreditRights" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AdditionalPaymentPercentageOfCreditRights" xlink:label="csan_AdditionalPaymentPercentageOfCreditRights" xlink:title="csan_AdditionalPaymentPercentageOfCreditRights"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_OtherOperatingIncomeAndExpenseNetLineItems" xlink:to="csan_AdditionalPaymentPercentageOfCreditRights" xlink:title="Definition : csan_OtherOperatingIncomeAndExpenseNetLineItems to csan_AdditionalPaymentPercentageOfCreditRights" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LossesOnLitigationSettlements" xlink:label="ifrs-full_LossesOnLitigationSettlements" xlink:title="ifrs-full_LossesOnLitigationSettlements"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_OtherOperatingIncomeAndExpenseNetLineItems" xlink:to="ifrs-full_LossesOnLitigationSettlements" xlink:title="Definition : csan_OtherOperatingIncomeAndExpenseNetLineItems to ifrs-full_LossesOnLitigationSettlements" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialassetsandliabilitiesSummaryofFinancialRisksandFinancialPerformanceDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:label="ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:title="ifrs-full_DisclosureOfFinancialAssetsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfReasonForChangeInMethodsAndAssumptionsUsedInPreparingSensitivityAnalysis" xlink:label="ifrs-full_DescriptionOfReasonForChangeInMethodsAndAssumptionsUsedInPreparingSensitivityAnalysis" xlink:title="ifrs-full_DescriptionOfReasonForChangeInMethodsAndAssumptionsUsedInPreparingSensitivityAnalysis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:to="ifrs-full_DescriptionOfReasonForChangeInMethodsAndAssumptionsUsedInPreparingSensitivityAnalysis" xlink:title="Definition : ifrs-full_DisclosureOfFinancialAssetsLineItems to ifrs-full_DescriptionOfReasonForChangeInMethodsAndAssumptionsUsedInPreparingSensitivityAnalysis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsTable" xlink:label="ifrs-full_DisclosureOfFinancialAssetsTable" xlink:title="ifrs-full_DisclosureOfFinancialAssetsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:to="ifrs-full_DisclosureOfFinancialAssetsTable" xlink:title="Definition : ifrs-full_DisclosureOfFinancialAssetsLineItems to ifrs-full_DisclosureOfFinancialAssetsTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ConcentrationsOfRiskAxis" xlink:label="ifrs-full_ConcentrationsOfRiskAxis" xlink:title="ifrs-full_ConcentrationsOfRiskAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfFinancialAssetsTable" xlink:to="ifrs-full_ConcentrationsOfRiskAxis" xlink:title="Definition : ifrs-full_DisclosureOfFinancialAssetsTable to ifrs-full_ConcentrationsOfRiskAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ConcentrationsOfRiskMember" xlink:label="ifrs-full_ConcentrationsOfRiskMember" xlink:title="ifrs-full_ConcentrationsOfRiskMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ConcentrationsOfRiskAxis" xlink:to="ifrs-full_ConcentrationsOfRiskMember" xlink:title="Definition : ifrs-full_ConcentrationsOfRiskAxis to ifrs-full_ConcentrationsOfRiskMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CashFlowForecastingMember" xlink:label="csan_CashFlowForecastingMember" xlink:title="csan_CashFlowForecastingMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ConcentrationsOfRiskMember" xlink:to="csan_CashFlowForecastingMember" xlink:title="Definition : ifrs-full_ConcentrationsOfRiskMember to csan_CashFlowForecastingMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SensitivityAnalysisMember" xlink:label="csan_SensitivityAnalysisMember" xlink:title="csan_SensitivityAnalysisMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ConcentrationsOfRiskMember" xlink:to="csan_SensitivityAnalysisMember" xlink:title="Definition : ifrs-full_ConcentrationsOfRiskMember to csan_SensitivityAnalysisMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AgingAnalysisMember" xlink:label="csan_AgingAnalysisMember" xlink:title="csan_AgingAnalysisMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ConcentrationsOfRiskMember" xlink:to="csan_AgingAnalysisMember" xlink:title="Definition : ifrs-full_ConcentrationsOfRiskMember to csan_AgingAnalysisMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CreditRatingMember" xlink:label="csan_CreditRatingMember" xlink:title="csan_CreditRatingMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ConcentrationsOfRiskMember" xlink:to="csan_CreditRatingMember" xlink:title="Definition : ifrs-full_ConcentrationsOfRiskMember to csan_CreditRatingMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ConcentrationsOfRiskMember" xlink:label="ifrs-full_ConcentrationsOfRiskMember_1" xlink:title="ifrs-full_ConcentrationsOfRiskMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ConcentrationsOfRiskAxis" xlink:to="ifrs-full_ConcentrationsOfRiskMember_1" xlink:title="Definition : ifrs-full_ConcentrationsOfRiskAxis to ifrs-full_ConcentrationsOfRiskMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksAxis" xlink:label="ifrs-full_TypesOfRisksAxis" xlink:title="ifrs-full_TypesOfRisksAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfFinancialAssetsTable" xlink:to="ifrs-full_TypesOfRisksAxis" xlink:title="Definition : ifrs-full_DisclosureOfFinancialAssetsTable to ifrs-full_TypesOfRisksAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksMember" xlink:label="ifrs-full_TypesOfRisksMember" xlink:title="ifrs-full_TypesOfRisksMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksMember" xlink:title="Definition : ifrs-full_TypesOfRisksAxis to ifrs-full_TypesOfRisksMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CreditRiskMember" xlink:label="ifrs-full_CreditRiskMember" xlink:title="ifrs-full_CreditRiskMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ifrs-full_CreditRiskMember" xlink:title="Definition : ifrs-full_TypesOfRisksMember to ifrs-full_CreditRiskMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrencyRiskMember" xlink:label="ifrs-full_CurrencyRiskMember" xlink:title="ifrs-full_CurrencyRiskMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ifrs-full_CurrencyRiskMember" xlink:title="Definition : ifrs-full_TypesOfRisksMember to ifrs-full_CurrencyRiskMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateRiskMember" xlink:label="ifrs-full_InterestRateRiskMember" xlink:title="ifrs-full_InterestRateRiskMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ifrs-full_InterestRateRiskMember" xlink:title="Definition : ifrs-full_TypesOfRisksMember to ifrs-full_InterestRateRiskMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiquidityRiskMember" xlink:label="ifrs-full_LiquidityRiskMember" xlink:title="ifrs-full_LiquidityRiskMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ifrs-full_LiquidityRiskMember" xlink:title="Definition : ifrs-full_TypesOfRisksMember to ifrs-full_LiquidityRiskMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherPriceRiskMember" xlink:label="ifrs-full_OtherPriceRiskMember" xlink:title="ifrs-full_OtherPriceRiskMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ifrs-full_OtherPriceRiskMember" xlink:title="Definition : ifrs-full_TypesOfRisksMember to ifrs-full_OtherPriceRiskMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksMember" xlink:label="ifrs-full_TypesOfRisksMember_1" xlink:title="ifrs-full_TypesOfRisksMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksMember_1" xlink:title="Definition : ifrs-full_TypesOfRisksAxis to ifrs-full_TypesOfRisksMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MethodsAndAssumptionsUsedInPreparingSensitivityAnalysis" xlink:label="ifrs-full_MethodsAndAssumptionsUsedInPreparingSensitivityAnalysis" xlink:title="ifrs-full_MethodsAndAssumptionsUsedInPreparingSensitivityAnalysis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:to="ifrs-full_MethodsAndAssumptionsUsedInPreparingSensitivityAnalysis" xlink:title="Definition : ifrs-full_DisclosureOfFinancialAssetsLineItems to ifrs-full_MethodsAndAssumptionsUsedInPreparingSensitivityAnalysis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MethodsUsedInPreparingSensitivityAnalysisReflectingInterdependenciesBetweenRiskVariables" xlink:label="ifrs-full_MethodsUsedInPreparingSensitivityAnalysisReflectingInterdependenciesBetweenRiskVariables" xlink:title="ifrs-full_MethodsUsedInPreparingSensitivityAnalysisReflectingInterdependenciesBetweenRiskVariables"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:to="ifrs-full_MethodsUsedInPreparingSensitivityAnalysisReflectingInterdependenciesBetweenRiskVariables" xlink:title="Definition : ifrs-full_DisclosureOfFinancialAssetsLineItems to ifrs-full_MethodsUsedInPreparingSensitivityAnalysisReflectingInterdependenciesBetweenRiskVariables" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialassetsandliabilitiesSummaryofNetExposuretoExchangeRateVariationsonAssetsandLiabilitiesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfForeignExchangeRiskLineItems" xlink:label="csan_DisclosureOfForeignExchangeRiskLineItems" xlink:title="csan_DisclosureOfForeignExchangeRiskLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CreditExposure" xlink:label="ifrs-full_CreditExposure" xlink:title="ifrs-full_CreditExposure"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfForeignExchangeRiskLineItems" xlink:to="ifrs-full_CreditExposure" xlink:title="Definition : csan_DisclosureOfForeignExchangeRiskLineItems to ifrs-full_CreditExposure" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfForeignExchangeRiskTable" xlink:label="csan_DisclosureOfForeignExchangeRiskTable" xlink:title="csan_DisclosureOfForeignExchangeRiskTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfForeignExchangeRiskLineItems" xlink:to="csan_DisclosureOfForeignExchangeRiskTable" xlink:title="Definition : csan_DisclosureOfForeignExchangeRiskLineItems to csan_DisclosureOfForeignExchangeRiskTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfForeignExchangeRiskTable" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:title="Definition : csan_DisclosureOfForeignExchangeRiskTable to ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsAxis to ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CashAndCashEquivalentMember" xlink:label="csan_CashAndCashEquivalentMember" xlink:title="csan_CashAndCashEquivalentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_CashAndCashEquivalentMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_CashAndCashEquivalentMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DerivativeFinancialInstrumentsMember" xlink:label="csan_DerivativeFinancialInstrumentsMember" xlink:title="csan_DerivativeFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_DerivativeFinancialInstrumentsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_DerivativeFinancialInstrumentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LoansBorrowingsAndDebenturesMember" xlink:label="csan_LoansBorrowingsAndDebenturesMember" xlink:title="csan_LoansBorrowingsAndDebenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_LoansBorrowingsAndDebenturesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_LoansBorrowingsAndDebenturesMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TradePayablesMember" xlink:label="csan_TradePayablesMember" xlink:title="csan_TradePayablesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_TradePayablesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_TradePayablesMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TradeReceivablesMember" xlink:label="ifrs-full_TradeReceivablesMember" xlink:title="ifrs-full_TradeReceivablesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="ifrs-full_TradeReceivablesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to ifrs-full_TradeReceivablesMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LeasesMember" xlink:label="csan_LeasesMember" xlink:title="csan_LeasesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_LeasesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_LeasesMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContingentConsiderationMember" xlink:label="ifrs-full_ContingentConsiderationMember" xlink:title="ifrs-full_ContingentConsiderationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="ifrs-full_ContingentConsiderationMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to ifrs-full_ContingentConsiderationMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember_1" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember_1" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsAxis to ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksAxis" xlink:label="ifrs-full_TypesOfRisksAxis" xlink:title="ifrs-full_TypesOfRisksAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfForeignExchangeRiskTable" xlink:to="ifrs-full_TypesOfRisksAxis" xlink:title="Definition : csan_DisclosureOfForeignExchangeRiskTable to ifrs-full_TypesOfRisksAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksMember" xlink:label="ifrs-full_TypesOfRisksMember" xlink:title="ifrs-full_TypesOfRisksMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksMember" xlink:title="Definition : ifrs-full_TypesOfRisksAxis to ifrs-full_TypesOfRisksMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ForeignExchangeRiskMember" xlink:label="csan_ForeignExchangeRiskMember" xlink:title="csan_ForeignExchangeRiskMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="csan_ForeignExchangeRiskMember" xlink:title="Definition : ifrs-full_TypesOfRisksMember to csan_ForeignExchangeRiskMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksMember" xlink:label="ifrs-full_TypesOfRisksMember_1" xlink:title="ifrs-full_TypesOfRisksMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksMember_1" xlink:title="Definition : ifrs-full_TypesOfRisksAxis to ifrs-full_TypesOfRisksMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
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| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialassetsandliabilitiesAdditionalInformationDetails"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfSensitivityAnalysisOfFinancialInstrumentsChangesInForeignExchangeRatesLineItems" xlink:label="csan_DisclosureOfSensitivityAnalysisOfFinancialInstrumentsChangesInForeignExchangeRatesLineItems" xlink:title="csan_DisclosureOfSensitivityAnalysisOfFinancialInstrumentsChangesInForeignExchangeRatesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfSensitivityAnalysisOfFinancialInstrumentsChangesInForeignExchangeRatesTable" xlink:label="csan_DisclosureOfSensitivityAnalysisOfFinancialInstrumentsChangesInForeignExchangeRatesTable" xlink:title="csan_DisclosureOfSensitivityAnalysisOfFinancialInstrumentsChangesInForeignExchangeRatesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfSensitivityAnalysisOfFinancialInstrumentsChangesInForeignExchangeRatesLineItems" xlink:to="csan_DisclosureOfSensitivityAnalysisOfFinancialInstrumentsChangesInForeignExchangeRatesTable" xlink:title="Definition : csan_DisclosureOfSensitivityAnalysisOfFinancialInstrumentsChangesInForeignExchangeRatesLineItems to csan_DisclosureOfSensitivityAnalysisOfFinancialInstrumentsChangesInForeignExchangeRatesTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionsAxis" xlink:label="ifrs-full_ActuarialAssumptionsAxis" xlink:title="ifrs-full_ActuarialAssumptionsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfSensitivityAnalysisOfFinancialInstrumentsChangesInForeignExchangeRatesTable" xlink:to="ifrs-full_ActuarialAssumptionsAxis" xlink:title="Definition : csan_DisclosureOfSensitivityAnalysisOfFinancialInstrumentsChangesInForeignExchangeRatesTable to ifrs-full_ActuarialAssumptionsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
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| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/currency/2019/currency-2019-01-31.xsd#currency_AllCurrenciesDomain" xlink:label="currency_AllCurrenciesDomain" xlink:title="currency_AllCurrenciesDomain"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IncreaseDecreaseInForeignExchangeDueToReasonablyPossibleIncreaseInActuarialAssumption" xlink:label="csan_IncreaseDecreaseInForeignExchangeDueToReasonablyPossibleIncreaseInActuarialAssumption" xlink:title="csan_IncreaseDecreaseInForeignExchangeDueToReasonablyPossibleIncreaseInActuarialAssumption"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfSensitivityAnalysisOnIncomeForThePeriodAssumingIncreaseAndDecreaseInInterestRatesLineItems" xlink:label="csan_DisclosureOfSensitivityAnalysisOnIncomeForThePeriodAssumingIncreaseAndDecreaseInInterestRatesLineItems" xlink:title="csan_DisclosureOfSensitivityAnalysisOnIncomeForThePeriodAssumingIncreaseAndDecreaseInInterestRatesLineItems"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionsAxis" xlink:label="ifrs-full_ActuarialAssumptionsAxis" xlink:title="ifrs-full_ActuarialAssumptionsAxis"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionsMember" xlink:label="ifrs-full_ActuarialAssumptionsMember" xlink:title="ifrs-full_ActuarialAssumptionsMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ActuarialAssumptionsPercentageOneDecreaseMember" xlink:label="csan_ActuarialAssumptionsPercentageOneDecreaseMember" xlink:title="csan_ActuarialAssumptionsPercentageOneDecreaseMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ActuarialAssumptionsPercentageTwoIncreaseMember" xlink:label="csan_ActuarialAssumptionsPercentageTwoIncreaseMember" xlink:title="csan_ActuarialAssumptionsPercentageTwoIncreaseMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ActuarialAssumptionsMember" xlink:to="csan_ActuarialAssumptionsPercentageTwoIncreaseMember" xlink:title="Definition : ifrs-full_ActuarialAssumptionsMember to csan_ActuarialAssumptionsPercentageTwoIncreaseMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionsMember" xlink:label="ifrs-full_ActuarialAssumptionsMember_1" xlink:title="ifrs-full_ActuarialAssumptionsMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsAxis"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CashAndCashEquivalentMember" xlink:label="csan_CashAndCashEquivalentMember" xlink:title="csan_CashAndCashEquivalentMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MarketableSecuritiesMember" xlink:label="csan_MarketableSecuritiesMember" xlink:title="csan_MarketableSecuritiesMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ConsiderationAssetMember" xlink:label="csan_ConsiderationAssetMember" xlink:title="csan_ConsiderationAssetMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RestrictedCashMember" xlink:label="csan_RestrictedCashMember" xlink:title="csan_RestrictedCashMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LeasesMember" xlink:label="csan_LeasesMember" xlink:title="csan_LeasesMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RailroadConcessionPayableMember" xlink:label="csan_RailroadConcessionPayableMember" xlink:title="csan_RailroadConcessionPayableMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LoansBorrowingsAndDebenturesMember" xlink:label="csan_LoansBorrowingsAndDebenturesMember" xlink:title="csan_LoansBorrowingsAndDebenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_LoansBorrowingsAndDebenturesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_LoansBorrowingsAndDebenturesMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherFinancialLiabilitiesMember" xlink:label="csan_OtherFinancialLiabilitiesMember" xlink:title="csan_OtherFinancialLiabilitiesMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember_1" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EstimatedPretaxProfitSensitivityAnalysis" xlink:label="csan_EstimatedPretaxProfitSensitivityAnalysis" xlink:title="csan_EstimatedPretaxProfitSensitivityAnalysis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfSensitivityAnalysisOnIncomeForThePeriodAssumingIncreaseAndDecreaseInInterestRatesLineItems" xlink:to="csan_EstimatedPretaxProfitSensitivityAnalysis" xlink:title="Definition : csan_DisclosureOfSensitivityAnalysisOnIncomeForThePeriodAssumingIncreaseAndDecreaseInInterestRatesLineItems to csan_EstimatedPretaxProfitSensitivityAnalysis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
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| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialassetsandliabilitiesSummaryofProbableScenarioConsidersEstimatedInterestRateDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureInterestRatesSensitivityAnalysisLineItems" xlink:label="csan_DisclosureInterestRatesSensitivityAnalysisLineItems" xlink:title="csan_DisclosureInterestRatesSensitivityAnalysisLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureInterestRatesSensitivityAnalysisTable" xlink:label="csan_DisclosureInterestRatesSensitivityAnalysisTable" xlink:title="csan_DisclosureInterestRatesSensitivityAnalysisTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureInterestRatesSensitivityAnalysisLineItems" xlink:to="csan_DisclosureInterestRatesSensitivityAnalysisTable" xlink:title="Definition : csan_DisclosureInterestRatesSensitivityAnalysisLineItems to csan_DisclosureInterestRatesSensitivityAnalysisTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionsAxis" xlink:label="ifrs-full_ActuarialAssumptionsAxis" xlink:title="ifrs-full_ActuarialAssumptionsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureInterestRatesSensitivityAnalysisTable" xlink:to="ifrs-full_ActuarialAssumptionsAxis" xlink:title="Definition : csan_DisclosureInterestRatesSensitivityAnalysisTable to ifrs-full_ActuarialAssumptionsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionsMember" xlink:label="ifrs-full_ActuarialAssumptionsMember" xlink:title="ifrs-full_ActuarialAssumptionsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ActuarialAssumptionsAxis" xlink:to="ifrs-full_ActuarialAssumptionsMember" xlink:title="Definition : ifrs-full_ActuarialAssumptionsAxis to ifrs-full_ActuarialAssumptionsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ActuarialAssumptionOfSensitivityAnalysisOnForeignExchangeProbableMember" xlink:label="csan_ActuarialAssumptionOfSensitivityAnalysisOnForeignExchangeProbableMember" xlink:title="csan_ActuarialAssumptionOfSensitivityAnalysisOnForeignExchangeProbableMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ActuarialAssumptionsMember" xlink:to="csan_ActuarialAssumptionOfSensitivityAnalysisOnForeignExchangeProbableMember" xlink:title="Definition : ifrs-full_ActuarialAssumptionsMember to csan_ActuarialAssumptionOfSensitivityAnalysisOnForeignExchangeProbableMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ActuarialAssumptionsPercentageOneDecreaseMember" xlink:label="csan_ActuarialAssumptionsPercentageOneDecreaseMember" xlink:title="csan_ActuarialAssumptionsPercentageOneDecreaseMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ActuarialAssumptionsMember" xlink:to="csan_ActuarialAssumptionsPercentageOneDecreaseMember" xlink:title="Definition : ifrs-full_ActuarialAssumptionsMember to csan_ActuarialAssumptionsPercentageOneDecreaseMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ActuarialAssumptionsPercentageOneIncreaseMember" xlink:label="csan_ActuarialAssumptionsPercentageOneIncreaseMember" xlink:title="csan_ActuarialAssumptionsPercentageOneIncreaseMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ActuarialAssumptionsMember" xlink:to="csan_ActuarialAssumptionsPercentageOneIncreaseMember" xlink:title="Definition : ifrs-full_ActuarialAssumptionsMember to csan_ActuarialAssumptionsPercentageOneIncreaseMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ActuarialAssumptionsPercentageTwoDecreaseMember" xlink:label="csan_ActuarialAssumptionsPercentageTwoDecreaseMember" xlink:title="csan_ActuarialAssumptionsPercentageTwoDecreaseMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ActuarialAssumptionsMember" xlink:to="csan_ActuarialAssumptionsPercentageTwoDecreaseMember" xlink:title="Definition : ifrs-full_ActuarialAssumptionsMember to csan_ActuarialAssumptionsPercentageTwoDecreaseMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ActuarialAssumptionsPercentageTwoIncreaseMember" xlink:label="csan_ActuarialAssumptionsPercentageTwoIncreaseMember" xlink:title="csan_ActuarialAssumptionsPercentageTwoIncreaseMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ActuarialAssumptionsMember" xlink:to="csan_ActuarialAssumptionsPercentageTwoIncreaseMember" xlink:title="Definition : ifrs-full_ActuarialAssumptionsMember to csan_ActuarialAssumptionsPercentageTwoIncreaseMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionsMember" xlink:label="ifrs-full_ActuarialAssumptionsMember_1" xlink:title="ifrs-full_ActuarialAssumptionsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ActuarialAssumptionsAxis" xlink:to="ifrs-full_ActuarialAssumptionsMember_1" xlink:title="Definition : ifrs-full_ActuarialAssumptionsAxis to ifrs-full_ActuarialAssumptionsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfInterestRatesAxis" xlink:label="ifrs-full_TypesOfInterestRatesAxis" xlink:title="ifrs-full_TypesOfInterestRatesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureInterestRatesSensitivityAnalysisTable" xlink:to="ifrs-full_TypesOfInterestRatesAxis" xlink:title="Definition : csan_DisclosureInterestRatesSensitivityAnalysisTable to ifrs-full_TypesOfInterestRatesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateTypesMember" xlink:label="ifrs-full_InterestRateTypesMember" xlink:title="ifrs-full_InterestRateTypesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfInterestRatesAxis" xlink:to="ifrs-full_InterestRateTypesMember" xlink:title="Definition : ifrs-full_TypesOfInterestRatesAxis to ifrs-full_InterestRateTypesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CDIMember" xlink:label="csan_CDIMember" xlink:title="csan_CDIMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_CDIMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_CDIMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FEDFUNDSMember" xlink:label="csan_FEDFUNDSMember" xlink:title="csan_FEDFUNDSMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_FEDFUNDSMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_FEDFUNDSMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IGPMMember" xlink:label="csan_IGPMMember" xlink:title="csan_IGPMMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IGPMMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IGPMMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IPCAMember" xlink:label="csan_IPCAMember" xlink:title="csan_IPCAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_IPCAMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_IPCAMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LIBORMember" xlink:label="csan_LIBORMember" xlink:title="csan_LIBORMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_LIBORMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_LIBORMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SelicMember" xlink:label="csan_SelicMember" xlink:title="csan_SelicMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_SelicMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_SelicMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TJLPFourSixTwoTJLPPlusOnePercentageMember" xlink:label="csan_TJLPFourSixTwoTJLPPlusOnePercentageMember" xlink:title="csan_TJLPFourSixTwoTJLPPlusOnePercentageMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_TJLPFourSixTwoTJLPPlusOnePercentageMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_TJLPFourSixTwoTJLPPlusOnePercentageMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TJLPMember" xlink:label="csan_TJLPMember" xlink:title="csan_TJLPMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_TJLPMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_TJLPMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateTypesMember" xlink:label="ifrs-full_InterestRateTypesMember_1" xlink:title="ifrs-full_InterestRateTypesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfInterestRatesAxis" xlink:to="ifrs-full_InterestRateTypesMember_1" xlink:title="Definition : ifrs-full_TypesOfInterestRatesAxis to ifrs-full_InterestRateTypesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EstimatedInterestRate" xlink:label="csan_EstimatedInterestRate" xlink:title="csan_EstimatedInterestRate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureInterestRatesSensitivityAnalysisLineItems" xlink:to="csan_EstimatedInterestRate" xlink:title="Definition : csan_DisclosureInterestRatesSensitivityAnalysisLineItems to csan_EstimatedInterestRate" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialassetsandliabilitiesSummaryofCreditRiskRatingDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfExternalCreditExposuresLineItems" xlink:label="ifrs-full_DisclosureOfExternalCreditExposuresLineItems" xlink:title="ifrs-full_DisclosureOfExternalCreditExposuresLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfExternalCreditExposuresTable" xlink:label="ifrs-full_DisclosureOfExternalCreditExposuresTable" xlink:title="ifrs-full_DisclosureOfExternalCreditExposuresTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfExternalCreditExposuresLineItems" xlink:to="ifrs-full_DisclosureOfExternalCreditExposuresTable" xlink:title="Definition : ifrs-full_DisclosureOfExternalCreditExposuresLineItems to ifrs-full_DisclosureOfExternalCreditExposuresTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CreditRatingSourceAxis" xlink:label="csan_CreditRatingSourceAxis" xlink:title="csan_CreditRatingSourceAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfExternalCreditExposuresTable" xlink:to="csan_CreditRatingSourceAxis" xlink:title="Definition : ifrs-full_DisclosureOfExternalCreditExposuresTable to csan_CreditRatingSourceAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CreditRatingSourceDomain" xlink:label="csan_CreditRatingSourceDomain" xlink:title="csan_CreditRatingSourceDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_CreditRatingSourceAxis" xlink:to="csan_CreditRatingSourceDomain" xlink:title="Definition : csan_CreditRatingSourceAxis to csan_CreditRatingSourceDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AAACreditRatingMember" xlink:label="csan_AAACreditRatingMember" xlink:title="csan_AAACreditRatingMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_CreditRatingSourceDomain" xlink:to="csan_AAACreditRatingMember" xlink:title="Definition : csan_CreditRatingSourceDomain to csan_AAACreditRatingMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AACreditRatingMember" xlink:label="csan_AACreditRatingMember" xlink:title="csan_AACreditRatingMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_CreditRatingSourceDomain" xlink:to="csan_AACreditRatingMember" xlink:title="Definition : csan_CreditRatingSourceDomain to csan_AACreditRatingMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_APlusCreditRatingMember" xlink:label="csan_APlusCreditRatingMember" xlink:title="csan_APlusCreditRatingMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_CreditRatingSourceDomain" xlink:to="csan_APlusCreditRatingMember" xlink:title="Definition : csan_CreditRatingSourceDomain to csan_APlusCreditRatingMember" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CreditRatingSourceDomain" xlink:label="csan_CreditRatingSourceDomain_1" xlink:title="csan_CreditRatingSourceDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_CreditRatingSourceAxis" xlink:to="csan_CreditRatingSourceDomain_1" xlink:title="Definition : csan_CreditRatingSourceAxis to csan_CreditRatingSourceDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MaximumExposureToCreditRisk" xlink:label="ifrs-full_MaximumExposureToCreditRisk" xlink:title="ifrs-full_MaximumExposureToCreditRisk"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfExternalCreditExposuresLineItems" xlink:to="ifrs-full_MaximumExposureToCreditRisk" xlink:title="Definition : ifrs-full_DisclosureOfExternalCreditExposuresLineItems to ifrs-full_MaximumExposureToCreditRisk" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialassetsandliabilitiesSummaryofFinancialLiabilitiesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems" xlink:label="ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems" xlink:title="ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NonDerivativeFinancialLiabilities" xlink:label="csan_NonDerivativeFinancialLiabilities" xlink:title="csan_NonDerivativeFinancialLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems" xlink:to="csan_NonDerivativeFinancialLiabilities" xlink:title="Definition : ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems to csan_NonDerivativeFinancialLiabilities" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable" xlink:label="ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable" xlink:title="ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems" xlink:to="ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable" xlink:title="Definition : ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems to ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksAxis" xlink:label="ifrs-full_TypesOfRisksAxis" xlink:title="ifrs-full_TypesOfRisksAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable" xlink:to="ifrs-full_TypesOfRisksAxis" xlink:title="Definition : ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable to ifrs-full_TypesOfRisksAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksMember" xlink:label="ifrs-full_TypesOfRisksMember" xlink:title="ifrs-full_TypesOfRisksMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksMember" xlink:title="Definition : ifrs-full_TypesOfRisksAxis to ifrs-full_TypesOfRisksMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiquidityRiskMember" xlink:label="ifrs-full_LiquidityRiskMember" xlink:title="ifrs-full_LiquidityRiskMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_TypesOfRisksMember" xlink:to="ifrs-full_LiquidityRiskMember" xlink:title="Definition : ifrs-full_TypesOfRisksMember to