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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_242"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_242_default"/> |
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| | <loc xlink:type="locator" xlink:href="genc-20220331.xsd#genc_PartsAndComponentSalesMember" xlink:label="loc_genc_PartsAndComponentSalesMember_247"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_242" xlink:to="loc_genc_PartsAndComponentSalesMember_247" use="optional" order="11"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220331.xsd#genc_EquipmentSalesMember" xlink:label="loc_genc_EquipmentSalesMember_246"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_242" xlink:to="loc_genc_EquipmentSalesMember_246" use="optional" order="12"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220331.xsd#genc_FreightRevenueMember" xlink:label="loc_genc_FreightRevenueMember_248"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_242" xlink:to="loc_genc_FreightRevenueMember_248" use="optional" order="13"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220331.xsd#genc_OtherRevenuesMember" xlink:label="loc_genc_OtherRevenuesMember_249"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_242" xlink:to="loc_genc_OtherRevenuesMember_249" use="optional" order="14"/> |
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| <definitionLink xlink:type="extended" xlink:role="http://www.gencor.com/role/RevenueRecognitionAndRelatedCostsAdditionalInformationDetail"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_256"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220331.xsd#genc_CostsAndEstimatedEarningsInExcessOfBillingsOnUncompletedContractsCurrent" xlink:label="loc_genc_CostsAndEstimatedEarningsInExcessOfBillingsOnUncompletedContractsCurrent_262"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_256" xlink:to="loc_genc_CostsAndEstimatedEarningsInExcessOfBillingsOnUncompletedContractsCurrent_262" use="optional" order="1"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220331.xsd#genc_ExpectedPeriodForContractAssetsBillingAndCollection" xlink:label="loc_genc_ExpectedPeriodForContractAssetsBillingAndCollection_263"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_256" xlink:to="loc_genc_ExpectedPeriodForContractAssetsBillingAndCollection_263" use="optional" order="2"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220331.xsd#genc_IncrementalCostsAmortizationPeriod" xlink:label="loc_genc_IncrementalCostsAmortizationPeriod_261"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_256" xlink:to="loc_genc_IncrementalCostsAmortizationPeriod_261" use="optional" order="3"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220331.xsd#genc_ContractWithCustomerAccountsReceivable" xlink:label="loc_genc_ContractWithCustomerAccountsReceivable_264"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_256" xlink:to="loc_genc_ContractWithCustomerAccountsReceivable_264" use="optional" order="4"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerLiability" xlink:label="loc_us-gaap_ContractWithCustomerLiability_265"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_256" xlink:to="loc_us-gaap_ContractWithCustomerLiability_265" use="optional" order="5"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_257"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_256" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_257" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="6"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_258"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_259"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_259_default"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_258" xlink:to="loc_srt_RangeMember_259_default" use="optional" order="9"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_254"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_257" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_254" use="optional" order="10"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_255"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_254" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_255" use="optional" order="11"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_255_default"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_254" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_255_default" use="optional" order="12"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220331.xsd#genc_CurrentLiabilitiesMember" xlink:label="loc_genc_CurrentLiabilitiesMember_260"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_255" xlink:to="loc_genc_CurrentLiabilitiesMember_260" use="optional" order="13"/> |
| | </definitionLink> |
| <definitionLink xlink:type="extended" xlink:role="http://www.gencor.com/role/LeasesSummaryOfOtherInformationConcerningTheCompanySOperatingLeaseDetail"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_781895"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_781888"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781895" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_781888" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermAxis" xlink:label="loc_us-gaap_LeaseContractualTermAxis_781892"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_781888" xlink:to="loc_us-gaap_LeaseContractualTermAxis_781892" use="optional" order="2"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermDomain" xlink:label="loc_us-gaap_LeaseContractualTermDomain_781893"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LeaseContractualTermAxis_781892" xlink:to="loc_us-gaap_LeaseContractualTermDomain_781893" use="optional" order="3"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseContractualTermDomain" xlink:label="loc_us-gaap_LeaseContractualTermDomain_781893_default"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LeaseContractualTermAxis_781892" xlink:to="loc_us-gaap_LeaseContractualTermDomain_781893_default" use="optional" order="4"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220331.xsd#genc_NewLeaseAgreementMember" xlink:label="loc_genc_NewLeaseAgreementMember_781894"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_781893" xlink:to="loc_genc_NewLeaseAgreementMember_781894" use="optional" order="5"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_781889"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_781888" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_781889" use="optional" order="6"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_781890"/> |
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| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_781890_default"/> |
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| | <loc xlink:type="locator" xlink:href="genc-20220331.xsd#genc_BlawKnoxProductLineFromVolvoCeMember" xlink:label="loc_genc_BlawKnoxProductLineFromVolvoCeMember_781891"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_781890" xlink:to="loc_genc_BlawKnoxProductLineFromVolvoCeMember_781891" use="optional" order="9"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_771325"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781895" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_771325" use="optional" order="10"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_775670"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781895" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_775670" use="optional" order="11"/> |
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| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781895" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_771324" use="optional" order="12"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_775671"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781895" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_775671" use="optional" order="13"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_775672"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781895" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_775672" use="optional" order="14"/> |
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| <definitionLink xlink:type="extended" xlink:role="http://www.gencor.com/role/LeasesAdditionalInformationDetail"> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_781882"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_771302"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781882" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_771302" use="optional" order="1"/> |
| | <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseExpense" xlink:label="loc_us-gaap_OperatingLeaseExpense_771303"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781882" xlink:to="loc_us-gaap_OperatingLeaseExpense_771303" use="optional" order="2"/> |
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| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781882" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_781883" use="optional" order="3"/> |
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| | <loc xlink:type="locator" xlink:href="genc-20220331.xsd#genc_RenewalEventMember" xlink:label="loc_genc_RenewalEventMember_1264881"/> |
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| | <loc xlink:type="locator" xlink:href="genc-20220331.xsd#genc_SquareFootageLeasedEventMember" xlink:label="loc_genc_SquareFootageLeasedEventMember_1418178"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_genc_EventBasisDomain_1264880" xlink:to="loc_genc_SquareFootageLeasedEventMember_1418178" use="optional" order="18"/> |
| | <loc xlink:type="locator" xlink:href="genc-20220331.xsd#genc_DecreaseInLeasingArrangementsRightOfUseAssetAndLeaseLiability" xlink:label="loc_genc_DecreaseInLeasingArrangementsRightOfUseAssetAndLeaseLiability_1418175"/> |
| | <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_781882" xlink:to="loc_genc_DecreaseInLeasingArrangementsRightOfUseAssetAndLeaseLiability_1418175" use="optional" order="19"/> |
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