ifrs-full_LiquidityRiskMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfRisksMember" xlink:label="ifrs-full_TypesOfRisksMember_1" xlink:title="ifrs-full_TypesOfRisksMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksMember_1" xlink:title="Definition : ifrs-full_TypesOfRisksAxis to ifrs-full_TypesOfRisksMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:title="Definition : ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable to ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsAxis to ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LoansBorrowingsAndDebenturesMember" xlink:label="csan_LoansBorrowingsAndDebenturesMember" xlink:title="csan_LoansBorrowingsAndDebenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_LoansBorrowingsAndDebenturesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_LoansBorrowingsAndDebenturesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TradePayablesMember" xlink:label="csan_TradePayablesMember" xlink:title="csan_TradePayablesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_TradePayablesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_TradePayablesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherFinancialLiabilityMember" xlink:label="csan_OtherFinancialLiabilityMember" xlink:title="csan_OtherFinancialLiabilityMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_OtherFinancialLiabilityMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_OtherFinancialLiabilityMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TaxInstallmentsREFISMember" xlink:label="csan_TaxInstallmentsREFISMember" xlink:title="csan_TaxInstallmentsREFISMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_TaxInstallmentsREFISMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_TaxInstallmentsREFISMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LeasesMember" xlink:label="csan_LeasesMember" xlink:title="csan_LeasesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_LeasesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_LeasesMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RailroadConcessionPayableMember" xlink:label="csan_RailroadConcessionPayableMember" xlink:title="csan_RailroadConcessionPayableMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_RailroadConcessionPayableMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_RailroadConcessionPayableMember" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DerivativeFinancialInstrumentsMember" xlink:label="csan_DerivativeFinancialInstrumentsMember" xlink:title="csan_DerivativeFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_DerivativeFinancialInstrumentsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_DerivativeFinancialInstrumentsMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PayablesToRelatedPartiesMember" xlink:label="csan_PayablesToRelatedPartiesMember" xlink:title="csan_PayablesToRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_PayablesToRelatedPartiesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_PayablesToRelatedPartiesMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DividendsPayableMember" xlink:label="csan_DividendsPayableMember" xlink:title="csan_DividendsPayableMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_DividendsPayableMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_DividendsPayableMember" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PreferredShareholdersPayableInSubsidiariesMember" xlink:label="csan_PreferredShareholdersPayableInSubsidiariesMember" xlink:title="csan_PreferredShareholdersPayableInSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:to="csan_PreferredShareholdersPayableInSubsidiariesMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsMember to csan_PreferredShareholdersPayableInSubsidiariesMember" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsMember_1" xlink:title="ifrs-full_ClassesOfFinancialInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsMember_1" xlink:title="Definition : ifrs-full_ClassesOfFinancialInstrumentsAxis to ifrs-full_ClassesOfFinancialInstrumentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MaturityAxis" xlink:label="ifrs-full_MaturityAxis" xlink:title="ifrs-full_MaturityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable" xlink:to="ifrs-full_MaturityAxis" xlink:title="Definition : ifrs-full_DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable to ifrs-full_MaturityAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember" xlink:title="ifrs-full_AggregatedTimeBandsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember" xlink:title="Definition : ifrs-full_MaturityAxis to ifrs-full_AggregatedTimeBandsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NotLaterThanOneYearMember" xlink:label="ifrs-full_NotLaterThanOneYearMember" xlink:title="ifrs-full_NotLaterThanOneYearMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_NotLaterThanOneYearMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to ifrs-full_NotLaterThanOneYearMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember" xlink:label="ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember" xlink:title="ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanThreeYearsAndNotLaterThanFiveYearsMember" xlink:label="ifrs-full_LaterThanThreeYearsAndNotLaterThanFiveYearsMember" xlink:title="ifrs-full_LaterThanThreeYearsAndNotLaterThanFiveYearsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_LaterThanThreeYearsAndNotLaterThanFiveYearsMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to ifrs-full_LaterThanThreeYearsAndNotLaterThanFiveYearsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LaterThanFiveYearsMember" xlink:label="ifrs-full_LaterThanFiveYearsMember" xlink:title="ifrs-full_LaterThanFiveYearsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AggregatedTimeBandsMember" xlink:to="ifrs-full_LaterThanFiveYearsMember" xlink:title="Definition : ifrs-full_AggregatedTimeBandsMember to ifrs-full_LaterThanFiveYearsMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AggregatedTimeBandsMember" xlink:label="ifrs-full_AggregatedTimeBandsMember_1" xlink:title="ifrs-full_AggregatedTimeBandsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_AggregatedTimeBandsMember_1" xlink:title="Definition : ifrs-full_MaturityAxis to ifrs-full_AggregatedTimeBandsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/PostEmploymentBenefitsSummaryOfPostEmploymentBenefitsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:label="ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:title="ifrs-full_DisclosureOfDefinedBenefitPlansLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:label="ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:title="ifrs-full_DisclosureOfDefinedBenefitPlansTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:to="ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:title="Definition : ifrs-full_DisclosureOfDefinedBenefitPlansLineItems to ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis" xlink:label="ifrs-full_DefinedBenefitPlansAxis" xlink:title="ifrs-full_DefinedBenefitPlansAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:to="ifrs-full_DefinedBenefitPlansAxis" xlink:title="Definition : ifrs-full_DisclosureOfDefinedBenefitPlansTable to ifrs-full_DefinedBenefitPlansAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember" xlink:title="ifrs-full_DefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember" xlink:title="Definition : ifrs-full_DefinedBenefitPlansAxis to ifrs-full_DefinedBenefitPlansMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasPensionPlanMember" xlink:label="csan_ComgasPensionPlanMember" xlink:title="csan_ComgasPensionPlanMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="csan_ComgasPensionPlanMember" xlink:title="Definition : ifrs-full_DefinedBenefitPlansMember to csan_ComgasPensionPlanMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FuturaPensionPlanMember" xlink:label="csan_FuturaPensionPlanMember" xlink:title="csan_FuturaPensionPlanMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="csan_FuturaPensionPlanMember" xlink:title="Definition : ifrs-full_DefinedBenefitPlansMember to csan_FuturaPensionPlanMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FuturaTwoPensionPlanMember" xlink:label="csan_FuturaTwoPensionPlanMember" xlink:title="csan_FuturaTwoPensionPlanMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="csan_FuturaTwoPensionPlanMember" xlink:title="Definition : ifrs-full_DefinedBenefitPlansMember to csan_FuturaTwoPensionPlanMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember_1" xlink:title="ifrs-full_DefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember_1" xlink:title="Definition : ifrs-full_DefinedBenefitPlansAxis to ifrs-full_DefinedBenefitPlansMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:label="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:title="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:to="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:title="Definition : ifrs-full_DisclosureOfDefinedBenefitPlansTable to ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:label="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:title="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:to="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:title="Definition : ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis to ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DefinedContributionMember" xlink:label="csan_DefinedContributionMember" xlink:title="csan_DefinedContributionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:to="csan_DefinedContributionMember" xlink:title="Definition : ifrs-full_CharacteristicsOfDefinedBenefitPlansMember to csan_DefinedContributionMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DefinedBenefitMember" xlink:label="csan_DefinedBenefitMember" xlink:title="csan_DefinedBenefitMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:to="csan_DefinedBenefitMember" xlink:title="Definition : ifrs-full_CharacteristicsOfDefinedBenefitPlansMember to csan_DefinedBenefitMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember" xlink:label="ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember" xlink:title="ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:to="ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember" xlink:title="Definition : ifrs-full_CharacteristicsOfDefinedBenefitPlansMember to ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:label="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember_1" xlink:title="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:to="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember_1" xlink:title="Definition : ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis to ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PostemploymentBenefitExpenseDefinedBenefitPlans" xlink:label="ifrs-full_PostemploymentBenefitExpenseDefinedBenefitPlans" xlink:title="ifrs-full_PostemploymentBenefitExpenseDefinedBenefitPlans"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:to="ifrs-full_PostemploymentBenefitExpenseDefinedBenefitPlans" xlink:title="Definition : ifrs-full_DisclosureOfDefinedBenefitPlansLineItems to ifrs-full_PostemploymentBenefitExpenseDefinedBenefitPlans" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
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| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/PostEmploymentBenefitsAdditionalInformationDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:label="ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:title="ifrs-full_DisclosureOfDefinedBenefitPlansLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContributionsToPlanNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_ContributionsToPlanNetDefinedBenefitLiabilityAsset" xlink:title="ifrs-full_ContributionsToPlanNetDefinedBenefitLiabilityAsset"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:to="ifrs-full_ContributionsToPlanNetDefinedBenefitLiabilityAsset" xlink:title="Definition : ifrs-full_DisclosureOfDefinedBenefitPlansLineItems to ifrs-full_ContributionsToPlanNetDefinedBenefitLiabilityAsset" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfChangesInMethodsAndAssumptionsUsedInPreparingSensitivityAnalysisForActuarialAssumptions" xlink:label="ifrs-full_DescriptionOfChangesInMethodsAndAssumptionsUsedInPreparingSensitivityAnalysisForActuarialAssumptions" xlink:title="ifrs-full_DescriptionOfChangesInMethodsAndAssumptionsUsedInPreparingSensitivityAnalysisForActuarialAssumptions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:to="ifrs-full_DescriptionOfChangesInMethodsAndAssumptionsUsedInPreparingSensitivityAnalysisForActuarialAssumptions" xlink:title="Definition : ifrs-full_DisclosureOfDefinedBenefitPlansLineItems to ifrs-full_DescriptionOfChangesInMethodsAndAssumptionsUsedInPreparingSensitivityAnalysisForActuarialAssumptions" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:label="ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:title="ifrs-full_DisclosureOfDefinedBenefitPlansTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:to="ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:title="Definition : ifrs-full_DisclosureOfDefinedBenefitPlansLineItems to ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:type="arc" use="optional" order="2" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis" xlink:label="ifrs-full_DefinedBenefitPlansAxis" xlink:title="ifrs-full_DefinedBenefitPlansAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:to="ifrs-full_DefinedBenefitPlansAxis" xlink:title="Definition : ifrs-full_DisclosureOfDefinedBenefitPlansTable to ifrs-full_DefinedBenefitPlansAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember" xlink:title="ifrs-full_DefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember" xlink:title="Definition : ifrs-full_DefinedBenefitPlansAxis to ifrs-full_DefinedBenefitPlansMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasPensionPlanMember" xlink:label="csan_ComgasPensionPlanMember" xlink:title="csan_ComgasPensionPlanMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="csan_ComgasPensionPlanMember" xlink:title="Definition : ifrs-full_DefinedBenefitPlansMember to csan_ComgasPensionPlanMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FuturaPensionPlanMember" xlink:label="csan_FuturaPensionPlanMember" xlink:title="csan_FuturaPensionPlanMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="csan_FuturaPensionPlanMember" xlink:title="Definition : ifrs-full_DefinedBenefitPlansMember to csan_FuturaPensionPlanMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember_1" xlink:title="ifrs-full_DefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember_1" xlink:title="Definition : ifrs-full_DefinedBenefitPlansAxis to ifrs-full_DefinedBenefitPlansMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:label="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:title="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:to="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:title="Definition : ifrs-full_DisclosureOfDefinedBenefitPlansTable to ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:label="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:title="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:to="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:title="Definition : ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis to ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember" xlink:label="ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember" xlink:title="ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:to="ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember" xlink:title="Definition : ifrs-full_CharacteristicsOfDefinedBenefitPlansMember to ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:label="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember_1" xlink:title="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:to="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember_1" xlink:title="Definition : ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis to ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:label="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:title="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:to="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:title="Definition : ifrs-full_DisclosureOfDefinedBenefitPlansTable to ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsMember" xlink:label="ifrs-full_NonadjustingEventsMember" xlink:title="ifrs-full_NonadjustingEventsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsMember" xlink:title="Definition : ifrs-full_NonadjustingEventsAfterReportingPeriodAxis to ifrs-full_NonadjustingEventsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DefinedBenefitObligationMember" xlink:label="csan_DefinedBenefitObligationMember" xlink:title="csan_DefinedBenefitObligationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NonadjustingEventsMember" xlink:to="csan_DefinedBenefitObligationMember" xlink:title="Definition : ifrs-full_NonadjustingEventsMember to csan_DefinedBenefitObligationMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsMember" xlink:label="ifrs-full_NonadjustingEventsMember_1" xlink:title="ifrs-full_NonadjustingEventsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsMember_1" xlink:title="Definition : ifrs-full_NonadjustingEventsAfterReportingPeriodAxis to ifrs-full_NonadjustingEventsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : ifrs-full_DisclosureOfDefinedBenefitPlansTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CLEMember" xlink:label="csan_CLEMember" xlink:title="csan_CLEMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CLEMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CLEMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_WeightedAverageDurationOfDefinedBenefitObligation2019" xlink:label="ifrs-full_WeightedAverageDurationOfDefinedBenefitObligation2019" xlink:title="ifrs-full_WeightedAverageDurationOfDefinedBenefitObligation2019"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:to="ifrs-full_WeightedAverageDurationOfDefinedBenefitObligation2019" xlink:title="Definition : ifrs-full_DisclosureOfDefinedBenefitPlansLineItems to ifrs-full_WeightedAverageDurationOfDefinedBenefitObligation2019" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ExpectedDurationOfContributionToSocialSecurityForEntitledToDefinedBenefitPlan" xlink:label="csan_ExpectedDurationOfContributionToSocialSecurityForEntitledToDefinedBenefitPlan" xlink:title="csan_ExpectedDurationOfContributionToSocialSecurityForEntitledToDefinedBenefitPlan"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:to="csan_ExpectedDurationOfContributionToSocialSecurityForEntitledToDefinedBenefitPlan" xlink:title="Definition : ifrs-full_DisclosureOfDefinedBenefitPlansLineItems to csan_ExpectedDurationOfContributionToSocialSecurityForEntitledToDefinedBenefitPlan" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ExpectedServiceDurationForEntitledToDefinedBenefitPlan" xlink:label="csan_ExpectedServiceDurationForEntitledToDefinedBenefitPlan" xlink:title="csan_ExpectedServiceDurationForEntitledToDefinedBenefitPlan"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:to="csan_ExpectedServiceDurationForEntitledToDefinedBenefitPlan" xlink:title="Definition : ifrs-full_DisclosureOfDefinedBenefitPlansLineItems to csan_ExpectedServiceDurationForEntitledToDefinedBenefitPlan" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/PostEmploymentBenefitsSummaryOfDefinedBenefitObligationAndFairValueOfPlanAssetsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems" xlink:label="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems" xlink:title="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset" xlink:title="ifrs-full_ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems" xlink:to="ifrs-full_ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset" xlink:title="Definition : ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems to ifrs-full_ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset" xlink:title="ifrs-full_ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems" xlink:to="ifrs-full_ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset" xlink:title="Definition : ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems to ifrs-full_ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset" xlink:title="ifrs-full_ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems" xlink:to="ifrs-full_ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset" xlink:title="Definition : ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems to ifrs-full_ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ContributionsToPlanNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_ContributionsToPlanNetDefinedBenefitLiabilityAsset" xlink:title="ifrs-full_ContributionsToPlanNetDefinedBenefitLiabilityAsset"/> |
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| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems" xlink:to="ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset" xlink:title="Definition : ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems to ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable" xlink:label="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable" xlink:title="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems" xlink:to="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable" xlink:title="Definition : ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems to ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable" xlink:type="arc" use="optional" order="5" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetAxis" xlink:label="ifrs-full_NetDefinedBenefitLiabilityAssetAxis" xlink:title="ifrs-full_NetDefinedBenefitLiabilityAssetAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable" xlink:to="ifrs-full_NetDefinedBenefitLiabilityAssetAxis" xlink:title="Definition : ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable to ifrs-full_NetDefinedBenefitLiabilityAssetAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetMember" xlink:label="ifrs-full_NetDefinedBenefitLiabilityAssetMember" xlink:title="ifrs-full_NetDefinedBenefitLiabilityAssetMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_NetDefinedBenefitLiabilityAssetAxis" xlink:to="ifrs-full_NetDefinedBenefitLiabilityAssetMember" xlink:title="Definition : ifrs-full_NetDefinedBenefitLiabilityAssetAxis to ifrs-full_NetDefinedBenefitLiabilityAssetMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PlanAssetsMember" xlink:label="ifrs-full_PlanAssetsMember" xlink:title="ifrs-full_PlanAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NetDefinedBenefitLiabilityAssetMember" xlink:to="ifrs-full_PlanAssetsMember" xlink:title="Definition : ifrs-full_NetDefinedBenefitLiabilityAssetMember to ifrs-full_PlanAssetsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PresentValueOfDefinedBenefitObligationMember" xlink:label="ifrs-full_PresentValueOfDefinedBenefitObligationMember" xlink:title="ifrs-full_PresentValueOfDefinedBenefitObligationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NetDefinedBenefitLiabilityAssetMember" xlink:to="ifrs-full_PresentValueOfDefinedBenefitObligationMember" xlink:title="Definition : ifrs-full_NetDefinedBenefitLiabilityAssetMember to ifrs-full_PresentValueOfDefinedBenefitObligationMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetMember" xlink:label="ifrs-full_NetDefinedBenefitLiabilityAssetMember_1" xlink:title="ifrs-full_NetDefinedBenefitLiabilityAssetMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_NetDefinedBenefitLiabilityAssetAxis" xlink:to="ifrs-full_NetDefinedBenefitLiabilityAssetMember_1" xlink:title="Definition : ifrs-full_NetDefinedBenefitLiabilityAssetAxis to ifrs-full_NetDefinedBenefitLiabilityAssetMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GainLossOnAssetsGreaterThanDiscountRateToPlanNetDefinedBenefitLiabilityAsset" xlink:label="csan_GainLossOnAssetsGreaterThanDiscountRateToPlanNetDefinedBenefitLiabilityAsset" xlink:title="csan_GainLossOnAssetsGreaterThanDiscountRateToPlanNetDefinedBenefitLiabilityAsset"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems" xlink:to="csan_GainLossOnAssetsGreaterThanDiscountRateToPlanNetDefinedBenefitLiabilityAsset" xlink:title="Definition : ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems to csan_GainLossOnAssetsGreaterThanDiscountRateToPlanNetDefinedBenefitLiabilityAsset" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset" xlink:title="ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems" xlink:to="ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset" xlink:title="Definition : ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems to ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:label="ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:title="ifrs-full_LiabilityAssetOfDefinedBenefitPlans"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems" xlink:to="ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:title="Definition : ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems to ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NetDefinedBenefitLiability" xlink:label="csan_NetDefinedBenefitLiability" xlink:title="csan_NetDefinedBenefitLiability"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems" xlink:to="csan_NetDefinedBenefitLiability" xlink:title="Definition : ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems to csan_NetDefinedBenefitLiability" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset" xlink:label="ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset" xlink:title="ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems" xlink:to="ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset" xlink:title="Definition : ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems to ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SurplusDeficitInPlan" xlink:label="ifrs-full_SurplusDeficitInPlan" xlink:title="ifrs-full_SurplusDeficitInPlan"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems" xlink:to="ifrs-full_SurplusDeficitInPlan" xlink:title="Definition : ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems to ifrs-full_SurplusDeficitInPlan" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
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| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/PostEmploymentBenefitsSummaryOfPlanAssetsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems" xlink:label="ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems" xlink:title="ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfFairValueOfPlanAssetsTable" xlink:label="ifrs-full_DisclosureOfFairValueOfPlanAssetsTable" xlink:title="ifrs-full_DisclosureOfFairValueOfPlanAssetsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems" xlink:to="ifrs-full_DisclosureOfFairValueOfPlanAssetsTable" xlink:title="Definition : ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems to ifrs-full_DisclosureOfFairValueOfPlanAssetsTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsAxis" xlink:label="ifrs-full_ClassesOfAssetsAxis" xlink:title="ifrs-full_ClassesOfAssetsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfFairValueOfPlanAssetsTable" xlink:to="ifrs-full_ClassesOfAssetsAxis" xlink:title="Definition : ifrs-full_DisclosureOfFairValueOfPlanAssetsTable to ifrs-full_ClassesOfAssetsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember" xlink:title="ifrs-full_ClassesOfAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsAxis to ifrs-full_ClassesOfAssetsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FixedIncomeBondsMember" xlink:label="csan_FixedIncomeBondsMember" xlink:title="csan_FixedIncomeBondsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="csan_FixedIncomeBondsMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsMember to csan_FixedIncomeBondsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherSecuritiesMember" xlink:label="csan_OtherSecuritiesMember" xlink:title="csan_OtherSecuritiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="csan_OtherSecuritiesMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsMember to csan_OtherSecuritiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_VariableIncomeSecuritiesMember" xlink:label="csan_VariableIncomeSecuritiesMember" xlink:title="csan_VariableIncomeSecuritiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="csan_VariableIncomeSecuritiesMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsMember to csan_VariableIncomeSecuritiesMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember_1" xlink:title="ifrs-full_ClassesOfAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember_1" xlink:title="Definition : ifrs-full_ClassesOfAssetsAxis to ifrs-full_ClassesOfAssetsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfFairValueOfPlanAssets" xlink:label="csan_PercentageOfFairValueOfPlanAssets" xlink:title="csan_PercentageOfFairValueOfPlanAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems" xlink:to="csan_PercentageOfFairValueOfPlanAssets" xlink:title="Definition : ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems to csan_PercentageOfFairValueOfPlanAssets" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PlanAssetsAtFairValue" xlink:label="ifrs-full_PlanAssetsAtFairValue" xlink:title="ifrs-full_PlanAssetsAtFairValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems" xlink:to="ifrs-full_PlanAssetsAtFairValue" xlink:title="Definition : ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems to ifrs-full_PlanAssetsAtFairValue" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
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| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/PostEmploymentBenefitsSummaryOfAssumptionsToDetermineDefinedBenefitObligationsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:label="ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:title="ifrs-full_DisclosureOfDefinedBenefitPlansLineItems"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionOfExpectedRatesOfInflation" xlink:label="ifrs-full_ActuarialAssumptionOfExpectedRatesOfInflation" xlink:title="ifrs-full_ActuarialAssumptionOfExpectedRatesOfInflation"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionOfExpectedRatesOfPensionIncreases" xlink:label="ifrs-full_ActuarialAssumptionOfExpectedRatesOfPensionIncreases" xlink:title="ifrs-full_ActuarialAssumptionOfExpectedRatesOfPensionIncreases"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreases" xlink:label="ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreases" xlink:title="ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreases"/> |
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| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:to="ifrs-full_DefinedBenefitPlansAxis" xlink:title="Definition : ifrs-full_DisclosureOfDefinedBenefitPlansTable to ifrs-full_DefinedBenefitPlansAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
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| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember" xlink:title="Definition : ifrs-full_DefinedBenefitPlansAxis to ifrs-full_DefinedBenefitPlansMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasPensionPlanMember" xlink:label="csan_ComgasPensionPlanMember" xlink:title="csan_ComgasPensionPlanMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="csan_ComgasPensionPlanMember" xlink:title="Definition : ifrs-full_DefinedBenefitPlansMember to csan_ComgasPensionPlanMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FuturaPensionPlanMember" xlink:label="csan_FuturaPensionPlanMember" xlink:title="csan_FuturaPensionPlanMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="csan_FuturaPensionPlanMember" xlink:title="Definition : ifrs-full_DefinedBenefitPlansMember to csan_FuturaPensionPlanMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember_1" xlink:title="ifrs-full_DefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember_1" xlink:title="Definition : ifrs-full_DefinedBenefitPlansAxis to ifrs-full_DefinedBenefitPlansMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:label="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:title="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:to="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:title="Definition : ifrs-full_DisclosureOfDefinedBenefitPlansTable to ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:label="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:title="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:to="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:title="Definition : ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis to ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DefinedBenefitMember" xlink:label="csan_DefinedBenefitMember" xlink:title="csan_DefinedBenefitMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:to="csan_DefinedBenefitMember" xlink:title="Definition : ifrs-full_CharacteristicsOfDefinedBenefitPlansMember to csan_DefinedBenefitMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember" xlink:label="ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember" xlink:title="ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:to="ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember" xlink:title="Definition : ifrs-full_CharacteristicsOfDefinedBenefitPlansMember to ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:label="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember_1" xlink:title="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:to="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember_1" xlink:title="Definition : ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis to ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/PostEmploymentBenefitsSummaryOfChangesInDiscountRateDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems" xlink:label="ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems" xlink:title="ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable" xlink:label="ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable" xlink:title="ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems" xlink:to="ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable" xlink:title="Definition : ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems to ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis" xlink:label="ifrs-full_DefinedBenefitPlansAxis" xlink:title="ifrs-full_DefinedBenefitPlansAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable" xlink:to="ifrs-full_DefinedBenefitPlansAxis" xlink:title="Definition : ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable to ifrs-full_DefinedBenefitPlansAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember" xlink:title="ifrs-full_DefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember" xlink:title="Definition : ifrs-full_DefinedBenefitPlansAxis to ifrs-full_DefinedBenefitPlansMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasPensionPlanMember" xlink:label="csan_ComgasPensionPlanMember" xlink:title="csan_ComgasPensionPlanMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="csan_ComgasPensionPlanMember" xlink:title="Definition : ifrs-full_DefinedBenefitPlansMember to csan_ComgasPensionPlanMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FuturaPensionPlanMember" xlink:label="csan_FuturaPensionPlanMember" xlink:title="csan_FuturaPensionPlanMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DefinedBenefitPlansMember" xlink:to="csan_FuturaPensionPlanMember" xlink:title="Definition : ifrs-full_DefinedBenefitPlansMember to csan_FuturaPensionPlanMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DefinedBenefitPlansMember" xlink:label="ifrs-full_DefinedBenefitPlansMember_1" xlink:title="ifrs-full_DefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_DefinedBenefitPlansAxis" xlink:to="ifrs-full_DefinedBenefitPlansMember_1" xlink:title="Definition : ifrs-full_DefinedBenefitPlansAxis to ifrs-full_DefinedBenefitPlansMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:label="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:title="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable" xlink:to="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:title="Definition : ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable to ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:label="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:title="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:to="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:title="Definition : ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis to ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DefinedBenefitMember" xlink:label="csan_DefinedBenefitMember" xlink:title="csan_DefinedBenefitMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:to="csan_DefinedBenefitMember" xlink:title="Definition : ifrs-full_CharacteristicsOfDefinedBenefitPlansMember to csan_DefinedBenefitMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember" xlink:label="ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember" xlink:title="ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:to="ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember" xlink:title="Definition : ifrs-full_CharacteristicsOfDefinedBenefitPlansMember to ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:label="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember_1" xlink:title="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:to="ifrs-full_CharacteristicsOfDefinedBenefitPlansMember_1" xlink:title="Definition : ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis to ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption" xlink:label="ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption" xlink:title="ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems" xlink:to="ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption" xlink:title="Definition : ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems to ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption" xlink:label="ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption" xlink:title="ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems" xlink:to="ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption" xlink:title="Definition : ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems to ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ShareBasedPaymentSummaryOfStockOptionActivityDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfStockOptionActivityLineItems" xlink:label="csan_DisclosureOfStockOptionActivityLineItems" xlink:title="csan_DisclosureOfStockOptionActivityLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:label="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:title="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfStockOptionActivityLineItems" xlink:to="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:title="Definition : csan_DisclosureOfStockOptionActivityLineItems to ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAIndustriaeComercioMember" xlink:label="csan_CosanSAIndustriaeComercioMember" xlink:title="csan_CosanSAIndustriaeComercioMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanSAIndustriaeComercioMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanSAIndustriaeComercioMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:title="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:to="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:title="Definition : ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable to ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SharebasedPaymentArrangementsMember" xlink:label="ifrs-full_SharebasedPaymentArrangementsMember" xlink:title="ifrs-full_SharebasedPaymentArrangementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_SharebasedPaymentArrangementsMember" xlink:title="Definition : ifrs-full_TypesOfSharebasedPaymentArrangementsAxis to ifrs-full_SharebasedPaymentArrangementsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DecemberTwelveTwoThousandTwelveMember" xlink:label="csan_DecemberTwelveTwoThousandTwelveMember" xlink:title="csan_DecemberTwelveTwoThousandTwelveMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SharebasedPaymentArrangementsMember" xlink:to="csan_DecemberTwelveTwoThousandTwelveMember" xlink:title="Definition : ifrs-full_SharebasedPaymentArrangementsMember to csan_DecemberTwelveTwoThousandTwelveMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AprilTwentyFourTwoThousandThirteenMember" xlink:label="csan_AprilTwentyFourTwoThousandThirteenMember" xlink:title="csan_AprilTwentyFourTwoThousandThirteenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SharebasedPaymentArrangementsMember" xlink:to="csan_AprilTwentyFourTwoThousandThirteenMember" xlink:title="Definition : ifrs-full_SharebasedPaymentArrangementsMember to csan_AprilTwentyFourTwoThousandThirteenMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AprilTwentyFiveTwoThousandFourteenMember" xlink:label="csan_AprilTwentyFiveTwoThousandFourteenMember" xlink:title="csan_AprilTwentyFiveTwoThousandFourteenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SharebasedPaymentArrangementsMember" xlink:to="csan_AprilTwentyFiveTwoThousandFourteenMember" xlink:title="Definition : ifrs-full_SharebasedPaymentArrangementsMember to csan_AprilTwentyFiveTwoThousandFourteenMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AugustThirtyOneTwoThousandFifteenMember" xlink:label="csan_AugustThirtyOneTwoThousandFifteenMember" xlink:title="csan_AugustThirtyOneTwoThousandFifteenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SharebasedPaymentArrangementsMember" xlink:to="csan_AugustThirtyOneTwoThousandFifteenMember" xlink:title="Definition : ifrs-full_SharebasedPaymentArrangementsMember to csan_AugustThirtyOneTwoThousandFifteenMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AugustEighteenTwoThousandElevenOneMember" xlink:label="csan_AugustEighteenTwoThousandElevenOneMember" xlink:title="csan_AugustEighteenTwoThousandElevenOneMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SharebasedPaymentArrangementsMember" xlink:to="csan_AugustEighteenTwoThousandElevenOneMember" xlink:title="Definition : ifrs-full_SharebasedPaymentArrangementsMember to csan_AugustEighteenTwoThousandElevenOneMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AugustEighteenTwoThousandElevenTwoMember" xlink:label="csan_AugustEighteenTwoThousandElevenTwoMember" xlink:title="csan_AugustEighteenTwoThousandElevenTwoMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SharebasedPaymentArrangementsMember" xlink:to="csan_AugustEighteenTwoThousandElevenTwoMember" xlink:title="Definition : ifrs-full_SharebasedPaymentArrangementsMember to csan_AugustEighteenTwoThousandElevenTwoMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StockOptionProgramsMember" xlink:label="csan_StockOptionProgramsMember" xlink:title="csan_StockOptionProgramsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SharebasedPaymentArrangementsMember" xlink:to="csan_StockOptionProgramsMember" xlink:title="Definition : ifrs-full_SharebasedPaymentArrangementsMember to csan_StockOptionProgramsMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SharebasedPaymentArrangementsMember" xlink:label="ifrs-full_SharebasedPaymentArrangementsMember_1" xlink:title="ifrs-full_SharebasedPaymentArrangementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_SharebasedPaymentArrangementsMember_1" xlink:title="Definition : ifrs-full_TypesOfSharebasedPaymentArrangementsAxis to ifrs-full_SharebasedPaymentArrangementsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" xlink:title="ifrs-full_RangeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:to="ifrs-full_RangeAxis" xlink:title="Definition : ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable to ifrs-full_RangeAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BottomOfRangeMember" xlink:label="ifrs-full_BottomOfRangeMember" xlink:title="ifrs-full_BottomOfRangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_BottomOfRangeMember" xlink:title="Definition : ifrs-full_RangesMember to ifrs-full_BottomOfRangeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="ifrs-full_TopOfRangeMember" xlink:title="ifrs-full_TopOfRangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_TopOfRangeMember" xlink:title="Definition : ifrs-full_RangesMember to ifrs-full_TopOfRangeMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember_1" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember_1" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ProgramNameAxis" xlink:label="csan_ProgramNameAxis" xlink:title="csan_ProgramNameAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:to="csan_ProgramNameAxis" xlink:title="Definition : ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable to csan_ProgramNameAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ProgramNameDomain" xlink:label="csan_ProgramNameDomain" xlink:title="csan_ProgramNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_ProgramNameAxis" xlink:to="csan_ProgramNameDomain" xlink:title="Definition : csan_ProgramNameAxis to csan_ProgramNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ProgramNameDomain" xlink:label="csan_ProgramNameDomain_1" xlink:title="csan_ProgramNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_ProgramNameAxis" xlink:to="csan_ProgramNameDomain_1" xlink:title="Definition : csan_ProgramNameAxis to csan_ProgramNameDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DateOfGrantOfSharebasedPaymentArrangement" xlink:label="ifrs-full_DateOfGrantOfSharebasedPaymentArrangement" xlink:title="ifrs-full_DateOfGrantOfSharebasedPaymentArrangement"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfStockOptionActivityLineItems" xlink:to="ifrs-full_DateOfGrantOfSharebasedPaymentArrangement" xlink:title="Definition : csan_DisclosureOfStockOptionActivityLineItems to ifrs-full_DateOfGrantOfSharebasedPaymentArrangement" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NameOfSubsidiary" xlink:label="ifrs-full_NameOfSubsidiary" xlink:title="ifrs-full_NameOfSubsidiary"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfStockOptionActivityLineItems" xlink:to="ifrs-full_NameOfSubsidiary" xlink:title="Definition : csan_DisclosureOfStockOptionActivityLineItems to ifrs-full_NameOfSubsidiary" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ReplacementOfStockOptionPlan" xlink:label="csan_ReplacementOfStockOptionPlan" xlink:title="csan_ReplacementOfStockOptionPlan"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfStockOptionActivityLineItems" xlink:to="csan_ReplacementOfStockOptionPlan" xlink:title="Definition : csan_DisclosureOfStockOptionActivityLineItems to csan_ReplacementOfStockOptionPlan" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019" xlink:label="ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019" xlink:title="ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfStockOptionActivityLineItems" xlink:to="ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019" xlink:title="Definition : csan_DisclosureOfStockOptionActivityLineItems to ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ShareBasedPaymentSummaryOfShareBasedPaymentArrangementsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:title="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DateOfGrantOfSharebasedPaymentArrangement" xlink:label="ifrs-full_DateOfGrantOfSharebasedPaymentArrangement" xlink:title="ifrs-full_DateOfGrantOfSharebasedPaymentArrangement"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DateOfGrantOfSharebasedPaymentArrangement" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_DateOfGrantOfSharebasedPaymentArrangement" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NameOfSubsidiary" xlink:label="ifrs-full_NameOfSubsidiary" xlink:title="ifrs-full_NameOfSubsidiary"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_NameOfSubsidiary" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_NameOfSubsidiary" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019" xlink:label="ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019" xlink:title="ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:label="ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:title="ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfShareOptionsExercisedCanceledTransferred" xlink:label="csan_NumberOfShareOptionsExercisedCanceledTransferred" xlink:title="csan_NumberOfShareOptionsExercisedCanceledTransferred"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="csan_NumberOfShareOptionsExercisedCanceledTransferred" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to csan_NumberOfShareOptionsExercisedCanceledTransferred" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfOutstandingShareOptions" xlink:label="ifrs-full_NumberOfOutstandingShareOptions" xlink:title="ifrs-full_NumberOfOutstandingShareOptions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_NumberOfOutstandingShareOptions" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_NumberOfOutstandingShareOptions" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:title="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:type="arc" use="optional" order="6" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" xlink:title="ifrs-full_RangeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="ifrs-full_RangeAxis" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable to ifrs-full_RangeAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BottomOfRangeMember" xlink:label="ifrs-full_BottomOfRangeMember" xlink:title="ifrs-full_BottomOfRangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_BottomOfRangeMember" xlink:title="Definition : ifrs-full_RangesMember to ifrs-full_BottomOfRangeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="ifrs-full_TopOfRangeMember" xlink:title="ifrs-full_TopOfRangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_TopOfRangeMember" xlink:title="Definition : ifrs-full_RangesMember to ifrs-full_TopOfRangeMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember_1" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember_1" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAIndustriaeComercioMember" xlink:label="csan_CosanSAIndustriaeComercioMember" xlink:title="csan_CosanSAIndustriaeComercioMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanSAIndustriaeComercioMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanSAIndustriaeComercioMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasMember" xlink:label="csan_ComgasMember" xlink:title="csan_ComgasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ComgasMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ComgasMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasAndCompassGasEEnergiaSAMember" xlink:label="csan_ComgasAndCompassGasEEnergiaSAMember" xlink:title="csan_ComgasAndCompassGasEEnergiaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ComgasAndCompassGasEEnergiaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ComgasAndCompassGasEEnergiaSAMember" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoSAMember" xlink:label="csan_RumoSAMember" xlink:title="csan_RumoSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoSAMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLimitedMember" xlink:label="csan_CosanLimitedMember" xlink:title="csan_CosanLimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanLimitedMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanLimitedMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MooveMember" xlink:label="csan_MooveMember" xlink:title="csan_MooveMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_MooveMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_MooveMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLimitedAndMooveMember" xlink:label="csan_CosanLimitedAndMooveMember" xlink:title="csan_CosanLimitedAndMooveMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanLimitedAndMooveMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanLimitedAndMooveMember" xlink:type="arc" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLogisticaMember" xlink:label="csan_CosanLogisticaMember" xlink:title="csan_CosanLogisticaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanLogisticaMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanLogisticaMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompassGasEEnergiaSAMember" xlink:label="csan_CompassGasEEnergiaSAMember" xlink:title="csan_CompassGasEEnergiaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CompassGasEEnergiaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CompassGasEEnergiaSAMember" xlink:type="arc" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AwardDatesAxis" xlink:label="csan_AwardDatesAxis" xlink:title="csan_AwardDatesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="csan_AwardDatesAxis" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable to csan_AwardDatesAxis" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AwardDatesDomain" xlink:label="csan_AwardDatesDomain" xlink:title="csan_AwardDatesDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_AwardDatesAxis" xlink:to="csan_AwardDatesDomain" xlink:title="Definition : csan_AwardDatesAxis to csan_AwardDatesDomain" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AprilTwentySevenTwoThousandSeventeenMember" xlink:label="csan_AprilTwentySevenTwoThousandSeventeenMember" xlink:title="csan_AprilTwentySevenTwoThousandSeventeenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_AprilTwentySevenTwoThousandSeventeenMember" xlink:title="Definition : csan_AwardDatesDomain to csan_AprilTwentySevenTwoThousandSeventeenMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_JulyThirtyOneTwoThousandSeventeenMember" xlink:label="csan_JulyThirtyOneTwoThousandSeventeenMember" xlink:title="csan_JulyThirtyOneTwoThousandSeventeenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_JulyThirtyOneTwoThousandSeventeenMember" xlink:title="Definition : csan_AwardDatesDomain to csan_JulyThirtyOneTwoThousandSeventeenMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_JulyThirtyOneTwoThousandEighteenMember" xlink:label="csan_JulyThirtyOneTwoThousandEighteenMember" xlink:title="csan_JulyThirtyOneTwoThousandEighteenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_JulyThirtyOneTwoThousandEighteenMember" xlink:title="Definition : csan_AwardDatesDomain to csan_JulyThirtyOneTwoThousandEighteenMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_JulyThirtyOneTwoThousandNineteenMember" xlink:label="csan_JulyThirtyOneTwoThousandNineteenMember" xlink:title="csan_JulyThirtyOneTwoThousandNineteenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_JulyThirtyOneTwoThousandNineteenMember" xlink:title="Definition : csan_AwardDatesDomain to csan_JulyThirtyOneTwoThousandNineteenMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_July31St2020Member" xlink:label="csan_July31St2020Member" xlink:title="csan_July31St2020Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_July31St2020Member" xlink:title="Definition : csan_AwardDatesDomain to csan_July31St2020Member" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AprilTwentyTwoThousandSeventeenMember" xlink:label="csan_AprilTwentyTwoThousandSeventeenMember" xlink:title="csan_AprilTwentyTwoThousandSeventeenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_AprilTwentyTwoThousandSeventeenMember" xlink:title="Definition : csan_AwardDatesDomain to csan_AprilTwentyTwoThousandSeventeenMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AugustTwelveTwoThousandSeventeenMember" xlink:label="csan_AugustTwelveTwoThousandSeventeenMember" xlink:title="csan_AugustTwelveTwoThousandSeventeenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_AugustTwelveTwoThousandSeventeenMember" xlink:title="Definition : csan_AwardDatesDomain to csan_AugustTwelveTwoThousandSeventeenMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AugustOneTwoThousandEighteenMember" xlink:label="csan_AugustOneTwoThousandEighteenMember" xlink:title="csan_AugustOneTwoThousandEighteenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_AugustOneTwoThousandEighteenMember" xlink:title="Definition : csan_AwardDatesDomain to csan_AugustOneTwoThousandEighteenMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_February01St2020Member" xlink:label="csan_February01St2020Member" xlink:title="csan_February01St2020Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_February01St2020Member" xlink:title="Definition : csan_AwardDatesDomain to csan_February01St2020Member" xlink:type="arc" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OctoberOneTwoThousandFifteenOneMember" xlink:label="csan_OctoberOneTwoThousandFifteenOneMember" xlink:title="csan_OctoberOneTwoThousandFifteenOneMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_OctoberOneTwoThousandFifteenOneMember" xlink:title="Definition : csan_AwardDatesDomain to csan_OctoberOneTwoThousandFifteenOneMember" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_JanuaryTwoTwoThousandSeventeenMember" xlink:label="csan_JanuaryTwoTwoThousandSeventeenMember" xlink:title="csan_JanuaryTwoTwoThousandSeventeenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_JanuaryTwoTwoThousandSeventeenMember" xlink:title="Definition : csan_AwardDatesDomain to csan_JanuaryTwoTwoThousandSeventeenMember" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeptemberOneTwoThousandSeventeenMember" xlink:label="csan_SeptemberOneTwoThousandSeventeenMember" xlink:title="csan_SeptemberOneTwoThousandSeventeenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_SeptemberOneTwoThousandSeventeenMember" xlink:title="Definition : csan_AwardDatesDomain to csan_SeptemberOneTwoThousandSeventeenMember" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AugustFifteenTwoThousandNineteenMember" xlink:label="csan_AugustFifteenTwoThousandNineteenMember" xlink:title="csan_AugustFifteenTwoThousandNineteenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_AugustFifteenTwoThousandNineteenMember" xlink:title="Definition : csan_AwardDatesDomain to csan_AugustFifteenTwoThousandNineteenMember" xlink:type="arc" use="optional" order="12" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_August15Th2019TwoMember" xlink:label="csan_August15Th2019TwoMember" xlink:title="csan_August15Th2019TwoMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_August15Th2019TwoMember" xlink:title="Definition : csan_AwardDatesDomain to csan_August15Th2019TwoMember" xlink:type="arc" order="13" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AugustEighteenTwoThousandElevenTwoMember" xlink:label="csan_AugustEighteenTwoThousandElevenTwoMember" xlink:title="csan_AugustEighteenTwoThousandElevenTwoMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_AugustEighteenTwoThousandElevenTwoMember" xlink:title="Definition : csan_AwardDatesDomain to csan_AugustEighteenTwoThousandElevenTwoMember" xlink:type="arc" use="optional" order="14" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DecemberTwelveTwoThousandTwelveMember" xlink:label="csan_DecemberTwelveTwoThousandTwelveMember" xlink:title="csan_DecemberTwelveTwoThousandTwelveMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_DecemberTwelveTwoThousandTwelveMember" xlink:title="Definition : csan_AwardDatesDomain to csan_DecemberTwelveTwoThousandTwelveMember" xlink:type="arc" use="optional" order="15" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AprilTwentyFourTwoThousandThirteenMember" xlink:label="csan_AprilTwentyFourTwoThousandThirteenMember" xlink:title="csan_AprilTwentyFourTwoThousandThirteenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_AprilTwentyFourTwoThousandThirteenMember" xlink:title="Definition : csan_AwardDatesDomain to csan_AprilTwentyFourTwoThousandThirteenMember" xlink:type="arc" use="optional" order="16" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AprilTwentyFiveTwoThousandFourteenMember" xlink:label="csan_AprilTwentyFiveTwoThousandFourteenMember" xlink:title="csan_AprilTwentyFiveTwoThousandFourteenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_AprilTwentyFiveTwoThousandFourteenMember" xlink:title="Definition : csan_AwardDatesDomain to csan_AprilTwentyFiveTwoThousandFourteenMember" xlink:type="arc" use="optional" order="17" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AugustThirtyOneTwoThousandFifteenMember" xlink:label="csan_AugustThirtyOneTwoThousandFifteenMember" xlink:title="csan_AugustThirtyOneTwoThousandFifteenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_AugustThirtyOneTwoThousandFifteenMember" xlink:title="Definition : csan_AwardDatesDomain to csan_AugustThirtyOneTwoThousandFifteenMember" xlink:type="arc" use="optional" order="18" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AugustEighteenTwoThousandSeventeenMember" xlink:label="csan_AugustEighteenTwoThousandSeventeenMember" xlink:title="csan_AugustEighteenTwoThousandSeventeenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_AugustEighteenTwoThousandSeventeenMember" xlink:title="Definition : csan_AwardDatesDomain to csan_AugustEighteenTwoThousandSeventeenMember" xlink:type="arc" use="optional" order="19" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeptemberTwentyOneTwoThousandSeventeenMember" xlink:label="csan_SeptemberTwentyOneTwoThousandSeventeenMember" xlink:title="csan_SeptemberTwentyOneTwoThousandSeventeenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_SeptemberTwentyOneTwoThousandSeventeenMember" xlink:title="Definition : csan_AwardDatesDomain to csan_SeptemberTwentyOneTwoThousandSeventeenMember" xlink:type="arc" use="optional" order="20" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AugustEighteenTwoThousandSeventeenTwoMember" xlink:label="csan_AugustEighteenTwoThousandSeventeenTwoMember" xlink:title="csan_AugustEighteenTwoThousandSeventeenTwoMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_AwardDatesDomain" xlink:to="csan_AugustEighteenTwoThousandSeventeenTwoMember" xlink:title="Definition : csan_AwardDatesDomain to csan_AugustEighteenTwoThousandSeventeenTwoMember" xlink:type="arc" order="21" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AwardDatesDomain" xlink:label="csan_AwardDatesDomain_1" xlink:title="csan_AwardDatesDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_AwardDatesAxis" xlink:to="csan_AwardDatesDomain_1" xlink:title="Definition : csan_AwardDatesAxis to csan_AwardDatesDomain" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:title="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable to ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SharebasedPaymentArrangementsMember" xlink:label="ifrs-full_SharebasedPaymentArrangementsMember" xlink:title="ifrs-full_SharebasedPaymentArrangementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_SharebasedPaymentArrangementsMember" xlink:title="Definition : ifrs-full_TypesOfSharebasedPaymentArrangementsAxis to ifrs-full_SharebasedPaymentArrangementsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StockGrantProgramsMember" xlink:label="csan_StockGrantProgramsMember" xlink:title="csan_StockGrantProgramsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SharebasedPaymentArrangementsMember" xlink:to="csan_StockGrantProgramsMember" xlink:title="Definition : ifrs-full_SharebasedPaymentArrangementsMember to csan_StockGrantProgramsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StockGrantModificationMember" xlink:label="csan_StockGrantModificationMember" xlink:title="csan_StockGrantModificationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SharebasedPaymentArrangementsMember" xlink:to="csan_StockGrantModificationMember" xlink:title="Definition : ifrs-full_SharebasedPaymentArrangementsMember to csan_StockGrantModificationMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CashSettledTransactionsMember" xlink:label="csan_CashSettledTransactionsMember" xlink:title="csan_CashSettledTransactionsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SharebasedPaymentArrangementsMember" xlink:to="csan_CashSettledTransactionsMember" xlink:title="Definition : ifrs-full_SharebasedPaymentArrangementsMember to csan_CashSettledTransactionsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SharebasedPaymentArrangementsMember" xlink:label="ifrs-full_SharebasedPaymentArrangementsMember_1" xlink:title="ifrs-full_SharebasedPaymentArrangementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_SharebasedPaymentArrangementsMember_1" xlink:title="Definition : ifrs-full_TypesOfSharebasedPaymentArrangementsAxis to ifrs-full_SharebasedPaymentArrangementsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ProgramNameAxis" xlink:label="csan_ProgramNameAxis" xlink:title="csan_ProgramNameAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="csan_ProgramNameAxis" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable to csan_ProgramNameAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ProgramNameDomain" xlink:label="csan_ProgramNameDomain" xlink:title="csan_ProgramNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_ProgramNameAxis" xlink:to="csan_ProgramNameDomain" xlink:title="Definition : csan_ProgramNameAxis to csan_ProgramNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_ProgramNameDomain" xlink:to="csan_StockGrantModificationMember" xlink:title="Definition : csan_ProgramNameDomain to csan_StockGrantModificationMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ProgramNameDomain" xlink:label="csan_ProgramNameDomain_1" xlink:title="csan_ProgramNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_ProgramNameAxis" xlink:to="csan_ProgramNameDomain_1" xlink:title="Definition : csan_ProgramNameAxis to csan_ProgramNameDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ShareBasedPaymentSummaryOfWeightedAverageFairValueOfProgramsGrantedAndPrincipalAssumptionsUsedInApplyingBlackScholesModelDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:title="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:title="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasMember" xlink:label="csan_ComgasMember" xlink:title="csan_ComgasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ComgasMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ComgasMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAIndustriaeComercioMember" xlink:label="csan_CosanSAIndustriaeComercioMember" xlink:title="csan_CosanSAIndustriaeComercioMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanSAIndustriaeComercioMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanSAIndustriaeComercioMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoSAMember" xlink:label="csan_RumoSAMember" xlink:title="csan_RumoSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoSAMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompassGasEEnergiaMember" xlink:label="csan_CompassGasEEnergiaMember" xlink:title="csan_CompassGasEEnergiaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CompassGasEEnergiaMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CompassGasEEnergiaMember" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:title="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable to ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SharebasedPaymentArrangementsMember" xlink:label="ifrs-full_SharebasedPaymentArrangementsMember" xlink:title="ifrs-full_SharebasedPaymentArrangementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_SharebasedPaymentArrangementsMember" xlink:title="Definition : ifrs-full_TypesOfSharebasedPaymentArrangementsAxis to ifrs-full_SharebasedPaymentArrangementsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StockGrantProgramsMember" xlink:label="csan_StockGrantProgramsMember" xlink:title="csan_StockGrantProgramsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SharebasedPaymentArrangementsMember" xlink:to="csan_StockGrantProgramsMember" xlink:title="Definition : ifrs-full_SharebasedPaymentArrangementsMember to csan_StockGrantProgramsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SharebasedPaymentArrangementsMember" xlink:label="ifrs-full_SharebasedPaymentArrangementsMember_1" xlink:title="ifrs-full_SharebasedPaymentArrangementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_SharebasedPaymentArrangementsMember_1" xlink:title="Definition : ifrs-full_TypesOfSharebasedPaymentArrangementsAxis to ifrs-full_SharebasedPaymentArrangementsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted" xlink:label="ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted" xlink:title="ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted" xlink:label="ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted" xlink:title="ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ExpectedDividendAsPercentageShareOptionsGranted" xlink:label="ifrs-full_ExpectedDividendAsPercentageShareOptionsGranted" xlink:title="ifrs-full_ExpectedDividendAsPercentageShareOptionsGranted"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_ExpectedDividendAsPercentageShareOptionsGranted" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_ExpectedDividendAsPercentageShareOptionsGranted" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_WeightedAverageFairValueAtMeasurementDateShareOptionsGranted" xlink:label="ifrs-full_WeightedAverageFairValueAtMeasurementDateShareOptionsGranted" xlink:title="ifrs-full_WeightedAverageFairValueAtMeasurementDateShareOptionsGranted"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_WeightedAverageFairValueAtMeasurementDateShareOptionsGranted" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_WeightedAverageFairValueAtMeasurementDateShareOptionsGranted" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019" xlink:label="ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019" xlink:title="ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ShareBasedPaymentSummaryOfNumberAndWeightedAverageExercisePricesOfShareOptionsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:title="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:title="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:title="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable to ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SharebasedPaymentArrangementsMember" xlink:label="ifrs-full_SharebasedPaymentArrangementsMember" xlink:title="ifrs-full_SharebasedPaymentArrangementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_SharebasedPaymentArrangementsMember" xlink:title="Definition : ifrs-full_TypesOfSharebasedPaymentArrangementsAxis to ifrs-full_SharebasedPaymentArrangementsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StockGrantProgramsMember" xlink:label="csan_StockGrantProgramsMember" xlink:title="csan_StockGrantProgramsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SharebasedPaymentArrangementsMember" xlink:to="csan_StockGrantProgramsMember" xlink:title="Definition : ifrs-full_SharebasedPaymentArrangementsMember to csan_StockGrantProgramsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StockOptionProgramsMember" xlink:label="csan_StockOptionProgramsMember" xlink:title="csan_StockOptionProgramsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SharebasedPaymentArrangementsMember" xlink:to="csan_StockOptionProgramsMember" xlink:title="Definition : ifrs-full_SharebasedPaymentArrangementsMember to csan_StockOptionProgramsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SharebasedPaymentArrangementsMember" xlink:label="ifrs-full_SharebasedPaymentArrangementsMember_1" xlink:title="ifrs-full_SharebasedPaymentArrangementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_SharebasedPaymentArrangementsMember_1" xlink:title="Definition : ifrs-full_TypesOfSharebasedPaymentArrangementsAxis to ifrs-full_SharebasedPaymentArrangementsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfOutstandingShareOptions" xlink:label="ifrs-full_NumberOfOutstandingShareOptions" xlink:title="ifrs-full_NumberOfOutstandingShareOptions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_NumberOfOutstandingShareOptions" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_NumberOfOutstandingShareOptions" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement" xlink:label="ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement" xlink:title="ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:label="ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:title="ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfShareOptionsVestedInSharebasedPaymentArrangement" xlink:label="csan_NumberOfShareOptionsVestedInSharebasedPaymentArrangement" xlink:title="csan_NumberOfShareOptionsVestedInSharebasedPaymentArrangement"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="csan_NumberOfShareOptionsVestedInSharebasedPaymentArrangement" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to csan_NumberOfShareOptionsVestedInSharebasedPaymentArrangement" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfShareOptionsExercisedCanceledTransferred" xlink:label="csan_NumberOfShareOptionsExercisedCanceledTransferred" xlink:title="csan_NumberOfShareOptionsExercisedCanceledTransferred"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="csan_NumberOfShareOptionsExercisedCanceledTransferred" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to csan_NumberOfShareOptionsExercisedCanceledTransferred" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ShareBasedPaymentSummaryOfShareBasedCompensationExpenseDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:title="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:title="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:title="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable to ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SharebasedPaymentArrangementsMember" xlink:label="ifrs-full_SharebasedPaymentArrangementsMember" xlink:title="ifrs-full_SharebasedPaymentArrangementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_SharebasedPaymentArrangementsMember" xlink:title="Definition : ifrs-full_TypesOfSharebasedPaymentArrangementsAxis to ifrs-full_SharebasedPaymentArrangementsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StockGrantProgramsMember" xlink:label="csan_StockGrantProgramsMember" xlink:title="csan_StockGrantProgramsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SharebasedPaymentArrangementsMember" xlink:to="csan_StockGrantProgramsMember" xlink:title="Definition : ifrs-full_SharebasedPaymentArrangementsMember to csan_StockGrantProgramsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StockOptionProgramsMember" xlink:label="csan_StockOptionProgramsMember" xlink:title="csan_StockOptionProgramsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SharebasedPaymentArrangementsMember" xlink:to="csan_StockOptionProgramsMember" xlink:title="Definition : ifrs-full_SharebasedPaymentArrangementsMember to csan_StockOptionProgramsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SharebasedPaymentArrangementsMember" xlink:label="ifrs-full_SharebasedPaymentArrangementsMember_1" xlink:title="ifrs-full_SharebasedPaymentArrangementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_SharebasedPaymentArrangementsMember_1" xlink:title="Definition : ifrs-full_TypesOfSharebasedPaymentArrangementsAxis to ifrs-full_SharebasedPaymentArrangementsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:label="ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:title="ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:title="Definition : ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems to ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsLineItems" xlink:label="csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsLineItems" xlink:title="csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsTable" xlink:label="csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsTable" xlink:title="csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsLineItems" xlink:to="csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsTable" xlink:title="Definition : csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsLineItems to csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:label="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:title="ifrs-full_SignificantInvestmentsInAssociatesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsTable" xlink:to="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:title="Definition : csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsTable to ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember" xlink:title="ifrs-full_EntitysTotalForAssociatesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInAssociatesAxis to ifrs-full_EntitysTotalForAssociatesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanBiomassaSaMember" xlink:label="csan_CosanBiomassaSaMember" xlink:title="csan_CosanBiomassaSaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForAssociatesMember" xlink:to="csan_CosanBiomassaSaMember" xlink:title="Definition : ifrs-full_EntitysTotalForAssociatesMember to csan_CosanBiomassaSaMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForAssociatesMember" xlink:label="ifrs-full_EntitysTotalForAssociatesMember_1" xlink:title="ifrs-full_EntitysTotalForAssociatesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:to="ifrs-full_EntitysTotalForAssociatesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInAssociatesAxis to ifrs-full_EntitysTotalForAssociatesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProceedsFromChangesInOwnershipInterestsInSubsidiaries" xlink:label="ifrs-full_ProceedsFromChangesInOwnershipInterestsInSubsidiaries" xlink:title="ifrs-full_ProceedsFromChangesInOwnershipInterestsInSubsidiaries"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsLineItems" xlink:to="ifrs-full_ProceedsFromChangesInOwnershipInterestsInSubsidiaries" xlink:title="Definition : csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsLineItems to ifrs-full_ProceedsFromChangesInOwnershipInterestsInSubsidiaries" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_UnsecuredLiabilityRecognisedAsOfAcquisitionDate" xlink:label="csan_UnsecuredLiabilityRecognisedAsOfAcquisitionDate" xlink:title="csan_UnsecuredLiabilityRecognisedAsOfAcquisitionDate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsLineItems" xlink:to="csan_UnsecuredLiabilityRecognisedAsOfAcquisitionDate" xlink:title="Definition : csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsLineItems to csan_UnsecuredLiabilityRecognisedAsOfAcquisitionDate" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RevenueOfCombinedEntity" xlink:label="ifrs-full_RevenueOfCombinedEntity" xlink:title="ifrs-full_RevenueOfCombinedEntity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsLineItems" xlink:to="ifrs-full_RevenueOfCombinedEntity" xlink:title="Definition : csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsLineItems to ifrs-full_RevenueOfCombinedEntity" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BusinessAcquisitionRelatedExpense" xlink:label="csan_BusinessAcquisitionRelatedExpense" xlink:title="csan_BusinessAcquisitionRelatedExpense"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsLineItems" xlink:to="csan_BusinessAcquisitionRelatedExpense" xlink:title="Definition : csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsLineItems to csan_BusinessAcquisitionRelatedExpense" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GainLossThatRelatesToIdentifiableAssetsAcquiredOrLiabilitiesAssumedInBusinessCombination" xlink:label="ifrs-full_GainLossThatRelatesToIdentifiableAssetsAcquiredOrLiabilitiesAssumedInBusinessCombination" xlink:title="ifrs-full_GainLossThatRelatesToIdentifiableAssetsAcquiredOrLiabilitiesAssumedInBusinessCombination"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsLineItems" xlink:to="ifrs-full_GainLossThatRelatesToIdentifiableAssetsAcquiredOrLiabilitiesAssumedInBusinessCombination" xlink:title="Definition : csan_DisclosureOfStatementOfIncomeOfDiscontinuedOperationsLineItems to ifrs-full_GainLossThatRelatesToIdentifiableAssetsAcquiredOrLiabilitiesAssumedInBusinessCombination" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
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| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/SubsequentEventsAdditionalInformationDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:label="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:title="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RepaymentsOfBondsNotesAndDebentures" xlink:label="ifrs-full_RepaymentsOfBondsNotesAndDebentures" xlink:title="ifrs-full_RepaymentsOfBondsNotesAndDebentures"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="ifrs-full_RepaymentsOfBondsNotesAndDebentures" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems to ifrs-full_RepaymentsOfBondsNotesAndDebentures" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NotesAndDebenturesIssued" xlink:label="ifrs-full_NotesAndDebenturesIssued" xlink:title="ifrs-full_NotesAndDebenturesIssued"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="ifrs-full_NotesAndDebenturesIssued" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems to ifrs-full_NotesAndDebenturesIssued" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PeriodForSharesThatCanBeRepurchased" xlink:label="csan_PeriodForSharesThatCanBeRepurchased" xlink:title="csan_PeriodForSharesThatCanBeRepurchased"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="csan_PeriodForSharesThatCanBeRepurchased" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems to csan_PeriodForSharesThatCanBeRepurchased" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfSharesThatCanBeRepurchased" xlink:label="csan_NumberOfSharesThatCanBeRepurchased" xlink:title="csan_NumberOfSharesThatCanBeRepurchased"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="csan_NumberOfSharesThatCanBeRepurchased" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems to csan_NumberOfSharesThatCanBeRepurchased" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:label="ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:title="ifrs-full_PercentageOfVotingEquityInterestsAcquired"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems to ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfShareCapitalToBeIssuedOfSharesUnderBusinessCombinationAgreement" xlink:label="csan_PercentageOfShareCapitalToBeIssuedOfSharesUnderBusinessCombinationAgreement" xlink:title="csan_PercentageOfShareCapitalToBeIssuedOfSharesUnderBusinessCombinationAgreement"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="csan_PercentageOfShareCapitalToBeIssuedOfSharesUnderBusinessCombinationAgreement" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems to csan_PercentageOfShareCapitalToBeIssuedOfSharesUnderBusinessCombinationAgreement" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashTransferred" xlink:label="ifrs-full_CashTransferred" xlink:title="ifrs-full_CashTransferred"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="ifrs-full_CashTransferred" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems to ifrs-full_CashTransferred" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwners" xlink:label="ifrs-full_DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwners" xlink:title="ifrs-full_DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwners"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="ifrs-full_DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwners" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems to ifrs-full_DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwners" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:label="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:title="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems to ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:type="arc" use="optional" order="8" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:label="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:title="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:to="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable to ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsMember" xlink:label="ifrs-full_NonadjustingEventsMember" xlink:title="ifrs-full_NonadjustingEventsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsMember" xlink:title="Definition : ifrs-full_NonadjustingEventsAfterReportingPeriodAxis to ifrs-full_NonadjustingEventsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MajorBorrowingsMember" xlink:label="csan_MajorBorrowingsMember" xlink:title="csan_MajorBorrowingsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NonadjustingEventsMember" xlink:to="csan_MajorBorrowingsMember" xlink:title="Definition : ifrs-full_NonadjustingEventsMember to csan_MajorBorrowingsMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PotentialOrdinaryShareTransactionsMember" xlink:label="ifrs-full_PotentialOrdinaryShareTransactionsMember" xlink:title="ifrs-full_PotentialOrdinaryShareTransactionsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NonadjustingEventsMember" xlink:to="ifrs-full_PotentialOrdinaryShareTransactionsMember" xlink:title="Definition : ifrs-full_NonadjustingEventsMember to ifrs-full_PotentialOrdinaryShareTransactionsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MajorBusinessCombinationMember" xlink:label="ifrs-full_MajorBusinessCombinationMember" xlink:title="ifrs-full_MajorBusinessCombinationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NonadjustingEventsMember" xlink:to="ifrs-full_MajorBusinessCombinationMember" xlink:title="Definition : ifrs-full_NonadjustingEventsMember to ifrs-full_MajorBusinessCombinationMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ProposalOfDividendsMember" xlink:label="csan_ProposalOfDividendsMember" xlink:title="csan_ProposalOfDividendsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NonadjustingEventsMember" xlink:to="csan_ProposalOfDividendsMember" xlink:title="Definition : ifrs-full_NonadjustingEventsMember to csan_ProposalOfDividendsMember" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OrdinaryGeneralMeetingMember" xlink:label="csan_OrdinaryGeneralMeetingMember" xlink:title="csan_OrdinaryGeneralMeetingMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NonadjustingEventsMember" xlink:to="csan_OrdinaryGeneralMeetingMember" xlink:title="Definition : ifrs-full_NonadjustingEventsMember to csan_OrdinaryGeneralMeetingMember" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsMember" xlink:label="ifrs-full_NonadjustingEventsMember_1" xlink:title="ifrs-full_NonadjustingEventsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsMember_1" xlink:title="Definition : ifrs-full_NonadjustingEventsAfterReportingPeriodAxis to ifrs-full_NonadjustingEventsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="ifrs-full_BorrowingsByNameAxis" xlink:title="ifrs-full_BorrowingsByNameAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:to="ifrs-full_BorrowingsByNameAxis" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable to ifrs-full_BorrowingsByNameAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember" xlink:title="ifrs-full_BorrowingsByNameMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember" xlink:title="Definition : ifrs-full_BorrowingsByNameAxis to ifrs-full_BorrowingsByNameMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PromissoryNotesMember" xlink:label="csan_PromissoryNotesMember" xlink:title="csan_PromissoryNotesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_PromissoryNotesMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_PromissoryNotesMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DebenturesMember" xlink:label="csan_DebenturesMember" xlink:title="csan_DebenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_DebenturesMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_DebenturesMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember_1" xlink:title="ifrs-full_BorrowingsByNameMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember_1" xlink:title="Definition : ifrs-full_BorrowingsByNameAxis to ifrs-full_BorrowingsByNameMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BorrowingsByTypeAxis" xlink:label="csan_BorrowingsByTypeAxis" xlink:title="csan_BorrowingsByTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:to="csan_BorrowingsByTypeAxis" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable to csan_BorrowingsByTypeAxis" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BorrowingsByTypeMember" xlink:label="csan_BorrowingsByTypeMember" xlink:title="csan_BorrowingsByTypeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_BorrowingsByTypeAxis" xlink:to="csan_BorrowingsByTypeMember" xlink:title="Definition : csan_BorrowingsByTypeAxis to csan_BorrowingsByTypeMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_UnsecuredNonConvertibleMember" xlink:label="csan_UnsecuredNonConvertibleMember" xlink:title="csan_UnsecuredNonConvertibleMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_BorrowingsByTypeMember" xlink:to="csan_UnsecuredNonConvertibleMember" xlink:title="Definition : csan_BorrowingsByTypeMember to csan_UnsecuredNonConvertibleMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BorrowingsByTypeMember" xlink:label="csan_BorrowingsByTypeMember_1" xlink:title="csan_BorrowingsByTypeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_BorrowingsByTypeAxis" xlink:to="csan_BorrowingsByTypeMember_1" xlink:title="Definition : csan_BorrowingsByTypeAxis to csan_BorrowingsByTypeMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasMember" xlink:label="csan_ComgasMember" xlink:title="csan_ComgasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ComgasMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ComgasMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoSAMember" xlink:label="csan_RumoSAMember" xlink:title="csan_RumoSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoSAMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompassGasEEnergiaSAMember" xlink:label="csan_CompassGasEEnergiaSAMember" xlink:title="csan_CompassGasEEnergiaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CompassGasEEnergiaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CompassGasEEnergiaSAMember" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_JointVenturesAxis" xlink:label="ifrs-full_JointVenturesAxis" xlink:title="ifrs-full_JointVenturesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:to="ifrs-full_JointVenturesAxis" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable to ifrs-full_JointVenturesAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember" xlink:title="ifrs-full_EntitysTotalForJointVenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember" xlink:title="Definition : ifrs-full_JointVenturesAxis to ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenGroupMember" xlink:label="csan_RaizenGroupMember" xlink:title="csan_RaizenGroupMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForJointVenturesMember" xlink:to="csan_RaizenGroupMember" xlink:title="Definition : ifrs-full_EntitysTotalForJointVenturesMember to csan_RaizenGroupMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember_1" xlink:title="ifrs-full_EntitysTotalForJointVenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember_1" xlink:title="Definition : ifrs-full_JointVenturesAxis to ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis" xlink:label="ifrs-full_ClassesOfShareCapitalAxis" xlink:title="ifrs-full_ClassesOfShareCapitalAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:to="ifrs-full_ClassesOfShareCapitalAxis" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable to ifrs-full_ClassesOfShareCapitalAxis" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember" xlink:title="ifrs-full_ClassesOfShareCapitalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalAxis to ifrs-full_ClassesOfShareCapitalMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OrdinarySharesMember" xlink:label="ifrs-full_OrdinarySharesMember" xlink:title="ifrs-full_OrdinarySharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="ifrs-full_OrdinarySharesMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalMember to ifrs-full_OrdinarySharesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PreferenceSharesMember" xlink:label="ifrs-full_PreferenceSharesMember" xlink:title="ifrs-full_PreferenceSharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="ifrs-full_PreferenceSharesMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalMember to ifrs-full_PreferenceSharesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RedeemableSharesMember" xlink:label="csan_RedeemableSharesMember" xlink:title="csan_RedeemableSharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="csan_RedeemableSharesMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalMember to csan_RedeemableSharesMember" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember_1" xlink:title="ifrs-full_ClassesOfShareCapitalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember_1" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalAxis to ifrs-full_ClassesOfShareCapitalMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:title="ifrs-full_BusinessCombinationsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable to ifrs-full_BusinessCombinationsAxis" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:title="ifrs-full_EntitysTotalForBusinessCombinationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:title="Definition : ifrs-full_BusinessCombinationsAxis to ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BiosevSAMember" xlink:label="csan_BiosevSAMember" xlink:title="csan_BiosevSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="csan_BiosevSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForBusinessCombinationsMember to csan_BiosevSAMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember_1" xlink:title="ifrs-full_EntitysTotalForBusinessCombinationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember_1" xlink:title="Definition : ifrs-full_BusinessCombinationsAxis to ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" xlink:title="ifrs-full_RangeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:to="ifrs-full_RangeAxis" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable to ifrs-full_RangeAxis" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="ifrs-full_TopOfRangeMember" xlink:title="ifrs-full_TopOfRangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_TopOfRangeMember" xlink:title="Definition : ifrs-full_RangesMember to ifrs-full_TopOfRangeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember_1" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember_1" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:title="dei_LegalEntityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:to="dei_LegalEntityAxis" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable to dei_LegalEntityAxis" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAMember" xlink:label="csan_CosanSAMember" xlink:title="csan_CosanSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_CosanSAMember" xlink:title="Definition : dei_EntityDomain to csan_CosanSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain_1" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain_1" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StockSplitConversionRatio" xlink:label="csan_StockSplitConversionRatio" xlink:title="csan_StockSplitConversionRatio"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="csan_StockSplitConversionRatio" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems to csan_StockSplitConversionRatio" xlink:type="arc" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfSharesAvailableForStockSplit" xlink:label="csan_NumberOfSharesAvailableForStockSplit" xlink:title="csan_NumberOfSharesAvailableForStockSplit"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="csan_NumberOfSharesAvailableForStockSplit" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems to csan_NumberOfSharesAvailableForStockSplit" xlink:type="arc" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfSharesOutstandingAfterStockSplit" xlink:label="csan_NumberOfSharesOutstandingAfterStockSplit" xlink:title="csan_NumberOfSharesOutstandingAfterStockSplit"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="csan_NumberOfSharesOutstandingAfterStockSplit" xlink:title="Definition : ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems to csan_NumberOfSharesOutstandingAfterStockSplit" xlink:type="arc" order="11" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/NewStandardsAndInterpretationsNotYetEffectiveAdditionalInformationDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems" xlink:label="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems" xlink:title="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable" xlink:label="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable" xlink:title="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems" xlink:to="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable" xlink:title="Definition : ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems to ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_JointVenturesAxis" xlink:label="ifrs-full_JointVenturesAxis" xlink:title="ifrs-full_JointVenturesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable" xlink:to="ifrs-full_JointVenturesAxis" xlink:title="Definition : ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable to ifrs-full_JointVenturesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember" xlink:title="ifrs-full_EntitysTotalForJointVenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember" xlink:title="Definition : ifrs-full_JointVenturesAxis to ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAMember" xlink:label="csan_CosanSAMember" xlink:title="csan_CosanSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForJointVenturesMember" xlink:to="csan_CosanSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForJointVenturesMember to csan_CosanSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember_1" xlink:title="ifrs-full_EntitysTotalForJointVenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember_1" xlink:title="Definition : ifrs-full_JointVenturesAxis to ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" xlink:title="ifrs-full_RangeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable" xlink:to="ifrs-full_RangeAxis" xlink:title="Definition : ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable to ifrs-full_RangeAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember_1" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember_1" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:title="dei_LegalEntityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable" xlink:to="dei_LegalEntityAxis" xlink:title="Definition : ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable to dei_LegalEntityAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLogisticaSAMember" xlink:label="csan_CosanLogisticaSAMember" xlink:title="csan_CosanLogisticaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_CosanLogisticaSAMember" xlink:title="Definition : dei_EntityDomain to csan_CosanLogisticaSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain_1" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain_1" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsAxis" xlink:label="ifrs-full_ClassesOfAssetsAxis" xlink:title="ifrs-full_ClassesOfAssetsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable" xlink:to="ifrs-full_ClassesOfAssetsAxis" xlink:title="Definition : ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable to ifrs-full_ClassesOfAssetsAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember" xlink:title="ifrs-full_ClassesOfAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsAxis to ifrs-full_ClassesOfAssetsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RailroadNetworkMember" xlink:label="csan_RailroadNetworkMember" xlink:title="csan_RailroadNetworkMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="csan_RailroadNetworkMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsMember to csan_RailroadNetworkMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember_1" xlink:title="ifrs-full_ClassesOfAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember_1" xlink:title="Definition : ifrs-full_ClassesOfAssetsAxis to ifrs-full_ClassesOfAssetsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:label="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:title="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable" xlink:to="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:title="Definition : ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable to ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:label="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:title="ifrs-full_IntangibleAssetsAndGoodwillMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:to="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:title="Definition : ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis to ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:label="ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:title="ifrs-full_IntangibleAssetsOtherThanGoodwillMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:title="Definition : ifrs-full_IntangibleAssetsAndGoodwillMember to ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:label="ifrs-full_IntangibleAssetsAndGoodwillMember_1" xlink:title="ifrs-full_IntangibleAssetsAndGoodwillMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:to="ifrs-full_IntangibleAssetsAndGoodwillMember_1" xlink:title="Definition : ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis to ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DescriptionOfAverageMeasurementMultiples" xlink:label="csan_DescriptionOfAverageMeasurementMultiples" xlink:title="csan_DescriptionOfAverageMeasurementMultiples"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems" xlink:to="csan_DescriptionOfAverageMeasurementMultiples" xlink:title="Definition : ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems to csan_DescriptionOfAverageMeasurementMultiples" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Goodwill" xlink:label="ifrs-full_Goodwill" xlink:title="ifrs-full_Goodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems" xlink:to="ifrs-full_Goodwill" xlink:title="Definition : ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems to ifrs-full_Goodwill" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LeaseTerm" xlink:label="csan_LeaseTerm" xlink:title="csan_LeaseTerm"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems" xlink:to="csan_LeaseTerm" xlink:title="Definition : ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems to csan_LeaseTerm" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfCashPaymentInAuction" xlink:label="csan_PercentageOfCashPaymentInAuction" xlink:title="csan_PercentageOfCashPaymentInAuction"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems" xlink:to="csan_PercentageOfCashPaymentInAuction" xlink:title="Definition : ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems to csan_PercentageOfCashPaymentInAuction" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PaymentsForAuction" xlink:label="csan_PaymentsForAuction" xlink:title="csan_PaymentsForAuction"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems" xlink:to="csan_PaymentsForAuction" xlink:title="Definition : ifrs-full_DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems to csan_PaymentsForAuction" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ConcessionspayableSummaryofleasesandgrantsrelatedtoconcessionpayableDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:label="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:title="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LeasesRelatedToConcessionPayable" xlink:label="csan_LeasesRelatedToConcessionPayable" xlink:title="csan_LeasesRelatedToConcessionPayable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_LeasesRelatedToConcessionPayable" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_LeasesRelatedToConcessionPayable" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GrantsRelatedToConcessionPayable" xlink:label="csan_GrantsRelatedToConcessionPayable" xlink:title="csan_GrantsRelatedToConcessionPayable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_GrantsRelatedToConcessionPayable" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_GrantsRelatedToConcessionPayable" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LeasesAndGrantsRelatedToConcessionPayable" xlink:label="csan_LeasesAndGrantsRelatedToConcessionPayable" xlink:title="csan_LeasesAndGrantsRelatedToConcessionPayable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_LeasesAndGrantsRelatedToConcessionPayable" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_LeasesAndGrantsRelatedToConcessionPayable" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CurrentLeasesAndGrantsRelatedToConcessionPayable" xlink:label="csan_CurrentLeasesAndGrantsRelatedToConcessionPayable" xlink:title="csan_CurrentLeasesAndGrantsRelatedToConcessionPayable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_CurrentLeasesAndGrantsRelatedToConcessionPayable" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_CurrentLeasesAndGrantsRelatedToConcessionPayable" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NonCurrentLeasesAndGrantsRelatedToConcessionPayable" xlink:label="csan_NonCurrentLeasesAndGrantsRelatedToConcessionPayable" xlink:title="csan_NonCurrentLeasesAndGrantsRelatedToConcessionPayable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_NonCurrentLeasesAndGrantsRelatedToConcessionPayable" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_NonCurrentLeasesAndGrantsRelatedToConcessionPayable" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfInstallmentsForConcessionAgreement" xlink:label="csan_NumberOfInstallmentsForConcessionAgreement" xlink:title="csan_NumberOfInstallmentsForConcessionAgreement"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_NumberOfInstallmentsForConcessionAgreement" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_NumberOfInstallmentsForConcessionAgreement" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_InstallmentsAmountFallingDueOfGrantsConcessionPayable" xlink:label="csan_InstallmentsAmountFallingDueOfGrantsConcessionPayable" xlink:title="csan_InstallmentsAmountFallingDueOfGrantsConcessionPayable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_InstallmentsAmountFallingDueOfGrantsConcessionPayable" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_InstallmentsAmountFallingDueOfGrantsConcessionPayable" xlink:type="arc" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable" xlink:label="csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable" xlink:title="csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems" xlink:to="csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsLineItems to csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable" xlink:type="arc" use="optional" order="7" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfLiabilitiesAxis" xlink:label="ifrs-full_ClassesOfLiabilitiesAxis" xlink:title="ifrs-full_ClassesOfLiabilitiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable" xlink:to="ifrs-full_ClassesOfLiabilitiesAxis" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable to ifrs-full_ClassesOfLiabilitiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilitiesMember" xlink:label="ifrs-full_LiabilitiesMember" xlink:title="ifrs-full_LiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfLiabilitiesAxis" xlink:to="ifrs-full_LiabilitiesMember" xlink:title="Definition : ifrs-full_ClassesOfLiabilitiesAxis to ifrs-full_LiabilitiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LeaseLiabilitiesMember" xlink:label="ifrs-full_LeaseLiabilitiesMember" xlink:title="ifrs-full_LeaseLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesMember" xlink:to="ifrs-full_LeaseLiabilitiesMember" xlink:title="Definition : ifrs-full_LiabilitiesMember to ifrs-full_LeaseLiabilitiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GrantsPayableMember" xlink:label="csan_GrantsPayableMember" xlink:title="csan_GrantsPayableMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_LiabilitiesMember" xlink:to="csan_GrantsPayableMember" xlink:title="Definition : ifrs-full_LiabilitiesMember to csan_GrantsPayableMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_LiabilitiesMember" xlink:label="ifrs-full_LiabilitiesMember_1" xlink:title="ifrs-full_LiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfLiabilitiesAxis" xlink:to="ifrs-full_LiabilitiesMember_1" xlink:title="Definition : ifrs-full_ClassesOfLiabilitiesAxis to ifrs-full_LiabilitiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : csan_DisclosureOfConcessionsPayableAndJudicialDepositsTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMalhaSulSAMember" xlink:label="csan_RumoMalhaSulSAMember" xlink:title="csan_RumoMalhaSulSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMalhaSulSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMalhaSulSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMalhaPaulistaSAMember" xlink:label="csan_RumoMalhaPaulistaSAMember" xlink:title="csan_RumoMalhaPaulistaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMalhaPaulistaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMalhaPaulistaSAMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMalhaOesteSAMember" xlink:label="csan_RumoMalhaOesteSAMember" xlink:title="csan_RumoMalhaOesteSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMalhaOesteSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMalhaOesteSAMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ElevacoesPortuariasSAMember" xlink:label="csan_ElevacoesPortuariasSAMember" xlink:title="csan_ElevacoesPortuariasSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ElevacoesPortuariasSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ElevacoesPortuariasSAMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PortoferLtdaMember" xlink:label="csan_PortoferLtdaMember" xlink:title="csan_PortoferLtdaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_PortoferLtdaMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_PortoferLtdaMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMalhaCentralSAMember" xlink:label="csan_RumoMalhaCentralSAMember" xlink:title="csan_RumoMalhaCentralSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMalhaCentralSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMalhaCentralSAMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/CommitmentsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfDetailedInformationAboutCommitmentsLineItems" xlink:label="csan_DisclosureOfDetailedInformationAboutCommitmentsLineItems" xlink:title="csan_DisclosureOfDetailedInformationAboutCommitmentsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfDetailedInformationAboutCommitmentsTable" xlink:label="csan_DisclosureOfDetailedInformationAboutCommitmentsTable" xlink:title="csan_DisclosureOfDetailedInformationAboutCommitmentsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfDetailedInformationAboutCommitmentsLineItems" xlink:to="csan_DisclosureOfDetailedInformationAboutCommitmentsTable" xlink:title="Definition : csan_DisclosureOfDetailedInformationAboutCommitmentsLineItems to csan_DisclosureOfDetailedInformationAboutCommitmentsTable" xlink:type="arc" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfDetailedInformationAboutCommitmentsTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : csan_DisclosureOfDetailedInformationAboutCommitmentsTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasMember" xlink:label="csan_ComgasMember" xlink:title="csan_ComgasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ComgasMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ComgasMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoSAMember" xlink:label="csan_RumoSAMember" xlink:title="csan_RumoSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoSAMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMalhaPaulistaSAMember" xlink:label="csan_RumoMalhaPaulistaSAMember" xlink:title="csan_RumoMalhaPaulistaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMalhaPaulistaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMalhaPaulistaSAMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMalhaCentralSAMember" xlink:label="csan_RumoMalhaCentralSAMember" xlink:title="csan_RumoMalhaCentralSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMalhaCentralSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMalhaCentralSAMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesAxis" xlink:label="ifrs-full_ProductsAndServicesAxis" xlink:title="ifrs-full_ProductsAndServicesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfDetailedInformationAboutCommitmentsTable" xlink:to="ifrs-full_ProductsAndServicesAxis" xlink:title="Definition : csan_DisclosureOfDetailedInformationAboutCommitmentsTable to ifrs-full_ProductsAndServicesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesMember" xlink:label="ifrs-full_ProductsAndServicesMember" xlink:title="ifrs-full_ProductsAndServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ProductsAndServicesAxis" xlink:to="ifrs-full_ProductsAndServicesMember" xlink:title="Definition : ifrs-full_ProductsAndServicesAxis to ifrs-full_ProductsAndServicesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GasDistributionMember" xlink:label="ifrs-full_GasDistributionMember" xlink:title="ifrs-full_GasDistributionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="ifrs-full_GasDistributionMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to ifrs-full_GasDistributionMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PortElevationMember" xlink:label="csan_PortElevationMember" xlink:title="csan_PortElevationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_PortElevationMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_PortElevationMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" xlink:title="ifrs-full_RangeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfDetailedInformationAboutCommitmentsTable" xlink:to="ifrs-full_RangeAxis" xlink:title="Definition : csan_DisclosureOfDetailedInformationAboutCommitmentsTable to ifrs-full_RangeAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BottomOfRangeMember" xlink:label="ifrs-full_BottomOfRangeMember" xlink:title="ifrs-full_BottomOfRangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_BottomOfRangeMember" xlink:title="Definition : ifrs-full_RangesMember to ifrs-full_BottomOfRangeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="ifrs-full_TopOfRangeMember" xlink:title="ifrs-full_TopOfRangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_TopOfRangeMember" xlink:title="Definition : ifrs-full_RangesMember to ifrs-full_TopOfRangeMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FinancialCommitmentInEstimatedPresentValue" xlink:label="csan_FinancialCommitmentInEstimatedPresentValue" xlink:title="csan_FinancialCommitmentInEstimatedPresentValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDetailedInformationAboutCommitmentsLineItems" xlink:to="csan_FinancialCommitmentInEstimatedPresentValue" xlink:title="Definition : csan_DisclosureOfDetailedInformationAboutCommitmentsLineItems to csan_FinancialCommitmentInEstimatedPresentValue" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EstimatedInvestmentsToBeMadeForSubConcessionContracts" xlink:label="csan_EstimatedInvestmentsToBeMadeForSubConcessionContracts" xlink:title="csan_EstimatedInvestmentsToBeMadeForSubConcessionContracts"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDetailedInformationAboutCommitmentsLineItems" xlink:to="csan_EstimatedInvestmentsToBeMadeForSubConcessionContracts" xlink:title="Definition : csan_DisclosureOfDetailedInformationAboutCommitmentsLineItems to csan_EstimatedInvestmentsToBeMadeForSubConcessionContracts" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ObligationsOfEstimatedInvestmentsForSubConcessionContracts" xlink:label="csan_ObligationsOfEstimatedInvestmentsForSubConcessionContracts" xlink:title="csan_ObligationsOfEstimatedInvestmentsForSubConcessionContracts"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDetailedInformationAboutCommitmentsLineItems" xlink:to="csan_ObligationsOfEstimatedInvestmentsForSubConcessionContracts" xlink:title="Definition : csan_DisclosureOfDetailedInformationAboutCommitmentsLineItems to csan_ObligationsOfEstimatedInvestmentsForSubConcessionContracts" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfPhysicalExecution" xlink:label="csan_PercentageOfPhysicalExecution" xlink:title="csan_PercentageOfPhysicalExecution"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDetailedInformationAboutCommitmentsLineItems" xlink:to="csan_PercentageOfPhysicalExecution" xlink:title="Definition : csan_DisclosureOfDetailedInformationAboutCommitmentsLineItems to csan_PercentageOfPhysicalExecution" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ContractualFixedTerm" xlink:label="csan_ContractualFixedTerm" xlink:title="csan_ContractualFixedTerm"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDetailedInformationAboutCommitmentsLineItems" xlink:to="csan_ContractualFixedTerm" xlink:title="Definition : csan_DisclosureOfDetailedInformationAboutCommitmentsLineItems to csan_ContractualFixedTerm" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_InvestmentsAtCost" xlink:label="csan_InvestmentsAtCost" xlink:title="csan_InvestmentsAtCost"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDetailedInformationAboutCommitmentsLineItems" xlink:to="csan_InvestmentsAtCost" xlink:title="Definition : csan_DisclosureOfDetailedInformationAboutCommitmentsLineItems to csan_InvestmentsAtCost" xlink:type="arc" order="6" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/SectorfinancialassetandliabilitySummaryofchangesinnetsectorfinancialassetliabilityDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfSectorFinancialAssetAndLiabilityLineItems" xlink:label="csan_DisclosureOfSectorFinancialAssetAndLiabilityLineItems" xlink:title="csan_DisclosureOfSectorFinancialAssetAndLiabilityLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract" xlink:label="csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract" xlink:title="csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfSectorFinancialAssetAndLiabilityLineItems" xlink:to="csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract" xlink:title="Definition : csan_DisclosureOfSectorFinancialAssetAndLiabilityLineItems to csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CostOfNaturalGasAndElectricityPurchasedArisingFromRecognitionOfSectorFinancialAssetAndLiability" xlink:label="csan_CostOfNaturalGasAndElectricityPurchasedArisingFromRecognitionOfSectorFinancialAssetAndLiability" xlink:title="csan_CostOfNaturalGasAndElectricityPurchasedArisingFromRecognitionOfSectorFinancialAssetAndLiability"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract" xlink:to="csan_CostOfNaturalGasAndElectricityPurchasedArisingFromRecognitionOfSectorFinancialAssetAndLiability" xlink:title="Definition : csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract to csan_CostOfNaturalGasAndElectricityPurchasedArisingFromRecognitionOfSectorFinancialAssetAndLiability" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CreditsOfTaxesArisingFromRecognitionOfSectorFinancialAssetAndLiability" xlink:label="csan_CreditsOfTaxesArisingFromRecognitionOfSectorFinancialAssetAndLiability" xlink:title="csan_CreditsOfTaxesArisingFromRecognitionOfSectorFinancialAssetAndLiability"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract" xlink:to="csan_CreditsOfTaxesArisingFromRecognitionOfSectorFinancialAssetAndLiability" xlink:title="Definition : csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract to csan_CreditsOfTaxesArisingFromRecognitionOfSectorFinancialAssetAndLiability" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_InterestArisingFromRecognitionOfSectorFinancialAssetAndLiability" xlink:label="csan_InterestArisingFromRecognitionOfSectorFinancialAssetAndLiability" xlink:title="csan_InterestArisingFromRecognitionOfSectorFinancialAssetAndLiability"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract" xlink:to="csan_InterestArisingFromRecognitionOfSectorFinancialAssetAndLiability" xlink:title="Definition : csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract to csan_InterestArisingFromRecognitionOfSectorFinancialAssetAndLiability" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherRevenueArisingFromRecognitionOfSectorFinancialAssetAndLiability" xlink:label="csan_OtherRevenueArisingFromRecognitionOfSectorFinancialAssetAndLiability" xlink:title="csan_OtherRevenueArisingFromRecognitionOfSectorFinancialAssetAndLiability"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract" xlink:to="csan_OtherRevenueArisingFromRecognitionOfSectorFinancialAssetAndLiability" xlink:title="Definition : csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract to csan_OtherRevenueArisingFromRecognitionOfSectorFinancialAssetAndLiability" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SectorFinancialAssetLiability" xlink:label="csan_SectorFinancialAssetLiability" xlink:title="csan_SectorFinancialAssetLiability"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract" xlink:to="csan_SectorFinancialAssetLiability" xlink:title="Definition : csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract to csan_SectorFinancialAssetLiability" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CurrentSectorFinancialAssetLiability" xlink:label="csan_CurrentSectorFinancialAssetLiability" xlink:title="csan_CurrentSectorFinancialAssetLiability"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract" xlink:to="csan_CurrentSectorFinancialAssetLiability" xlink:title="Definition : csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract to csan_CurrentSectorFinancialAssetLiability" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NonCurrentSectorFinancialAssetLiability" xlink:label="csan_NonCurrentSectorFinancialAssetLiability" xlink:title="csan_NonCurrentSectorFinancialAssetLiability"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract" xlink:to="csan_NonCurrentSectorFinancialAssetLiability" xlink:title="Definition : csan_ReconciliationOfChangesInNetSectorFinancialAssetLiabilityAbstract to csan_NonCurrentSectorFinancialAssetLiability" xlink:type="arc" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ClassesOfSectorFinancialAssetLiabilityTable" xlink:label="csan_ClassesOfSectorFinancialAssetLiabilityTable" xlink:title="csan_ClassesOfSectorFinancialAssetLiabilityTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfSectorFinancialAssetAndLiabilityLineItems" xlink:to="csan_ClassesOfSectorFinancialAssetLiabilityTable" xlink:title="Definition : csan_DisclosureOfSectorFinancialAssetAndLiabilityLineItems to csan_ClassesOfSectorFinancialAssetLiabilityTable" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ClassesOfSectorFinancialAssetLiabilityAxis" xlink:label="csan_ClassesOfSectorFinancialAssetLiabilityAxis" xlink:title="csan_ClassesOfSectorFinancialAssetLiabilityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_ClassesOfSectorFinancialAssetLiabilityTable" xlink:to="csan_ClassesOfSectorFinancialAssetLiabilityAxis" xlink:title="Definition : csan_ClassesOfSectorFinancialAssetLiabilityTable to csan_ClassesOfSectorFinancialAssetLiabilityAxis" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NetSectorFinancialAssetLiabilityMember" xlink:label="csan_NetSectorFinancialAssetLiabilityMember" xlink:title="csan_NetSectorFinancialAssetLiabilityMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_ClassesOfSectorFinancialAssetLiabilityAxis" xlink:to="csan_NetSectorFinancialAssetLiabilityMember" xlink:title="Definition : csan_ClassesOfSectorFinancialAssetLiabilityAxis to csan_NetSectorFinancialAssetLiabilityMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SectorFinancialAssetsMember" xlink:label="csan_SectorFinancialAssetsMember" xlink:title="csan_SectorFinancialAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_NetSectorFinancialAssetLiabilityMember" xlink:to="csan_SectorFinancialAssetsMember" xlink:title="Definition : csan_NetSectorFinancialAssetLiabilityMember to csan_SectorFinancialAssetsMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SectorFinancialLiabilitiesMember" xlink:label="csan_SectorFinancialLiabilitiesMember" xlink:title="csan_SectorFinancialLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_NetSectorFinancialAssetLiabilityMember" xlink:to="csan_SectorFinancialLiabilitiesMember" xlink:title="Definition : csan_NetSectorFinancialAssetLiabilityMember to csan_SectorFinancialLiabilitiesMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NetSectorFinancialAssetLiabilityMember" xlink:label="csan_NetSectorFinancialAssetLiabilityMember_1" xlink:title="csan_NetSectorFinancialAssetLiabilityMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_ClassesOfSectorFinancialAssetLiabilityAxis" xlink:to="csan_NetSectorFinancialAssetLiabilityMember_1" xlink:title="Definition : csan_ClassesOfSectorFinancialAssetLiabilityAxis to csan_NetSectorFinancialAssetLiabilityMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/PropertyplantandequipmentintangibleassetsgoodwillrightofuseassetsandcontractassetsSummaryofIntangibleAssetsExcludingGoodwillDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:title="ifrs-full_DisclosureOfIntangibleAssetsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:title="ifrs-full_DisclosureOfIntangibleAssetsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsLineItems to ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesAxis" xlink:label="ifrs-full_ProductsAndServicesAxis" xlink:title="ifrs-full_ProductsAndServicesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:to="ifrs-full_ProductsAndServicesAxis" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsTable to ifrs-full_ProductsAndServicesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesMember" xlink:label="ifrs-full_ProductsAndServicesMember" xlink:title="ifrs-full_ProductsAndServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ProductsAndServicesAxis" xlink:to="ifrs-full_ProductsAndServicesMember" xlink:title="Definition : ifrs-full_ProductsAndServicesAxis to ifrs-full_ProductsAndServicesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MobilMember" xlink:label="csan_MobilMember" xlink:title="csan_MobilMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_MobilMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_MobilMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CommaMember" xlink:label="csan_CommaMember" xlink:title="csan_CommaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_CommaMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_CommaMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesMember" xlink:label="ifrs-full_ProductsAndServicesMember_1" xlink:title="ifrs-full_ProductsAndServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ProductsAndServicesAxis" xlink:to="ifrs-full_ProductsAndServicesMember_1" xlink:title="Definition : ifrs-full_ProductsAndServicesAxis to ifrs-full_ProductsAndServicesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsAxis" xlink:label="ifrs-full_SegmentsAxis" xlink:title="ifrs-full_SegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:to="ifrs-full_SegmentsAxis" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsTable to ifrs-full_SegmentsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember" xlink:title="ifrs-full_SegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember" xlink:title="Definition : ifrs-full_SegmentsAxis to ifrs-full_SegmentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompanhiaDeGasDeSaoPauloMember" xlink:label="csan_CompanhiaDeGasDeSaoPauloMember" xlink:title="csan_CompanhiaDeGasDeSaoPauloMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_CompanhiaDeGasDeSaoPauloMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_CompanhiaDeGasDeSaoPauloMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ALLMalhaNorteMember" xlink:label="csan_ALLMalhaNorteMember" xlink:title="csan_ALLMalhaNorteMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_ALLMalhaNorteMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_ALLMalhaNorteMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MooveMember" xlink:label="csan_MooveMember" xlink:title="csan_MooveMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_MooveMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_MooveMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember_1" xlink:title="ifrs-full_SegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember_1" xlink:title="Definition : ifrs-full_SegmentsAxis to ifrs-full_SegmentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:label="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:title="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:to="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsTable to ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:label="ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:title="ifrs-full_IntangibleAssetsOtherThanGoodwillMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:to="ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:title="Definition : ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis to ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ServiceConcessionRightsMember" xlink:label="ifrs-full_ServiceConcessionRightsMember" xlink:title="ifrs-full_ServiceConcessionRightsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:to="ifrs-full_ServiceConcessionRightsMember" xlink:title="Definition : ifrs-full_IntangibleAssetsOtherThanGoodwillMember to ifrs-full_ServiceConcessionRightsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ImprovementsToPublicConcessionsAndOperatingLicenseMember" xlink:label="csan_ImprovementsToPublicConcessionsAndOperatingLicenseMember" xlink:title="csan_ImprovementsToPublicConcessionsAndOperatingLicenseMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:to="csan_ImprovementsToPublicConcessionsAndOperatingLicenseMember" xlink:title="Definition : ifrs-full_IntangibleAssetsOtherThanGoodwillMember to csan_ImprovementsToPublicConcessionsAndOperatingLicenseMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BrandNamesMember" xlink:label="ifrs-full_BrandNamesMember" xlink:title="ifrs-full_BrandNamesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:to="ifrs-full_BrandNamesMember" xlink:title="Definition : ifrs-full_IntangibleAssetsOtherThanGoodwillMember to ifrs-full_BrandNamesMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CustomerrelatedIntangibleAssetsMember" xlink:label="ifrs-full_CustomerrelatedIntangibleAssetsMember" xlink:title="ifrs-full_CustomerrelatedIntangibleAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:to="ifrs-full_CustomerrelatedIntangibleAssetsMember" xlink:title="Definition : ifrs-full_IntangibleAssetsOtherThanGoodwillMember to ifrs-full_CustomerrelatedIntangibleAssetsMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ComputerSoftwareMember" xlink:label="ifrs-full_ComputerSoftwareMember" xlink:title="ifrs-full_ComputerSoftwareMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:to="ifrs-full_ComputerSoftwareMember" xlink:title="Definition : ifrs-full_IntangibleAssetsOtherThanGoodwillMember to ifrs-full_ComputerSoftwareMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherMember" xlink:label="csan_OtherMember" xlink:title="csan_OtherMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:to="csan_OtherMember" xlink:title="Definition : ifrs-full_IntangibleAssetsOtherThanGoodwillMember to csan_OtherMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OtherIntangibleAssetsMember" xlink:label="ifrs-full_OtherIntangibleAssetsMember" xlink:title="ifrs-full_OtherIntangibleAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:to="ifrs-full_OtherIntangibleAssetsMember" xlink:title="Definition : ifrs-full_IntangibleAssetsOtherThanGoodwillMember to ifrs-full_OtherIntangibleAssetsMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:label="ifrs-full_IntangibleAssetsOtherThanGoodwillMember_1" xlink:title="ifrs-full_IntangibleAssetsOtherThanGoodwillMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:to="ifrs-full_IntangibleAssetsOtherThanGoodwillMember_1" xlink:title="Definition : ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis to ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfAmortizationRate" xlink:label="csan_PercentageOfAmortizationRate" xlink:title="csan_PercentageOfAmortizationRate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="csan_PercentageOfAmortizationRate" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsLineItems to csan_PercentageOfAmortizationRate" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:label="ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:title="ifrs-full_IntangibleAssetsOtherThanGoodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsLineItems to ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ProvisionforlegalproceedingsandjudicialdepositsContingentassetsAdditionalInformationDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfContingentAssetsLineItems" xlink:label="csan_DisclosureOfContingentAssetsLineItems" xlink:title="csan_DisclosureOfContingentAssetsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ContingentAssetRecognizedForTaxContingencies" xlink:label="csan_ContingentAssetRecognizedForTaxContingencies" xlink:title="csan_ContingentAssetRecognizedForTaxContingencies"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfContingentAssetsLineItems" xlink:to="csan_ContingentAssetRecognizedForTaxContingencies" xlink:title="Definition : csan_DisclosureOfContingentAssetsLineItems to csan_ContingentAssetRecognizedForTaxContingencies" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherRecoverableTaxesRecognized" xlink:label="csan_OtherRecoverableTaxesRecognized" xlink:title="csan_OtherRecoverableTaxesRecognized"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfContingentAssetsLineItems" xlink:to="csan_OtherRecoverableTaxesRecognized" xlink:title="Definition : csan_DisclosureOfContingentAssetsLineItems to csan_OtherRecoverableTaxesRecognized" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherRecoverableTaxesRelatedToOtherIncome" xlink:label="csan_OtherRecoverableTaxesRelatedToOtherIncome" xlink:title="csan_OtherRecoverableTaxesRelatedToOtherIncome"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfContingentAssetsLineItems" xlink:to="csan_OtherRecoverableTaxesRelatedToOtherIncome" xlink:title="Definition : csan_DisclosureOfContingentAssetsLineItems to csan_OtherRecoverableTaxesRelatedToOtherIncome" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherRecoverableTaxesRelatedToFinancialIncome" xlink:label="csan_OtherRecoverableTaxesRelatedToFinancialIncome" xlink:title="csan_OtherRecoverableTaxesRelatedToFinancialIncome"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfContingentAssetsLineItems" xlink:to="csan_OtherRecoverableTaxesRelatedToFinancialIncome" xlink:title="Definition : csan_DisclosureOfContingentAssetsLineItems to csan_OtherRecoverableTaxesRelatedToFinancialIncome" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EstimatedFinancialEffectOfContingentAssets" xlink:label="ifrs-full_EstimatedFinancialEffectOfContingentAssets" xlink:title="ifrs-full_EstimatedFinancialEffectOfContingentAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfContingentAssetsLineItems" xlink:to="ifrs-full_EstimatedFinancialEffectOfContingentAssets" xlink:title="Definition : csan_DisclosureOfContingentAssetsLineItems to ifrs-full_EstimatedFinancialEffectOfContingentAssets" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfContingentAssetsTable" xlink:label="csan_DisclosureOfContingentAssetsTable" xlink:title="csan_DisclosureOfContingentAssetsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfContingentAssetsLineItems" xlink:to="csan_DisclosureOfContingentAssetsTable" xlink:title="Definition : csan_DisclosureOfContingentAssetsLineItems to csan_DisclosureOfContingentAssetsTable" xlink:type="arc" order="5" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ClassesOfContingentAssetsAxis" xlink:label="csan_ClassesOfContingentAssetsAxis" xlink:title="csan_ClassesOfContingentAssetsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfContingentAssetsTable" xlink:to="csan_ClassesOfContingentAssetsAxis" xlink:title="Definition : csan_DisclosureOfContingentAssetsTable to csan_ClassesOfContingentAssetsAxis" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ContingentAssetsMember" xlink:label="csan_ContingentAssetsMember" xlink:title="csan_ContingentAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_ClassesOfContingentAssetsAxis" xlink:to="csan_ContingentAssetsMember" xlink:title="Definition : csan_ClassesOfContingentAssetsAxis to csan_ContingentAssetsMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LegalProceedingsContingentAssetsMember" xlink:label="csan_LegalProceedingsContingentAssetsMember" xlink:title="csan_LegalProceedingsContingentAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_ContingentAssetsMember" xlink:to="csan_LegalProceedingsContingentAssetsMember" xlink:title="Definition : csan_ContingentAssetsMember to csan_LegalProceedingsContingentAssetsMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ContingentAssetsMember" xlink:label="csan_ContingentAssetsMember_1" xlink:title="csan_ContingentAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_ClassesOfContingentAssetsAxis" xlink:to="csan_ContingentAssetsMember_1" xlink:title="Definition : csan_ClassesOfContingentAssetsAxis to csan_ContingentAssetsMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ResolutionTypeAxis" xlink:label="csan_ResolutionTypeAxis" xlink:title="csan_ResolutionTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfContingentAssetsTable" xlink:to="csan_ResolutionTypeAxis" xlink:title="Definition : csan_DisclosureOfContingentAssetsTable to csan_ResolutionTypeAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ResolutiontypeDomain" xlink:label="csan_ResolutiontypeDomain" xlink:title="csan_ResolutiontypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_ResolutionTypeAxis" xlink:to="csan_ResolutiontypeDomain" xlink:title="Definition : csan_ResolutionTypeAxis to csan_ResolutiontypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_Arsesp933ResolutionMember" xlink:label="csan_Arsesp933ResolutionMember" xlink:title="csan_Arsesp933ResolutionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_ResolutiontypeDomain" xlink:to="csan_Arsesp933ResolutionMember" xlink:title="Definition : csan_ResolutiontypeDomain to csan_Arsesp933ResolutionMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ResolutiontypeDomain" xlink:label="csan_ResolutiontypeDomain_1" xlink:title="csan_ResolutiontypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_ResolutionTypeAxis" xlink:to="csan_ResolutiontypeDomain_1" xlink:title="Definition : csan_ResolutionTypeAxis to csan_ResolutiontypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfContingentAssetsTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : csan_DisclosureOfContingentAssetsTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasMember" xlink:label="csan_ComgasMember" xlink:title="csan_ComgasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ComgasMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ComgasMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/PropertyplantandequipmentintangibleassetsgoodwillrightofuseassetsandcontractassetsAdditionalInformationDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:title="ifrs-full_DisclosureOfIntangibleAssetsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingCostsCapitalised" xlink:label="ifrs-full_BorrowingCostsCapitalised" xlink:title="ifrs-full_BorrowingCostsCapitalised"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="ifrs-full_BorrowingCostsCapitalised" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsLineItems to ifrs-full_BorrowingCostsCapitalised" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CapitalisationRateOfBorrowingCostsEligibleForCapitalisation" xlink:label="ifrs-full_CapitalisationRateOfBorrowingCostsEligibleForCapitalisation" xlink:title="ifrs-full_CapitalisationRateOfBorrowingCostsEligibleForCapitalisation"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="ifrs-full_CapitalisationRateOfBorrowingCostsEligibleForCapitalisation" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsLineItems to ifrs-full_CapitalisationRateOfBorrowingCostsEligibleForCapitalisation" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:label="ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:title="ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsLineItems to ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment" xlink:label="ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment" xlink:title="ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsLineItems to ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ImpairmentLossRecognisedInProfitOrLossRightOfUseAssets" xlink:label="csan_ImpairmentLossRecognisedInProfitOrLossRightOfUseAssets" xlink:title="csan_ImpairmentLossRecognisedInProfitOrLossRightOfUseAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="csan_ImpairmentLossRecognisedInProfitOrLossRightOfUseAssets" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsLineItems to csan_ImpairmentLossRecognisedInProfitOrLossRightOfUseAssets" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AssumptionPeriodForCashGeneratingUnit" xlink:label="csan_AssumptionPeriodForCashGeneratingUnit" xlink:title="csan_AssumptionPeriodForCashGeneratingUnit"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="csan_AssumptionPeriodForCashGeneratingUnit" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsLineItems to csan_AssumptionPeriodForCashGeneratingUnit" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_WeightedAverageCostOfCapitalBeforeTaxesPercentage" xlink:label="csan_WeightedAverageCostOfCapitalBeforeTaxesPercentage" xlink:title="csan_WeightedAverageCostOfCapitalBeforeTaxesPercentage"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ImpairmentTestsRecoverableValue" xlink:label="csan_ImpairmentTestsRecoverableValue" xlink:title="csan_ImpairmentTestsRecoverableValue"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BookValueOfPropertyPlantAndEquipmentAndIntangibleAssetsAndRightOfUseAssets" xlink:label="csan_BookValueOfPropertyPlantAndEquipmentAndIntangibleAssetsAndRightOfUseAssets" xlink:title="csan_BookValueOfPropertyPlantAndEquipmentAndIntangibleAssetsAndRightOfUseAssets"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections" xlink:label="ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections" xlink:title="ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections"/> |
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| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GrowthRateBasisUsedToExtrapolateCashFlowProjections" xlink:label="csan_GrowthRateBasisUsedToExtrapolateCashFlowProjections" xlink:title="csan_GrowthRateBasisUsedToExtrapolateCashFlowProjections"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="csan_GrowthRateBasisUsedToExtrapolateCashFlowProjections" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsLineItems to csan_GrowthRateBasisUsedToExtrapolateCashFlowProjections" xlink:type="arc" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AdjustmentToGrowthRateBasisUsedToExtrapolateCashFlowProjections" xlink:label="csan_AdjustmentToGrowthRateBasisUsedToExtrapolateCashFlowProjections" xlink:title="csan_AdjustmentToGrowthRateBasisUsedToExtrapolateCashFlowProjections"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ImpairmentLoss" xlink:label="ifrs-full_ImpairmentLoss" xlink:title="ifrs-full_ImpairmentLoss"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="ifrs-full_ImpairmentLoss" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsLineItems to ifrs-full_ImpairmentLoss" xlink:type="arc" use="optional" order="12" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BookValueOfPropertyPlantAndEquipmentAndIntangibleAssets" xlink:label="csan_BookValueOfPropertyPlantAndEquipmentAndIntangibleAssets" xlink:title="csan_BookValueOfPropertyPlantAndEquipmentAndIntangibleAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="csan_BookValueOfPropertyPlantAndEquipmentAndIntangibleAssets" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsLineItems to csan_BookValueOfPropertyPlantAndEquipmentAndIntangibleAssets" xlink:type="arc" use="optional" order="13" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:title="ifrs-full_DisclosureOfIntangibleAssetsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsLineItems to ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:type="arc" use="optional" order="14" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:label="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:title="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:to="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsTable to ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:label="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:title="ifrs-full_IntangibleAssetsAndGoodwillMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:to="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:title="Definition : ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis to ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:label="ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:title="ifrs-full_IntangibleAssetsOtherThanGoodwillMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:title="Definition : ifrs-full_IntangibleAssetsAndGoodwillMember to ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:label="ifrs-full_IntangibleAssetsAndGoodwillMember_1" xlink:title="ifrs-full_IntangibleAssetsAndGoodwillMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:to="ifrs-full_IntangibleAssetsAndGoodwillMember_1" xlink:title="Definition : ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis to ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLogsticaSAMember" xlink:label="csan_CosanLogsticaSAMember" xlink:title="csan_CosanLogsticaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanLogsticaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanLogsticaSAMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAMember" xlink:label="csan_CosanSAMember" xlink:title="csan_CosanSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanSAMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsAxis" xlink:label="ifrs-full_SegmentsAxis" xlink:title="ifrs-full_SegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:to="ifrs-full_SegmentsAxis" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsTable to ifrs-full_SegmentsAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember" xlink:title="ifrs-full_SegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember" xlink:title="Definition : ifrs-full_SegmentsAxis to ifrs-full_SegmentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MooveMember" xlink:label="csan_MooveMember" xlink:title="csan_MooveMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_MooveMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_MooveMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember_1" xlink:title="ifrs-full_SegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember_1" xlink:title="Definition : ifrs-full_SegmentsAxis to ifrs-full_SegmentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:label="ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:title="ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:to="ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsTable to ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:label="ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:title="ifrs-full_EntitysTotalForCashgeneratingUnitsMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesMember" xlink:label="ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesMember" xlink:title="ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForCashgeneratingUnitsMember" xlink:label="ifrs-full_EntitysTotalForCashgeneratingUnitsMember_1" xlink:title="ifrs-full_EntitysTotalForCashgeneratingUnitsMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:title="ifrs-full_GeographicalAreasAxis"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:title="ifrs-full_GeographicalAreasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:title="Definition : ifrs-full_GeographicalAreasAxis to ifrs-full_GeographicalAreasMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_BR" xlink:label="country_BR" xlink:title="country_BR"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_BR" xlink:title="Definition : ifrs-full_GeographicalAreasMember to country_BR" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_GB" xlink:label="country_GB" xlink:title="country_GB"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_GB" xlink:title="Definition : ifrs-full_GeographicalAreasMember to country_GB" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember_1" xlink:title="ifrs-full_GeographicalAreasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember_1" xlink:title="Definition : ifrs-full_GeographicalAreasAxis to ifrs-full_GeographicalAreasMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DescriptionOfAgreementOfIntangibleAssets" xlink:label="csan_DescriptionOfAgreementOfIntangibleAssets" xlink:title="csan_DescriptionOfAgreementOfIntangibleAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="csan_DescriptionOfAgreementOfIntangibleAssets" xlink:title="Definition : ifrs-full_DisclosureOfIntangibleAssetsLineItems to csan_DescriptionOfAgreementOfIntangibleAssets" xlink:type="arc" order="15" xbrldt:closed="false"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CondensedFinancialStatementsCaptionsLineItems" xlink:label="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:title="srt_CondensedFinancialStatementsCaptionsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NetCurrentAssetsLiabilitiesAbstract" xlink:label="ifrs-full_NetCurrentAssetsLiabilitiesAbstract" xlink:title="ifrs-full_NetCurrentAssetsLiabilitiesAbstract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="ifrs-full_NetCurrentAssetsLiabilitiesAbstract" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to ifrs-full_NetCurrentAssetsLiabilitiesAbstract" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentAssets" xlink:label="ifrs-full_CurrentAssets" xlink:title="ifrs-full_CurrentAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NetCurrentAssetsLiabilitiesAbstract" xlink:to="ifrs-full_CurrentAssets" xlink:title="Definition : ifrs-full_NetCurrentAssetsLiabilitiesAbstract to ifrs-full_CurrentAssets" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentAssetsLiabilities" xlink:label="ifrs-full_CurrentAssetsLiabilities" xlink:title="ifrs-full_CurrentAssetsLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NetCurrentAssetsLiabilitiesAbstract" xlink:to="ifrs-full_CurrentAssetsLiabilities" xlink:title="Definition : ifrs-full_NetCurrentAssetsLiabilitiesAbstract to ifrs-full_CurrentAssetsLiabilities" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentLiabilities" xlink:label="ifrs-full_CurrentLiabilities" xlink:title="ifrs-full_CurrentLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NetCurrentAssetsLiabilitiesAbstract" xlink:to="ifrs-full_CurrentLiabilities" xlink:title="Definition : ifrs-full_NetCurrentAssetsLiabilitiesAbstract to ifrs-full_CurrentLiabilities" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NetNonCurrentAssetsLiabilitiesAbstract" xlink:label="csan_NetNonCurrentAssetsLiabilitiesAbstract" xlink:title="csan_NetNonCurrentAssetsLiabilitiesAbstract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="csan_NetNonCurrentAssetsLiabilitiesAbstract" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to csan_NetNonCurrentAssetsLiabilitiesAbstract" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Equity" xlink:label="ifrs-full_Equity" xlink:title="ifrs-full_Equity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_NetNonCurrentAssetsLiabilitiesAbstract" xlink:to="ifrs-full_Equity" xlink:title="Definition : csan_NetNonCurrentAssetsLiabilitiesAbstract to ifrs-full_Equity" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentAssets" xlink:label="ifrs-full_NoncurrentAssets" xlink:title="ifrs-full_NoncurrentAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_NetNonCurrentAssetsLiabilitiesAbstract" xlink:to="ifrs-full_NoncurrentAssets" xlink:title="Definition : csan_NetNonCurrentAssetsLiabilitiesAbstract to ifrs-full_NoncurrentAssets" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NoncurrentAssetsLiabilities" xlink:label="csan_NoncurrentAssetsLiabilities" xlink:title="csan_NoncurrentAssetsLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_NetNonCurrentAssetsLiabilitiesAbstract" xlink:to="csan_NoncurrentAssetsLiabilities" xlink:title="Definition : csan_NetNonCurrentAssetsLiabilitiesAbstract to csan_NoncurrentAssetsLiabilities" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NoncurrentLiabilities" xlink:label="ifrs-full_NoncurrentLiabilities" xlink:title="ifrs-full_NoncurrentLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_NetNonCurrentAssetsLiabilitiesAbstract" xlink:to="ifrs-full_NoncurrentLiabilities" xlink:title="Definition : csan_NetNonCurrentAssetsLiabilitiesAbstract to ifrs-full_NoncurrentLiabilities" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_StatementOfFinancialStatementsTable" xlink:label="csan_StatementOfFinancialStatementsTable" xlink:title="csan_StatementOfFinancialStatementsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="csan_StatementOfFinancialStatementsTable" xlink:title="Definition : srt_CondensedFinancialStatementsCaptionsLineItems to csan_StatementOfFinancialStatementsTable" xlink:type="arc" use="optional" order="2" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="ifrs-full_CategoriesOfRelatedPartiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_StatementOfFinancialStatementsTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:title="Definition : csan_StatementOfFinancialStatementsTable to ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompanhiaDeGasDeSaoPauloMember" xlink:label="csan_CompanhiaDeGasDeSaoPauloMember" xlink:title="csan_CompanhiaDeGasDeSaoPauloMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_CompanhiaDeGasDeSaoPauloMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_CompanhiaDeGasDeSaoPauloMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLogisticaSAMember" xlink:label="csan_CosanLogisticaSAMember" xlink:title="csan_CosanLogisticaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_CosanLogisticaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_CosanLogisticaSAMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAMember" xlink:label="csan_CosanSAMember" xlink:title="csan_CosanSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_CosanSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_CosanSAMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoSAMember" xlink:label="csan_RumoSAMember" xlink:title="csan_RumoSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_RumoSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_RumoSAMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompassGasEEnergiaSAMember" xlink:label="csan_CompassGasEEnergiaSAMember" xlink:title="csan_CompassGasEEnergiaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_CompassGasEEnergiaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_CompassGasEEnergiaSAMember" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasMember" xlink:label="csan_ComgasMember" xlink:title="csan_ComgasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_ComgasMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_ComgasMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SinlogTecnologiaEmLogisticaSaMember" xlink:label="csan_SinlogTecnologiaEmLogisticaSaMember" xlink:title="csan_SinlogTecnologiaEmLogisticaSaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="csan_SinlogTecnologiaEmLogisticaSaMember" xlink:title="Definition : ifrs-full_EntitysTotalForRelatedPartiesMember to csan_SinlogTecnologiaEmLogisticaSaMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:label="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="ifrs-full_EntitysTotalForRelatedPartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_EntitysTotalForRelatedPartiesMember_1" xlink:title="Definition : ifrs-full_CategoriesOfRelatedPartiesAxis to ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsandLiabilitiesLoansborrowingsanddebenturesAdditionalinformationDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:title="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GuaranteeFeeRate" xlink:label="csan_GuaranteeFeeRate" xlink:title="csan_GuaranteeFeeRate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="csan_GuaranteeFeeRate" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to csan_GuaranteeFeeRate" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BalanceOfBankGuaranteesContracted" xlink:label="csan_BalanceOfBankGuaranteesContracted" xlink:title="csan_BalanceOfBankGuaranteesContracted"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="csan_BalanceOfBankGuaranteesContracted" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to csan_BalanceOfBankGuaranteesContracted" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsInterestRate" xlink:label="ifrs-full_BorrowingsInterestRate" xlink:title="ifrs-full_BorrowingsInterestRate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_BorrowingsInterestRate" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to ifrs-full_BorrowingsInterestRate" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:title="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems to ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:type="arc" use="optional" order="3" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfFinancialLiabilitiesAxis" xlink:label="ifrs-full_TypesOfFinancialLiabilitiesAxis" xlink:title="ifrs-full_TypesOfFinancialLiabilitiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_TypesOfFinancialLiabilitiesAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable to ifrs-full_TypesOfFinancialLiabilitiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialLiabilitiesTypeMember" xlink:label="ifrs-full_FinancialLiabilitiesTypeMember" xlink:title="ifrs-full_FinancialLiabilitiesTypeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_FinancialLiabilitiesTypeMember" xlink:title="Definition : ifrs-full_TypesOfFinancialLiabilitiesAxis to ifrs-full_FinancialLiabilitiesTypeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SecuredBorrowingsMember" xlink:label="csan_SecuredBorrowingsMember" xlink:title="csan_SecuredBorrowingsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialLiabilitiesTypeMember" xlink:to="csan_SecuredBorrowingsMember" xlink:title="Definition : ifrs-full_FinancialLiabilitiesTypeMember to csan_SecuredBorrowingsMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialLiabilitiesTypeMember" xlink:label="ifrs-full_FinancialLiabilitiesTypeMember_1" xlink:title="ifrs-full_FinancialLiabilitiesTypeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_FinancialLiabilitiesTypeMember_1" xlink:title="Definition : ifrs-full_TypesOfFinancialLiabilitiesAxis to ifrs-full_FinancialLiabilitiesTypeMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="ifrs-full_BorrowingsByNameAxis" xlink:title="ifrs-full_BorrowingsByNameAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_BorrowingsByNameAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable to ifrs-full_BorrowingsByNameAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember" xlink:title="ifrs-full_BorrowingsByNameMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember" xlink:title="Definition : ifrs-full_BorrowingsByNameAxis to ifrs-full_BorrowingsByNameMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BrazilianNationalEconomicandSocialDevelopmentBankMember" xlink:label="csan_BrazilianNationalEconomicandSocialDevelopmentBankMember" xlink:title="csan_BrazilianNationalEconomicandSocialDevelopmentBankMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_BrazilianNationalEconomicandSocialDevelopmentBankMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_BrazilianNationalEconomicandSocialDevelopmentBankMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EuropeanInvestmentBankMember" xlink:label="csan_EuropeanInvestmentBankMember" xlink:title="csan_EuropeanInvestmentBankMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_EuropeanInvestmentBankMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_EuropeanInvestmentBankMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember_1" xlink:title="ifrs-full_BorrowingsByNameMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember_1" xlink:title="Definition : ifrs-full_BorrowingsByNameAxis to ifrs-full_BorrowingsByNameMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TypesOfInterestRatesAxis" xlink:label="ifrs-full_TypesOfInterestRatesAxis" xlink:title="ifrs-full_TypesOfInterestRatesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_TypesOfInterestRatesAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable to ifrs-full_TypesOfInterestRatesAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateTypesMember" xlink:label="ifrs-full_InterestRateTypesMember" xlink:title="ifrs-full_InterestRateTypesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_TypesOfInterestRatesAxis" xlink:to="ifrs-full_InterestRateTypesMember" xlink:title="Definition : ifrs-full_TypesOfInterestRatesAxis to ifrs-full_InterestRateTypesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CDIIndexMember" xlink:label="csan_CDIIndexMember" xlink:title="csan_CDIIndexMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_CDIIndexMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_CDIIndexMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TJLPIndexMember" xlink:label="csan_TJLPIndexMember" xlink:title="csan_TJLPIndexMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_InterestRateTypesMember" xlink:to="csan_TJLPIndexMember" xlink:title="Definition : ifrs-full_InterestRateTypesMember to csan_TJLPIndexMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InterestRateTypesMember" xlink:label="ifrs-full_InterestRateTypesMember_1" xlink:title="ifrs-full_InterestRateTypesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_TypesOfInterestRatesAxis" xlink:to="ifrs-full_InterestRateTypesMember_1" xlink:title="Definition : ifrs-full_TypesOfInterestRatesAxis to ifrs-full_InterestRateTypesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" xlink:title="ifrs-full_RangeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_RangeAxis" xlink:title="Definition : ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable to ifrs-full_RangeAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_WeightedAverageMember" xlink:label="ifrs-full_WeightedAverageMember" xlink:title="ifrs-full_WeightedAverageMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_RangesMember" xlink:to="ifrs-full_WeightedAverageMember" xlink:title="Definition : ifrs-full_RangesMember to ifrs-full_WeightedAverageMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_RangesMember" xlink:label="ifrs-full_RangesMember_1" xlink:title="ifrs-full_RangesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangesMember_1" xlink:title="Definition : ifrs-full_RangeAxis to ifrs-full_RangesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/FinancialAssetsAndLiabilitiesSummaryOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems" xlink:label="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems" xlink:title="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CreditDerivativeNominalAmount" xlink:label="ifrs-full_CreditDerivativeNominalAmount" xlink:title="ifrs-full_CreditDerivativeNominalAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems" xlink:to="ifrs-full_CreditDerivativeNominalAmount" xlink:title="Definition : csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems to ifrs-full_CreditDerivativeNominalAmount" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NetCurrencyAndInterestRateInstruments" xlink:label="csan_NetCurrencyAndInterestRateInstruments" xlink:title="csan_NetCurrencyAndInterestRateInstruments"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems" xlink:to="csan_NetCurrencyAndInterestRateInstruments" xlink:title="Definition : csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems to csan_NetCurrencyAndInterestRateInstruments" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NetAccumulatedFairValueAdjustmentOfCurrencyAndInterestRateInstruments" xlink:label="csan_NetAccumulatedFairValueAdjustmentOfCurrencyAndInterestRateInstruments" xlink:title="csan_NetAccumulatedFairValueAdjustmentOfCurrencyAndInterestRateInstruments"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems" xlink:to="csan_NetAccumulatedFairValueAdjustmentOfCurrencyAndInterestRateInstruments" xlink:title="Definition : csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems to csan_NetAccumulatedFairValueAdjustmentOfCurrencyAndInterestRateInstruments" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NotionalAmount" xlink:label="ifrs-full_NotionalAmount" xlink:title="ifrs-full_NotionalAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems" xlink:to="ifrs-full_NotionalAmount" xlink:title="Definition : csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems to ifrs-full_NotionalAmount" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_Borrowings" xlink:label="ifrs-full_Borrowings" xlink:title="ifrs-full_Borrowings"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems" xlink:to="ifrs-full_Borrowings" xlink:title="Definition : csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems to ifrs-full_Borrowings" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AccumulatedFairValueHedgeAdjustmentOfBorrowings" xlink:label="csan_AccumulatedFairValueHedgeAdjustmentOfBorrowings" xlink:title="csan_AccumulatedFairValueHedgeAdjustmentOfBorrowings"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems" xlink:to="csan_AccumulatedFairValueHedgeAdjustmentOfBorrowings" xlink:title="Definition : csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems to csan_AccumulatedFairValueHedgeAdjustmentOfBorrowings" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentAssets" xlink:label="ifrs-full_HedgingInstrumentAssets" xlink:title="ifrs-full_HedgingInstrumentAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems" xlink:to="ifrs-full_HedgingInstrumentAssets" xlink:title="Definition : csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems to ifrs-full_HedgingInstrumentAssets" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DerivativeHedgingInstrumentsAccumulatedFairValueAdjustment" xlink:label="csan_DerivativeHedgingInstrumentsAccumulatedFairValueAdjustment" xlink:title="csan_DerivativeHedgingInstrumentsAccumulatedFairValueAdjustment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems" xlink:to="csan_DerivativeHedgingInstrumentsAccumulatedFairValueAdjustment" xlink:title="Definition : csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems to csan_DerivativeHedgingInstrumentsAccumulatedFairValueAdjustment" xlink:type="arc" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NominalAmountOfHedgingInstrument" xlink:label="ifrs-full_NominalAmountOfHedgingInstrument" xlink:title="ifrs-full_NominalAmountOfHedgingInstrument"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems" xlink:to="ifrs-full_NominalAmountOfHedgingInstrument" xlink:title="Definition : csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems to ifrs-full_NominalAmountOfHedgingInstrument" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsTable" xlink:label="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsTable" xlink:title="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems" xlink:to="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsTable" xlink:title="Definition : csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsLineItems to csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsTable" xlink:type="arc" use="optional" order="9" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_HedgingDesignation1Axis" xlink:label="csan_HedgingDesignation1Axis" xlink:title="csan_HedgingDesignation1Axis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsTable" xlink:to="csan_HedgingDesignation1Axis" xlink:title="Definition : csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsTable to csan_HedgingDesignation1Axis" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_HedgingDesignation1Domain" xlink:label="csan_HedgingDesignation1Domain" xlink:title="csan_HedgingDesignation1Domain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_HedgingDesignation1Axis" xlink:to="csan_HedgingDesignation1Domain" xlink:title="Definition : csan_HedgingDesignation1Axis to csan_HedgingDesignation1Domain" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DesignatedAsHedgingInstrumentsMember" xlink:label="csan_DesignatedAsHedgingInstrumentsMember" xlink:title="csan_DesignatedAsHedgingInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_HedgingDesignation1Domain" xlink:to="csan_DesignatedAsHedgingInstrumentsMember" xlink:title="Definition : csan_HedgingDesignation1Domain to csan_DesignatedAsHedgingInstrumentsMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_HedgingDesignation1Domain" xlink:label="csan_HedgingDesignation1Domain_1" xlink:title="csan_HedgingDesignation1Domain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_HedgingDesignation1Axis" xlink:to="csan_HedgingDesignation1Domain_1" xlink:title="Definition : csan_HedgingDesignation1Axis to csan_HedgingDesignation1Domain" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="ifrs-full_BorrowingsByNameAxis" xlink:title="ifrs-full_BorrowingsByNameAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsTable" xlink:to="ifrs-full_BorrowingsByNameAxis" xlink:title="Definition : csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsTable to ifrs-full_BorrowingsByNameAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember" xlink:title="ifrs-full_BorrowingsByNameMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember" xlink:title="Definition : ifrs-full_BorrowingsByNameAxis to ifrs-full_BorrowingsByNameMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DebenturesThirdIssueThirdSeriesMember" xlink:label="csan_DebenturesThirdIssueThirdSeriesMember" xlink:title="csan_DebenturesThirdIssueThirdSeriesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_DebenturesThirdIssueThirdSeriesMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_DebenturesThirdIssueThirdSeriesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DebenturesFifthIssueSingleSeriesMember" xlink:label="csan_DebenturesFifthIssueSingleSeriesMember" xlink:title="csan_DebenturesFifthIssueSingleSeriesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_DebenturesFifthIssueSingleSeriesMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_DebenturesFifthIssueSingleSeriesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DebenturesMember" xlink:label="csan_DebenturesMember" xlink:title="csan_DebenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_DebenturesMember" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_DebenturesMember" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDue2023Member" xlink:label="csan_SeniorNotesDue2023Member" xlink:title="csan_SeniorNotesDue2023Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDue2023Member" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDue2023Member" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDue2024Member" xlink:label="csan_SeniorNotesDue2024Member" xlink:title="csan_SeniorNotesDue2024Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDue2024Member" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDue2024Member" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorNotesDue2025Member" xlink:label="csan_SeniorNotesDue2025Member" xlink:title="csan_SeniorNotesDue2025Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_BorrowingsByNameMember" xlink:to="csan_SeniorNotesDue2025Member" xlink:title="Definition : ifrs-full_BorrowingsByNameMember to csan_SeniorNotesDue2025Member" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BorrowingsByNameMember" xlink:label="ifrs-full_BorrowingsByNameMember_1" xlink:title="ifrs-full_BorrowingsByNameMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameMember_1" xlink:title="Definition : ifrs-full_BorrowingsByNameAxis to ifrs-full_BorrowingsByNameMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentsAxis" xlink:label="ifrs-full_HedgingInstrumentsAxis" xlink:title="ifrs-full_HedgingInstrumentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsTable" xlink:to="ifrs-full_HedgingInstrumentsAxis" xlink:title="Definition : csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsTable to ifrs-full_HedgingInstrumentsAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentsMember" xlink:label="ifrs-full_HedgingInstrumentsMember" xlink:title="ifrs-full_HedgingInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_HedgingInstrumentsAxis" xlink:to="ifrs-full_HedgingInstrumentsMember" xlink:title="Definition : ifrs-full_HedgingInstrumentsAxis to ifrs-full_HedgingInstrumentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DebenturesThirdIssueThirdSeriesMember" xlink:label="csan_DebenturesThirdIssueThirdSeriesMember_1" xlink:title="csan_DebenturesThirdIssueThirdSeriesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="csan_DebenturesThirdIssueThirdSeriesMember_1" xlink:title="Definition : ifrs-full_HedgingInstrumentsMember to csan_DebenturesThirdIssueThirdSeriesMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DebenturesFifthIssueSingleSeriesMember" xlink:label="csan_DebenturesFifthIssueSingleSeriesMember_1" xlink:title="csan_DebenturesFifthIssueSingleSeriesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="csan_DebenturesFifthIssueSingleSeriesMember_1" xlink:title="Definition : ifrs-full_HedgingInstrumentsMember to csan_DebenturesFifthIssueSingleSeriesMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="csan_DebenturesMember" xlink:title="Definition : ifrs-full_HedgingInstrumentsMember to csan_DebenturesMember" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorSwapsNotesDue2023Member" xlink:label="csan_SeniorSwapsNotesDue2023Member" xlink:title="csan_SeniorSwapsNotesDue2023Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="csan_SeniorSwapsNotesDue2023Member" xlink:title="Definition : ifrs-full_HedgingInstrumentsMember to csan_SeniorSwapsNotesDue2023Member" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorSwapsNotesDue2024Member" xlink:label="csan_SeniorSwapsNotesDue2024Member" xlink:title="csan_SeniorSwapsNotesDue2024Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="csan_SeniorSwapsNotesDue2024Member" xlink:title="Definition : ifrs-full_HedgingInstrumentsMember to csan_SeniorSwapsNotesDue2024Member" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SeniorSwapsNotesDue2025Member" xlink:label="csan_SeniorSwapsNotesDue2025Member" xlink:title="csan_SeniorSwapsNotesDue2025Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_HedgingInstrumentsMember" xlink:to="csan_SeniorSwapsNotesDue2025Member" xlink:title="Definition : ifrs-full_HedgingInstrumentsMember to csan_SeniorSwapsNotesDue2025Member" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_HedgingInstrumentsMember" xlink:label="ifrs-full_HedgingInstrumentsMember_1" xlink:title="ifrs-full_HedgingInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_HedgingInstrumentsAxis" xlink:to="ifrs-full_HedgingInstrumentsMember_1" xlink:title="Definition : ifrs-full_HedgingInstrumentsAxis to ifrs-full_HedgingInstrumentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasMember" xlink:label="csan_ComgasMember" xlink:title="csan_ComgasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ComgasMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ComgasMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoSAMember" xlink:label="csan_RumoSAMember" xlink:title="csan_RumoSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoSAMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:title="dei_LegalEntityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsTable" xlink:to="dei_LegalEntityAxis" xlink:title="Definition : csan_DisclosureOfForeignCurrencyRelatedHedgingInstrumentsAndInterestRateSwapsTable to dei_LegalEntityAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAMember" xlink:label="csan_CosanSAMember" xlink:title="csan_CosanSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_CosanSAMember" xlink:title="Definition : dei_EntityDomain to csan_CosanSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLimitedMember" xlink:label="csan_CosanLimitedMember" xlink:title="csan_CosanLimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_CosanLimitedMember" xlink:title="Definition : dei_EntityDomain to csan_CosanLimitedMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain_1" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain_1" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/DevelopmentoftheCompanyAdditionalInformationDetail"> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:label="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:title="csan_DisclosureOfDevelopmentOfCompanyLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred" xlink:label="ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred" xlink:title="ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IssueOfEquity" xlink:label="ifrs-full_IssueOfEquity" xlink:title="ifrs-full_IssueOfEquity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="ifrs-full_IssueOfEquity" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to ifrs-full_IssueOfEquity" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfIssuanceOfNewCommonSharesForInvestmentAgreement" xlink:label="csan_PercentageOfIssuanceOfNewCommonSharesForInvestmentAgreement" xlink:title="csan_PercentageOfIssuanceOfNewCommonSharesForInvestmentAgreement"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_PercentageOfIssuanceOfNewCommonSharesForInvestmentAgreement" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_PercentageOfIssuanceOfNewCommonSharesForInvestmentAgreement" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProceedsFromIssueOfOrdinaryShares" xlink:label="ifrs-full_ProceedsFromIssueOfOrdinaryShares" xlink:title="ifrs-full_ProceedsFromIssueOfOrdinaryShares"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="ifrs-full_ProceedsFromIssueOfOrdinaryShares" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to ifrs-full_ProceedsFromIssueOfOrdinaryShares" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ContractualTerm" xlink:label="csan_ContractualTerm" xlink:title="csan_ContractualTerm"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_ContractualTerm" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_ContractualTerm" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ContractualBidAmount" xlink:label="csan_ContractualBidAmount" xlink:title="csan_ContractualBidAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_ContractualBidAmount" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_ContractualBidAmount" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ContractualBidAmountAdjustedWithContratualParameters" xlink:label="csan_ContractualBidAmountAdjustedWithContratualParameters" xlink:title="csan_ContractualBidAmountAdjustedWithContratualParameters"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_ContractualBidAmountAdjustedWithContratualParameters" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_ContractualBidAmountAdjustedWithContratualParameters" xlink:type="arc" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfCashPaymentInAuction" xlink:label="csan_PercentageOfCashPaymentInAuction" xlink:title="csan_PercentageOfCashPaymentInAuction"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_PercentageOfCashPaymentInAuction" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_PercentageOfCashPaymentInAuction" xlink:type="arc" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PeriodOfCashPaymentToBeMadeInAuction" xlink:label="csan_PeriodOfCashPaymentToBeMadeInAuction" xlink:title="csan_PeriodOfCashPaymentToBeMadeInAuction"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_PeriodOfCashPaymentToBeMadeInAuction" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_PeriodOfCashPaymentToBeMadeInAuction" xlink:type="arc" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfQuarterlyInstallmentsCalculatedPursuantToTheTermsOfTheConcessionAgreement" xlink:label="csan_NumberOfQuarterlyInstallmentsCalculatedPursuantToTheTermsOfTheConcessionAgreement" xlink:title="csan_NumberOfQuarterlyInstallmentsCalculatedPursuantToTheTermsOfTheConcessionAgreement"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_NumberOfQuarterlyInstallmentsCalculatedPursuantToTheTermsOfTheConcessionAgreement" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_NumberOfQuarterlyInstallmentsCalculatedPursuantToTheTermsOfTheConcessionAgreement" xlink:type="arc" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PaymentsForAuction" xlink:label="csan_PaymentsForAuction" xlink:title="csan_PaymentsForAuction"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_PaymentsForAuction" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_PaymentsForAuction" xlink:type="arc" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_InvestmentsInJointVentures" xlink:label="ifrs-full_InvestmentsInJointVentures" xlink:title="ifrs-full_InvestmentsInJointVentures"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="ifrs-full_InvestmentsInJointVentures" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to ifrs-full_InvestmentsInJointVentures" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GainLossFromFormationOfJointVenture" xlink:label="csan_GainLossFromFormationOfJointVenture" xlink:title="csan_GainLossFromFormationOfJointVenture"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_GainLossFromFormationOfJointVenture" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_GainLossFromFormationOfJointVenture" xlink:type="arc" order="12" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:label="ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:title="ifrs-full_ProportionOfOwnershipInterestInJointVenture"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to ifrs-full_ProportionOfOwnershipInterestInJointVenture" xlink:type="arc" use="optional" order="13" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates" xlink:label="ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates" xlink:title="ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates" xlink:type="arc" use="optional" order="14" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:label="ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:title="ifrs-full_ProportionOfOwnershipInterestInSubsidiary"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:type="arc" use="optional" order="15" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_IncreaseDecreaseThroughOtherDistributionsToOwners" xlink:label="ifrs-full_IncreaseDecreaseThroughOtherDistributionsToOwners" xlink:title="ifrs-full_IncreaseDecreaseThroughOtherDistributionsToOwners"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughOtherDistributionsToOwners" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to ifrs-full_IncreaseDecreaseThroughOtherDistributionsToOwners" xlink:type="arc" use="optional" order="16" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MaximumAggregateAmountOfDerivativesWhichMayBeNegotiatedPursuantToAgreement" xlink:label="csan_MaximumAggregateAmountOfDerivativesWhichMayBeNegotiatedPursuantToAgreement" xlink:title="csan_MaximumAggregateAmountOfDerivativesWhichMayBeNegotiatedPursuantToAgreement"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_MaximumAggregateAmountOfDerivativesWhichMayBeNegotiatedPursuantToAgreement" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_MaximumAggregateAmountOfDerivativesWhichMayBeNegotiatedPursuantToAgreement" xlink:type="arc" order="17" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MaximumAggregateNumberOfUnderlyingSharesPursuantToAgreement" xlink:label="csan_MaximumAggregateNumberOfUnderlyingSharesPursuantToAgreement" xlink:title="csan_MaximumAggregateNumberOfUnderlyingSharesPursuantToAgreement"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_MaximumAggregateNumberOfUnderlyingSharesPursuantToAgreement" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_MaximumAggregateNumberOfUnderlyingSharesPursuantToAgreement" xlink:type="arc" order="18" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NewGrantAmountForSubConcessionContracts" xlink:label="csan_NewGrantAmountForSubConcessionContracts" xlink:title="csan_NewGrantAmountForSubConcessionContracts"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_NewGrantAmountForSubConcessionContracts" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_NewGrantAmountForSubConcessionContracts" xlink:type="arc" order="19" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_EstimatedInvestmentsToBeMadeForSubConcessionContracts" xlink:label="csan_EstimatedInvestmentsToBeMadeForSubConcessionContracts" xlink:title="csan_EstimatedInvestmentsToBeMadeForSubConcessionContracts"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_EstimatedInvestmentsToBeMadeForSubConcessionContracts" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_EstimatedInvestmentsToBeMadeForSubConcessionContracts" xlink:type="arc" order="20" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProceedsFromIssuingShares" xlink:label="ifrs-full_ProceedsFromIssuingShares" xlink:title="ifrs-full_ProceedsFromIssuingShares"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="ifrs-full_ProceedsFromIssuingShares" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to ifrs-full_ProceedsFromIssuingShares" xlink:type="arc" use="optional" order="21" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfSharesIssued" xlink:label="ifrs-full_NumberOfSharesIssued" xlink:title="ifrs-full_NumberOfSharesIssued"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="ifrs-full_NumberOfSharesIssued" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to ifrs-full_NumberOfSharesIssued" xlink:type="arc" use="optional" order="22" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ShareIssuePrice" xlink:label="csan_ShareIssuePrice" xlink:title="csan_ShareIssuePrice"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_ShareIssuePrice" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_ShareIssuePrice" xlink:type="arc" order="23" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfDecreasedConsumption" xlink:label="csan_PercentageOfDecreasedConsumption" xlink:title="csan_PercentageOfDecreasedConsumption"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_PercentageOfDecreasedConsumption" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_PercentageOfDecreasedConsumption" xlink:type="arc" order="24" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfDecreasedDemand" xlink:label="csan_PercentageOfDecreasedDemand" xlink:title="csan_PercentageOfDecreasedDemand"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_PercentageOfDecreasedDemand" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_PercentageOfDecreasedDemand" xlink:type="arc" order="25" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfDecreasedSales" xlink:label="csan_PercentageOfDecreasedSales" xlink:title="csan_PercentageOfDecreasedSales"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_PercentageOfDecreasedSales" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_PercentageOfDecreasedSales" xlink:type="arc" order="26" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_VolumeTransportedPerKilometer" xlink:label="csan_VolumeTransportedPerKilometer" xlink:title="csan_VolumeTransportedPerKilometer"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_VolumeTransportedPerKilometer" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_VolumeTransportedPerKilometer" xlink:type="arc" order="27" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfIncreasedVolumeTransported" xlink:label="csan_PercentageOfIncreasedVolumeTransported" xlink:title="csan_PercentageOfIncreasedVolumeTransported"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_PercentageOfIncreasedVolumeTransported" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_PercentageOfIncreasedVolumeTransported" xlink:type="arc" order="28" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfDecreasedVolumeTransported" xlink:label="csan_PercentageOfDecreasedVolumeTransported" xlink:title="csan_PercentageOfDecreasedVolumeTransported"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_PercentageOfDecreasedVolumeTransported" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_PercentageOfDecreasedVolumeTransported" xlink:type="arc" order="29" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfDecreasedDemandForTransportationOfGrains" xlink:label="csan_PercentageOfDecreasedDemandForTransportationOfGrains" xlink:title="csan_PercentageOfDecreasedDemandForTransportationOfGrains"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_PercentageOfDecreasedDemandForTransportationOfGrains" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_PercentageOfDecreasedDemandForTransportationOfGrains" xlink:type="arc" order="30" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfDecreasedDemandForNaturalGas" xlink:label="csan_PercentageOfDecreasedDemandForNaturalGas" xlink:title="csan_PercentageOfDecreasedDemandForNaturalGas"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_PercentageOfDecreasedDemandForNaturalGas" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_PercentageOfDecreasedDemandForNaturalGas" xlink:type="arc" order="31" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfIncreasedDemandForNaturalGas" xlink:label="csan_PercentageOfIncreasedDemandForNaturalGas" xlink:title="csan_PercentageOfIncreasedDemandForNaturalGas"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_PercentageOfIncreasedDemandForNaturalGas" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_PercentageOfIncreasedDemandForNaturalGas" xlink:type="arc" order="32" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfIncreasedVolumeSold" xlink:label="csan_PercentageOfIncreasedVolumeSold" xlink:title="csan_PercentageOfIncreasedVolumeSold"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_PercentageOfIncreasedVolumeSold" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_PercentageOfIncreasedVolumeSold" xlink:type="arc" order="33" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProfitLoss" xlink:label="ifrs-full_ProfitLoss" xlink:title="ifrs-full_ProfitLoss"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="ifrs-full_ProfitLoss" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to ifrs-full_ProfitLoss" xlink:type="arc" use="optional" order="34" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CashAndCashEquivalentsAndMarketableSecurities" xlink:label="csan_CashAndCashEquivalentsAndMarketableSecurities" xlink:title="csan_CashAndCashEquivalentsAndMarketableSecurities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_CashAndCashEquivalentsAndMarketableSecurities" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_CashAndCashEquivalentsAndMarketableSecurities" xlink:type="arc" order="35" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:label="ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:title="ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:type="arc" use="optional" order="36" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ProceedsFromFinancingFacilitiesContractedByJointVentures" xlink:label="csan_ProceedsFromFinancingFacilitiesContractedByJointVentures" xlink:title="csan_ProceedsFromFinancingFacilitiesContractedByJointVentures"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_ProceedsFromFinancingFacilitiesContractedByJointVentures" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_ProceedsFromFinancingFacilitiesContractedByJointVentures" xlink:type="arc" order="37" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LeverageRatio" xlink:label="csan_LeverageRatio" xlink:title="csan_LeverageRatio"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_LeverageRatio" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_LeverageRatio" xlink:type="arc" order="38" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DisclosureOfBackgroundAndOperationsTable" xlink:label="csan_DisclosureOfBackgroundAndOperationsTable" xlink:title="csan_DisclosureOfBackgroundAndOperationsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_DisclosureOfBackgroundAndOperationsTable" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_DisclosureOfBackgroundAndOperationsTable" xlink:type="arc" use="optional" order="39" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:title="dei_LegalEntityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="dei_LegalEntityAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to dei_LegalEntityAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanSAMember" xlink:label="csan_CosanSAMember" xlink:title="csan_CosanSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="csan_CosanSAMember" xlink:title="Definition : dei_EntityDomain to csan_CosanSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain_1" xlink:title="dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain_1" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenCombustiveisSAMember" xlink:label="csan_RaizenCombustiveisSAMember" xlink:title="csan_RaizenCombustiveisSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RaizenCombustiveisSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RaizenCombustiveisSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CosanLubesInvestmentsLimitedMember" xlink:label="csan_CosanLubesInvestmentsLimitedMember" xlink:title="csan_CosanLubesInvestmentsLimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_CosanLubesInvestmentsLimitedMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_CosanLubesInvestmentsLimitedMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoSAMember" xlink:label="csan_RumoSAMember" xlink:title="csan_RumoSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoSAMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ComgasMember" xlink:label="csan_ComgasMember" xlink:title="csan_ComgasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_ComgasMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_ComgasMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RumoMalhaPaulistaSAMember" xlink:label="csan_RumoMalhaPaulistaSAMember" xlink:title="csan_RumoMalhaPaulistaSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForSubsidiariesMember" xlink:to="csan_RumoMalhaPaulistaSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForSubsidiariesMember to csan_RumoMalhaPaulistaSAMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForSubsidiariesMember" xlink:label="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="ifrs-full_EntitysTotalForSubsidiariesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_EntitysTotalForSubsidiariesMember_1" xlink:title="Definition : ifrs-full_SignificantInvestmentsInSubsidiariesAxis to ifrs-full_EntitysTotalForSubsidiariesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:title="ifrs-full_BusinessCombinationsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to ifrs-full_BusinessCombinationsAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:title="ifrs-full_EntitysTotalForBusinessCombinationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:title="Definition : ifrs-full_BusinessCombinationsAxis to ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenArgentinaMember" xlink:label="csan_RaizenArgentinaMember" xlink:title="csan_RaizenArgentinaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="csan_RaizenArgentinaMember" xlink:title="Definition : ifrs-full_EntitysTotalForBusinessCombinationsMember to csan_RaizenArgentinaMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember_1" xlink:title="ifrs-full_EntitysTotalForBusinessCombinationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember_1" xlink:title="Definition : ifrs-full_BusinessCombinationsAxis to ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:label="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:title="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsMember" xlink:label="ifrs-full_NonadjustingEventsMember" xlink:title="ifrs-full_NonadjustingEventsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsMember" xlink:title="Definition : ifrs-full_NonadjustingEventsAfterReportingPeriodAxis to ifrs-full_NonadjustingEventsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_MajorOrdinaryShareTransactionsMember" xlink:label="ifrs-full_MajorOrdinaryShareTransactionsMember" xlink:title="ifrs-full_MajorOrdinaryShareTransactionsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_NonadjustingEventsMember" xlink:to="ifrs-full_MajorOrdinaryShareTransactionsMember" xlink:title="Definition : ifrs-full_NonadjustingEventsMember to ifrs-full_MajorOrdinaryShareTransactionsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NonadjustingEventsMember" xlink:label="ifrs-full_NonadjustingEventsMember_1" xlink:title="ifrs-full_NonadjustingEventsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsMember_1" xlink:title="Definition : ifrs-full_NonadjustingEventsAfterReportingPeriodAxis to ifrs-full_NonadjustingEventsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsAxis" xlink:label="ifrs-full_ClassesOfAssetsAxis" xlink:title="ifrs-full_ClassesOfAssetsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="ifrs-full_ClassesOfAssetsAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to ifrs-full_ClassesOfAssetsAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember" xlink:title="ifrs-full_ClassesOfAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsAxis to ifrs-full_ClassesOfAssetsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RailroadNetworkMember" xlink:label="csan_RailroadNetworkMember" xlink:title="csan_RailroadNetworkMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfAssetsMember" xlink:to="csan_RailroadNetworkMember" xlink:title="Definition : ifrs-full_ClassesOfAssetsMember to csan_RailroadNetworkMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfAssetsMember" xlink:label="ifrs-full_ClassesOfAssetsMember_1" xlink:title="ifrs-full_ClassesOfAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsMember_1" xlink:title="Definition : ifrs-full_ClassesOfAssetsAxis to ifrs-full_ClassesOfAssetsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_JointVenturesAxis" xlink:label="ifrs-full_JointVenturesAxis" xlink:title="ifrs-full_JointVenturesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="ifrs-full_JointVenturesAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to ifrs-full_JointVenturesAxis" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember" xlink:title="ifrs-full_EntitysTotalForJointVenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember" xlink:title="Definition : ifrs-full_JointVenturesAxis to ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RedeIntegradaDeLojasDeConvenenciasEProximidadeSAMember" xlink:label="csan_RedeIntegradaDeLojasDeConvenenciasEProximidadeSAMember" xlink:title="csan_RedeIntegradaDeLojasDeConvenenciasEProximidadeSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForJointVenturesMember" xlink:to="csan_RedeIntegradaDeLojasDeConvenenciasEProximidadeSAMember" xlink:title="Definition : ifrs-full_EntitysTotalForJointVenturesMember to csan_RedeIntegradaDeLojasDeConvenenciasEProximidadeSAMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForJointVenturesMember" xlink:label="ifrs-full_EntitysTotalForJointVenturesMember_1" xlink:title="ifrs-full_EntitysTotalForJointVenturesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_JointVenturesAxis" xlink:to="ifrs-full_EntitysTotalForJointVenturesMember_1" xlink:title="Definition : ifrs-full_JointVenturesAxis to ifrs-full_EntitysTotalForJointVenturesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis" xlink:label="ifrs-full_ClassesOfShareCapitalAxis" xlink:title="ifrs-full_ClassesOfShareCapitalAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="ifrs-full_ClassesOfShareCapitalAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to ifrs-full_ClassesOfShareCapitalAxis" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember" xlink:title="ifrs-full_ClassesOfShareCapitalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalAxis to ifrs-full_ClassesOfShareCapitalMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_OrdinarySharesMember" xlink:label="ifrs-full_OrdinarySharesMember" xlink:title="ifrs-full_OrdinarySharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="ifrs-full_OrdinarySharesMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalMember to ifrs-full_OrdinarySharesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PreferenceSharesMember" xlink:label="ifrs-full_PreferenceSharesMember" xlink:title="ifrs-full_PreferenceSharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="ifrs-full_PreferenceSharesMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalMember to ifrs-full_PreferenceSharesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember_1" xlink:title="ifrs-full_ClassesOfShareCapitalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember_1" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalAxis to ifrs-full_ClassesOfShareCapitalMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesAxis" xlink:label="ifrs-full_CounterpartiesAxis" xlink:title="ifrs-full_CounterpartiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="ifrs-full_CounterpartiesAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to ifrs-full_CounterpartiesAxis" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember" xlink:title="ifrs-full_CounterpartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember" xlink:title="Definition : ifrs-full_CounterpartiesAxis to ifrs-full_CounterpartiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BancoSantanderBrasilSAMember" xlink:label="csan_BancoSantanderBrasilSAMember" xlink:title="csan_BancoSantanderBrasilSAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_CounterpartiesMember" xlink:to="csan_BancoSantanderBrasilSAMember" xlink:title="Definition : ifrs-full_CounterpartiesMember to csan_BancoSantanderBrasilSAMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CounterpartiesMember" xlink:label="ifrs-full_CounterpartiesMember_1" xlink:title="ifrs-full_CounterpartiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesMember_1" xlink:title="Definition : ifrs-full_CounterpartiesAxis to ifrs-full_CounterpartiesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsAxis" xlink:label="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:title="ifrs-full_ClassesOfFinancialAssetsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to ifrs-full_ClassesOfFinancialAssetsAxis" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsMember" xlink:label="ifrs-full_FinancialAssetsMember" xlink:title="ifrs-full_FinancialAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsMember" xlink:title="Definition : ifrs-full_ClassesOfFinancialAssetsAxis to ifrs-full_FinancialAssetsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SwapContractForSharesMember" xlink:label="csan_SwapContractForSharesMember" xlink:title="csan_SwapContractForSharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_FinancialAssetsMember" xlink:to="csan_SwapContractForSharesMember" xlink:title="Definition : ifrs-full_FinancialAssetsMember to csan_SwapContractForSharesMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_FinancialAssetsMember" xlink:label="ifrs-full_FinancialAssetsMember_1" xlink:title="ifrs-full_FinancialAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:to="ifrs-full_FinancialAssetsMember_1" xlink:title="Definition : ifrs-full_ClassesOfFinancialAssetsAxis to ifrs-full_FinancialAssetsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_UnusualOrInfrequentItemsAxis" xlink:label="csan_UnusualOrInfrequentItemsAxis" xlink:title="csan_UnusualOrInfrequentItemsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="csan_UnusualOrInfrequentItemsAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to csan_UnusualOrInfrequentItemsAxis" xlink:type="arc" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_UnusualOrInfrequentItemsDomain" xlink:label="csan_UnusualOrInfrequentItemsDomain" xlink:title="csan_UnusualOrInfrequentItemsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_UnusualOrInfrequentItemsAxis" xlink:to="csan_UnusualOrInfrequentItemsDomain" xlink:title="Definition : csan_UnusualOrInfrequentItemsAxis to csan_UnusualOrInfrequentItemsDomain" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CovidNineteenMember" xlink:label="csan_CovidNineteenMember" xlink:title="csan_CovidNineteenMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_UnusualOrInfrequentItemsDomain" xlink:to="csan_CovidNineteenMember" xlink:title="Definition : csan_UnusualOrInfrequentItemsDomain to csan_CovidNineteenMember" xlink:type="arc" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_UnusualOrInfrequentItemsDomain" xlink:label="csan_UnusualOrInfrequentItemsDomain_1" xlink:title="csan_UnusualOrInfrequentItemsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_UnusualOrInfrequentItemsAxis" xlink:to="csan_UnusualOrInfrequentItemsDomain_1" xlink:title="Definition : csan_UnusualOrInfrequentItemsAxis to csan_UnusualOrInfrequentItemsDomain" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsAxis" xlink:label="ifrs-full_SegmentsAxis" xlink:title="ifrs-full_SegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="ifrs-full_SegmentsAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to ifrs-full_SegmentsAxis" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember" xlink:title="ifrs-full_SegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember" xlink:title="Definition : ifrs-full_SegmentsAxis to ifrs-full_SegmentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RaizenCombustiveisMember" xlink:label="csan_RaizenCombustiveisMember" xlink:title="csan_RaizenCombustiveisMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_RaizenCombustiveisMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_RaizenCombustiveisMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_LogisticsMember" xlink:label="csan_LogisticsMember" xlink:title="csan_LogisticsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_LogisticsMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_LogisticsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GasAndEnergyMember" xlink:label="csan_GasAndEnergyMember" xlink:title="csan_GasAndEnergyMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_GasAndEnergyMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_GasAndEnergyMember" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MooveMember" xlink:label="csan_MooveMember" xlink:title="csan_MooveMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_SegmentsMember" xlink:to="csan_MooveMember" xlink:title="Definition : ifrs-full_SegmentsMember to csan_MooveMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_SegmentsMember" xlink:label="ifrs-full_SegmentsMember_1" xlink:title="ifrs-full_SegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_SegmentsAxis" xlink:to="ifrs-full_SegmentsMember_1" xlink:title="Definition : ifrs-full_SegmentsAxis to ifrs-full_SegmentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesAxis" xlink:label="ifrs-full_ProductsAndServicesAxis" xlink:title="ifrs-full_ProductsAndServicesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="ifrs-full_ProductsAndServicesAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to ifrs-full_ProductsAndServicesAxis" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesMember" xlink:label="ifrs-full_ProductsAndServicesMember" xlink:title="ifrs-full_ProductsAndServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ProductsAndServicesAxis" xlink:to="ifrs-full_ProductsAndServicesMember" xlink:title="Definition : ifrs-full_ProductsAndServicesAxis to ifrs-full_ProductsAndServicesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_FuelsMember" xlink:label="csan_FuelsMember" xlink:title="csan_FuelsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_FuelsMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_FuelsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_GasolineAndEthanolMember" xlink:label="csan_GasolineAndEthanolMember" xlink:title="csan_GasolineAndEthanolMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_GasolineAndEthanolMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_GasolineAndEthanolMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AviationFuelsMember" xlink:label="csan_AviationFuelsMember" xlink:title="csan_AviationFuelsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_AviationFuelsMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_AviationFuelsMember" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_IndustrialSegmentMember" xlink:label="csan_IndustrialSegmentMember" xlink:title="csan_IndustrialSegmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_IndustrialSegmentMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_IndustrialSegmentMember" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CommercialSegmentMember" xlink:label="csan_CommercialSegmentMember" xlink:title="csan_CommercialSegmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_CommercialSegmentMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_CommercialSegmentMember" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ResidentialSegmentMember" xlink:label="csan_ResidentialSegmentMember" xlink:title="csan_ResidentialSegmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ProductsAndServicesMember" xlink:to="csan_ResidentialSegmentMember" xlink:title="Definition : ifrs-full_ProductsAndServicesMember to csan_ResidentialSegmentMember" xlink:type="arc" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ProductsAndServicesMember" xlink:label="ifrs-full_ProductsAndServicesMember_1" xlink:title="ifrs-full_ProductsAndServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ProductsAndServicesAxis" xlink:to="ifrs-full_ProductsAndServicesMember_1" xlink:title="Definition : ifrs-full_ProductsAndServicesAxis to ifrs-full_ProductsAndServicesMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" xlink:title="ifrs-full_GeographicalAreasAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="csan_DisclosureOfBackgroundAndOperationsTable" xlink:to="ifrs-full_GeographicalAreasAxis" xlink:title="Definition : csan_DisclosureOfBackgroundAndOperationsTable to ifrs-full_GeographicalAreasAxis" xlink:type="arc" use="optional" order="12" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember" xlink:title="ifrs-full_GeographicalAreasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember" xlink:title="Definition : ifrs-full_GeographicalAreasAxis to ifrs-full_GeographicalAreasMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_BR" xlink:label="country_BR" xlink:title="country_BR"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_BR" xlink:title="Definition : ifrs-full_GeographicalAreasMember to country_BR" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_AR" xlink:label="country_AR" xlink:title="country_AR"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_GeographicalAreasMember" xlink:to="country_AR" xlink:title="Definition : ifrs-full_GeographicalAreasMember to country_AR" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_GeographicalAreasMember" xlink:label="ifrs-full_GeographicalAreasMember_1" xlink:title="ifrs-full_GeographicalAreasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasMember_1" xlink:title="Definition : ifrs-full_GeographicalAreasAxis to ifrs-full_GeographicalAreasMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_RepaymentOfGrantsForSubConcessionContracts" xlink:label="csan_RepaymentOfGrantsForSubConcessionContracts" xlink:title="csan_RepaymentOfGrantsForSubConcessionContracts"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="csan_RepaymentOfGrantsForSubConcessionContracts" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to csan_RepaymentOfGrantsForSubConcessionContracts" xlink:type="arc" order="40" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CurrentAssetsLiabilities" xlink:label="ifrs-full_CurrentAssetsLiabilities" xlink:title="ifrs-full_CurrentAssetsLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="csan_DisclosureOfDevelopmentOfCompanyLineItems" xlink:to="ifrs-full_CurrentAssetsLiabilities" xlink:title="Definition : csan_DisclosureOfDevelopmentOfCompanyLineItems to ifrs-full_CurrentAssetsLiabilities" xlink:type="arc" use="optional" order="41" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/ShareholdersEquityAdditionalInformationDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:label="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:title="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:label="ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:title="ifrs-full_DisclosureOfClassesOfShareCapitalTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis" xlink:label="ifrs-full_ClassesOfShareCapitalAxis" xlink:title="ifrs-full_ClassesOfShareCapitalAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:to="ifrs-full_ClassesOfShareCapitalAxis" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalTable to ifrs-full_ClassesOfShareCapitalAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember" xlink:title="ifrs-full_ClassesOfShareCapitalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalAxis to ifrs-full_ClassesOfShareCapitalMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ClassATreasurySharesMember" xlink:label="csan_ClassATreasurySharesMember" xlink:title="csan_ClassATreasurySharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="csan_ClassATreasurySharesMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalMember to csan_ClassATreasurySharesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ClassBSeriesOneCommonMember" xlink:label="csan_ClassBSeriesOneCommonMember" xlink:title="csan_ClassBSeriesOneCommonMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="csan_ClassBSeriesOneCommonMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalMember to csan_ClassBSeriesOneCommonMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ClassACommonSharesMember" xlink:label="csan_ClassACommonSharesMember" xlink:title="csan_ClassACommonSharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="csan_ClassACommonSharesMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalMember to csan_ClassACommonSharesMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_ClassBCommonSharesMember" xlink:label="csan_ClassBCommonSharesMember" xlink:title="csan_ClassBCommonSharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_ClassesOfShareCapitalMember" xlink:to="csan_ClassBCommonSharesMember" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalMember to csan_ClassBCommonSharesMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ClassesOfShareCapitalMember" xlink:label="ifrs-full_ClassesOfShareCapitalMember_1" xlink:title="ifrs-full_ClassesOfShareCapitalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ClassesOfShareCapitalAxis" xlink:to="ifrs-full_ClassesOfShareCapitalMember_1" xlink:title="Definition : ifrs-full_ClassesOfShareCapitalAxis to ifrs-full_ClassesOfShareCapitalMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PlanName1Axis" xlink:label="csan_PlanName1Axis" xlink:title="csan_PlanName1Axis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:to="csan_PlanName1Axis" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalTable to csan_PlanName1Axis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PlanName1Domain" xlink:label="csan_PlanName1Domain" xlink:title="csan_PlanName1Domain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="csan_PlanName1Axis" xlink:to="csan_PlanName1Domain" xlink:title="Definition : csan_PlanName1Axis to csan_PlanName1Domain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PlanName1Domain" xlink:label="csan_PlanName1Domain_1" xlink:title="csan_PlanName1Domain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="csan_PlanName1Axis" xlink:to="csan_PlanName1Domain_1" xlink:title="Definition : csan_PlanName1Axis to csan_PlanName1Domain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ComponentsOfEquityAxis" xlink:label="ifrs-full_ComponentsOfEquityAxis" xlink:title="ifrs-full_ComponentsOfEquityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:to="ifrs-full_ComponentsOfEquityAxis" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalTable to ifrs-full_ComponentsOfEquityAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EquityMember" xlink:label="ifrs-full_EquityMember" xlink:title="ifrs-full_EquityMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ComponentsOfEquityAxis" xlink:to="ifrs-full_EquityMember" xlink:title="Definition : ifrs-full_ComponentsOfEquityAxis to ifrs-full_EquityMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_TreasurySharesMember" xlink:label="ifrs-full_TreasurySharesMember" xlink:title="ifrs-full_TreasurySharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_TreasurySharesMember" xlink:title="Definition : ifrs-full_EquityMember to ifrs-full_TreasurySharesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EquityMember" xlink:label="ifrs-full_EquityMember_1" xlink:title="ifrs-full_EquityMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_ComponentsOfEquityAxis" xlink:to="ifrs-full_EquityMember_1" xlink:title="Definition : ifrs-full_ComponentsOfEquityAxis to ifrs-full_EquityMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfSharesIssuedDuringPeriodForShareBasedCompensationPlans" xlink:label="csan_NumberOfSharesIssuedDuringPeriodForShareBasedCompensationPlans" xlink:title="csan_NumberOfSharesIssuedDuringPeriodForShareBasedCompensationPlans"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="csan_NumberOfSharesIssuedDuringPeriodForShareBasedCompensationPlans" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to csan_NumberOfSharesIssuedDuringPeriodForShareBasedCompensationPlans" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfSharesIssuedDuringPeriodForOtherThanShareBasedCompensationPlans" xlink:label="csan_NumberOfSharesIssuedDuringPeriodForOtherThanShareBasedCompensationPlans" xlink:title="csan_NumberOfSharesIssuedDuringPeriodForOtherThanShareBasedCompensationPlans"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="csan_NumberOfSharesIssuedDuringPeriodForOtherThanShareBasedCompensationPlans" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to csan_NumberOfSharesIssuedDuringPeriodForOtherThanShareBasedCompensationPlans" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DividendPayables" xlink:label="ifrs-full_DividendPayables" xlink:title="ifrs-full_DividendPayables"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="ifrs-full_DividendPayables" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to ifrs-full_DividendPayables" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_AmountOfSharesAuthorised" xlink:label="csan_AmountOfSharesAuthorised" xlink:title="csan_AmountOfSharesAuthorised"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="csan_AmountOfSharesAuthorised" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to csan_AmountOfSharesAuthorised" xlink:type="arc" use="optional" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfSharesAuthorised" xlink:label="ifrs-full_NumberOfSharesAuthorised" xlink:title="ifrs-full_NumberOfSharesAuthorised"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="ifrs-full_NumberOfSharesAuthorised" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to ifrs-full_NumberOfSharesAuthorised" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_ParValuePerShare" xlink:label="ifrs-full_ParValuePerShare" xlink:title="ifrs-full_ParValuePerShare"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="ifrs-full_ParValuePerShare" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to ifrs-full_ParValuePerShare" xlink:type="arc" use="optional" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TreasurySharesShares" xlink:label="csan_TreasurySharesShares" xlink:title="csan_TreasurySharesShares"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="csan_TreasurySharesShares" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to csan_TreasurySharesShares" xlink:type="arc" use="optional" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_MarketValuePricePerShare" xlink:label="csan_MarketValuePricePerShare" xlink:title="csan_MarketValuePricePerShare"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="csan_MarketValuePricePerShare" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to csan_MarketValuePricePerShare" xlink:type="arc" use="optional" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_SharePrice1" xlink:label="csan_SharePrice1" xlink:title="csan_SharePrice1"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="csan_SharePrice1" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to csan_SharePrice1" xlink:type="arc" use="optional" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DividendsPaidOrdinarySharesPerShare" xlink:label="ifrs-full_DividendsPaidOrdinarySharesPerShare" xlink:title="ifrs-full_DividendsPaidOrdinarySharesPerShare"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="ifrs-full_DividendsPaidOrdinarySharesPerShare" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to ifrs-full_DividendsPaidOrdinarySharesPerShare" xlink:type="arc" use="optional" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_NumberOfSharesIssued" xlink:label="ifrs-full_NumberOfSharesIssued" xlink:title="ifrs-full_NumberOfSharesIssued"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="ifrs-full_NumberOfSharesIssued" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to ifrs-full_NumberOfSharesIssued" xlink:type="arc" use="optional" order="11" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfSharesRepurchased" xlink:label="csan_NumberOfSharesRepurchased" xlink:title="csan_NumberOfSharesRepurchased"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="csan_NumberOfSharesRepurchased" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to csan_NumberOfSharesRepurchased" xlink:type="arc" use="optional" order="12" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfOwnSharesRepurchased" xlink:label="csan_PercentageOfOwnSharesRepurchased" xlink:title="csan_PercentageOfOwnSharesRepurchased"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="csan_PercentageOfOwnSharesRepurchased" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to csan_PercentageOfOwnSharesRepurchased" xlink:type="arc" use="optional" order="13" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfAdditionalSharesRepurchased" xlink:label="csan_NumberOfAdditionalSharesRepurchased" xlink:title="csan_NumberOfAdditionalSharesRepurchased"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="csan_NumberOfAdditionalSharesRepurchased" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to csan_NumberOfAdditionalSharesRepurchased" xlink:type="arc" use="optional" order="14" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfAdditionalSharesRepurchased" xlink:label="csan_PercentageOfAdditionalSharesRepurchased" xlink:title="csan_PercentageOfAdditionalSharesRepurchased"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="csan_PercentageOfAdditionalSharesRepurchased" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to csan_PercentageOfAdditionalSharesRepurchased" xlink:type="arc" use="optional" order="15" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_NumberOfSharesCancelled" xlink:label="csan_NumberOfSharesCancelled" xlink:title="csan_NumberOfSharesCancelled"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="csan_NumberOfSharesCancelled" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to csan_NumberOfSharesCancelled" xlink:type="arc" use="optional" order="16" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PercentageOfOwnSharesCancelled" xlink:label="csan_PercentageOfOwnSharesCancelled" xlink:title="csan_PercentageOfOwnSharesCancelled"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="csan_PercentageOfOwnSharesCancelled" xlink:title="Definition : ifrs-full_DisclosureOfClassesOfShareCapitalLineItems to csan_PercentageOfOwnSharesCancelled" xlink:type="arc" use="optional" order="17" xbrldt:closed="false"/> |
| | </link:definitionLink> |
| <link:definitionLink xlink:type="extended" xlink:role="http://www.cosan.com/role/InvestmentsinAssociatesAcquisitionofsubsidiariesDetail"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:label="ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:title="ifrs-full_DisclosureOfBusinessCombinationsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_DisclosureOfBusinessCombinationsTable" xlink:label="ifrs-full_DisclosureOfBusinessCombinationsTable" xlink:title="ifrs-full_DisclosureOfBusinessCombinationsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:to="ifrs-full_DisclosureOfBusinessCombinationsTable" xlink:title="Definition : ifrs-full_DisclosureOfBusinessCombinationsLineItems to ifrs-full_DisclosureOfBusinessCombinationsTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="ifrs-full_BusinessCombinationsAxis" xlink:title="ifrs-full_BusinessCombinationsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_DisclosureOfBusinessCombinationsTable" xlink:to="ifrs-full_BusinessCombinationsAxis" xlink:title="Definition : ifrs-full_DisclosureOfBusinessCombinationsTable to ifrs-full_BusinessCombinationsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:title="ifrs-full_EntitysTotalForBusinessCombinationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:title="Definition : ifrs-full_BusinessCombinationsAxis to ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_BusinessCombinationsMember" xlink:label="ifrs-full_BusinessCombinationsMember" xlink:title="ifrs-full_BusinessCombinationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="ifrs-full_BusinessCombinationsMember" xlink:title="Definition : ifrs-full_EntitysTotalForBusinessCombinationsMember to ifrs-full_BusinessCombinationsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompassComercializadoraDeEnergiaLtdaMember" xlink:label="csan_CompassComercializadoraDeEnergiaLtdaMember" xlink:title="csan_CompassComercializadoraDeEnergiaLtdaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="csan_CompassComercializadoraDeEnergiaLtdaMember" xlink:title="Definition : ifrs-full_EntitysTotalForBusinessCombinationsMember to csan_CompassComercializadoraDeEnergiaLtdaMember" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompassGeracaoLtdaMember" xlink:label="csan_CompassGeracaoLtdaMember" xlink:title="csan_CompassGeracaoLtdaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="csan_CompassGeracaoLtdaMember" xlink:title="Definition : ifrs-full_EntitysTotalForBusinessCombinationsMember to csan_CompassGeracaoLtdaMember" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_CompassEnergiaLtdaMember" xlink:label="csan_CompassEnergiaLtdaMember" xlink:title="csan_CompassEnergiaLtdaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="csan_CompassEnergiaLtdaMember" xlink:title="Definition : ifrs-full_EntitysTotalForBusinessCombinationsMember to csan_CompassEnergiaLtdaMember" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_BlackRiverParticipacoesLtdaMember" xlink:label="csan_BlackRiverParticipacoesLtdaMember" xlink:title="csan_BlackRiverParticipacoesLtdaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="csan_BlackRiverParticipacoesLtdaMember" xlink:title="Definition : ifrs-full_EntitysTotalForBusinessCombinationsMember to csan_BlackRiverParticipacoesLtdaMember" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:label="ifrs-full_EntitysTotalForBusinessCombinationsMember_1" xlink:title="ifrs-full_EntitysTotalForBusinessCombinationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ifrs-full_BusinessCombinationsAxis" xlink:to="ifrs-full_EntitysTotalForBusinessCombinationsMember_1" xlink:title="Definition : ifrs-full_BusinessCombinationsAxis to ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:label="ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:title="ifrs-full_PercentageOfVotingEquityInterestsAcquired"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:to="ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:title="Definition : ifrs-full_DisclosureOfBusinessCombinationsLineItems to ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:type="arc" use="optional" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashTransferred" xlink:label="ifrs-full_CashTransferred" xlink:title="ifrs-full_CashTransferred"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:to="ifrs-full_CashTransferred" xlink:title="Definition : ifrs-full_DisclosureOfBusinessCombinationsLineItems to ifrs-full_CashTransferred" xlink:type="arc" use="optional" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract" xlink:label="ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract" xlink:title="ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:to="ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract" xlink:title="Definition : ifrs-full_DisclosureOfBusinessCombinationsLineItems to ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract" xlink:type="arc" use="optional" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate" xlink:label="ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate" xlink:title="ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract" xlink:to="ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate" xlink:title="Definition : ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract to ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate" xlink:type="arc" use="optional" order="0" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TradeReceivablesRecognisedAsOfAcquisitionDate" xlink:label="csan_TradeReceivablesRecognisedAsOfAcquisitionDate" xlink:title="csan_TradeReceivablesRecognisedAsOfAcquisitionDate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract" xlink:to="csan_TradeReceivablesRecognisedAsOfAcquisitionDate" xlink:title="Definition : ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract to csan_TradeReceivablesRecognisedAsOfAcquisitionDate" xlink:type="arc" order="1" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherTaxReceivableRecognisedAsOfAcquisitionDate" xlink:label="csan_OtherTaxReceivableRecognisedAsOfAcquisitionDate" xlink:title="csan_OtherTaxReceivableRecognisedAsOfAcquisitionDate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract" xlink:to="csan_OtherTaxReceivableRecognisedAsOfAcquisitionDate" xlink:title="Definition : ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract to csan_OtherTaxReceivableRecognisedAsOfAcquisitionDate" xlink:type="arc" order="2" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DerivativeFinancialInstrumentsRecognisedAsOfAcquisitionDate" xlink:label="csan_DerivativeFinancialInstrumentsRecognisedAsOfAcquisitionDate" xlink:title="csan_DerivativeFinancialInstrumentsRecognisedAsOfAcquisitionDate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract" xlink:to="csan_DerivativeFinancialInstrumentsRecognisedAsOfAcquisitionDate" xlink:title="Definition : ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract to csan_DerivativeFinancialInstrumentsRecognisedAsOfAcquisitionDate" xlink:type="arc" order="3" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherCurrentAssetsRecognisedAsOfAcquisitionDate" xlink:label="csan_OtherCurrentAssetsRecognisedAsOfAcquisitionDate" xlink:title="csan_OtherCurrentAssetsRecognisedAsOfAcquisitionDate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract" xlink:to="csan_OtherCurrentAssetsRecognisedAsOfAcquisitionDate" xlink:title="Definition : ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract to csan_OtherCurrentAssetsRecognisedAsOfAcquisitionDate" xlink:type="arc" order="4" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2019-03-27/full_ifrs/full_ifrs-cor_2019-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate" xlink:label="ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate" xlink:title="ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract" xlink:to="ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate" xlink:title="Definition : ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract to ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate" xlink:type="arc" use="optional" order="5" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_TradePayablesRecognisedAsOfAcquisitionDate" xlink:label="csan_TradePayablesRecognisedAsOfAcquisitionDate" xlink:title="csan_TradePayablesRecognisedAsOfAcquisitionDate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract" xlink:to="csan_TradePayablesRecognisedAsOfAcquisitionDate" xlink:title="Definition : ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract to csan_TradePayablesRecognisedAsOfAcquisitionDate" xlink:type="arc" order="6" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherTaxesPayableRecognisedAsOfAcquisitionDate" xlink:label="csan_OtherTaxesPayableRecognisedAsOfAcquisitionDate" xlink:title="csan_OtherTaxesPayableRecognisedAsOfAcquisitionDate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract" xlink:to="csan_OtherTaxesPayableRecognisedAsOfAcquisitionDate" xlink:title="Definition : ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract to csan_OtherTaxesPayableRecognisedAsOfAcquisitionDate" xlink:type="arc" order="7" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherLiabilitiesRecognisedAsOfAcquisitionDate" xlink:label="csan_OtherLiabilitiesRecognisedAsOfAcquisitionDate" xlink:title="csan_OtherLiabilitiesRecognisedAsOfAcquisitionDate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract" xlink:to="csan_OtherLiabilitiesRecognisedAsOfAcquisitionDate" xlink:title="Definition : ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract to csan_OtherLiabilitiesRecognisedAsOfAcquisitionDate" xlink:type="arc" order="8" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_OtherFinancialLiabilitiesRecognisedAsOfAcquisitionDate" xlink:label="csan_OtherFinancialLiabilitiesRecognisedAsOfAcquisitionDate" xlink:title="csan_OtherFinancialLiabilitiesRecognisedAsOfAcquisitionDate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract" xlink:to="csan_OtherFinancialLiabilitiesRecognisedAsOfAcquisitionDate" xlink:title="Definition : ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract to csan_OtherFinancialLiabilitiesRecognisedAsOfAcquisitionDate" xlink:type="arc" order="9" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_DividendsPayableRecognisedAsOfAcquisitionDate" xlink:label="csan_DividendsPayableRecognisedAsOfAcquisitionDate" xlink:title="csan_DividendsPayableRecognisedAsOfAcquisitionDate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract" xlink:to="csan_DividendsPayableRecognisedAsOfAcquisitionDate" xlink:title="Definition : ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract to csan_DividendsPayableRecognisedAsOfAcquisitionDate" xlink:type="arc" order="10" xbrldt:closed="false"/> |
| | <link:loc xlink:type="locator" xlink:href="csan-20201231.xsd#csan_PayablesToRelatedPartiesRecognisedAsOfAcquisitionDate" xlink:label="csan_PayablesToRelatedPartiesRecognisedAsOfAcquisitionDate" xlink:title="csan_PayablesToRelatedPartiesRecognisedAsOfAcquisitionDate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract" xlink:to="csan_PayablesToRelatedPartiesRecognisedAsOfAcquisitionDate" xlink:title="Definition : ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract to csan_PayablesToRelatedPartiesRecognisedAsOfAcquisitionDate" xlink:type="arc" order="11" xbrldt:closed="false"/> |
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