| | | | | | | | | | | | | | | | | | | | | |
<?xml version="1.0" encoding="windows-1252"?> |
<!-- XBRL Document Created with Wdesk from Workiva --> |
<!-- Copyright 2020 Workiva --> |
<!-- r:34ccc6b1-f050-4216-a867-9612c298525a,g:2928cba3-68ea-4cc5-999a-c343b0216c16 --> |
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"> |
| <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/> |
| <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/> |
| <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/> |
| <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/> |
| <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/Cover" xlink:type="simple" xlink:href="msa-20200630.xsd#Cover"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/Cover" xlink:type="extended" id="ia2b04dc1b404443e9a15910e10d766a2_Cover"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/CondensedConsolidatedStatementofIncome" xlink:type="simple" xlink:href="msa-20200630.xsd#CondensedConsolidatedStatementofIncome"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/CondensedConsolidatedStatementofIncome" xlink:type="extended" id="i605862e341dd4336a733bcc47397d4ec_CondensedConsolidatedStatementofIncome"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/CondensedConsolidatedStatementofComprehensiveIncome" xlink:type="simple" xlink:href="msa-20200630.xsd#CondensedConsolidatedStatementofComprehensiveIncome"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/CondensedConsolidatedStatementofComprehensiveIncome" xlink:type="extended" id="i78ad0d8f1a694ad1988ec05d1d7a84fc_CondensedConsolidatedStatementofComprehensiveIncome"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/CondensedConsolidatedBalanceSheet" xlink:type="simple" xlink:href="msa-20200630.xsd#CondensedConsolidatedBalanceSheet"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/CondensedConsolidatedBalanceSheet" xlink:type="extended" id="icb64bdfb38ab4ec6b0a944625df9f69a_CondensedConsolidatedBalanceSheet"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/CondensedConsolidatedBalanceSheetParenthetical" xlink:type="simple" xlink:href="msa-20200630.xsd#CondensedConsolidatedBalanceSheetParenthetical"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/CondensedConsolidatedBalanceSheetParenthetical" xlink:type="extended" id="i45400c1bf6d44b70b3b36da07f1d7ec6_CondensedConsolidatedBalanceSheetParenthetical"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_51286332-4009-4e19-a7c2-3073926b1725" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendRatePercentage_bcfab012-e878-4053-aedf-5960de8f91ec" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockDividendRatePercentage"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_51286332-4009-4e19-a7c2-3073926b1725" xlink:to="loc_us-gaap_PreferredStockDividendRatePercentage_bcfab012-e878-4053-aedf-5960de8f91ec" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_22ce76bd-7c53-417f-8fdc-ff7045614cf0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_51286332-4009-4e19-a7c2-3073926b1725" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_22ce76bd-7c53-417f-8fdc-ff7045614cf0" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_3d911d4b-1a1b-4617-b77d-6b1301c660a9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_51286332-4009-4e19-a7c2-3073926b1725" xlink:to="loc_us-gaap_StatementTable_3d911d4b-1a1b-4617-b77d-6b1301c660a9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_775207a6-4179-4ac5-913c-e2229bebcad3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_3d911d4b-1a1b-4617-b77d-6b1301c660a9" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_775207a6-4179-4ac5-913c-e2229bebcad3" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_775207a6-4179-4ac5-913c-e2229bebcad3_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_775207a6-4179-4ac5-913c-e2229bebcad3" xlink:to="loc_us-gaap_EquityComponentDomain_775207a6-4179-4ac5-913c-e2229bebcad3_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_3d1b67c1-6e86-480f-b33d-652bfc13b896" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_775207a6-4179-4ac5-913c-e2229bebcad3" xlink:to="loc_us-gaap_EquityComponentDomain_3d1b67c1-6e86-480f-b33d-652bfc13b896" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember_6c414f60-0d0b-4ef7-81a2-f7cff15fc99f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_3d1b67c1-6e86-480f-b33d-652bfc13b896" xlink:to="loc_us-gaap_PreferredStockMember_6c414f60-0d0b-4ef7-81a2-f7cff15fc99f" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/CondensedConsolidatedStatementofCashFlows" xlink:type="simple" xlink:href="msa-20200630.xsd#CondensedConsolidatedStatementofCashFlows"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/CondensedConsolidatedStatementofCashFlows" xlink:type="extended" id="iaf176ee59c164c1b8ab5112ac7327e29_CondensedConsolidatedStatementofCashFlows"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/CondensedConsolidatedStatementofChangesinRetainedEarningsAccumulatedOtherComprehensiveLossandNoncontrollingInterests" xlink:type="simple" xlink:href="msa-20200630.xsd#CondensedConsolidatedStatementofChangesinRetainedEarningsAccumulatedOtherComprehensiveLossandNoncontrollingInterests"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/CondensedConsolidatedStatementofChangesinRetainedEarningsAccumulatedOtherComprehensiveLossandNoncontrollingInterests" xlink:type="extended" id="i28aa228d1957454aa1dca4e41c56ca1d_CondensedConsolidatedStatementofChangesinRetainedEarningsAccumulatedOtherComprehensiveLossandNoncontrollingInterests"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_fb32eb45-f0af-42a1-b4af-c5735f8d4849" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d133a0d8-de47-411a-8aac-bf0642b57a49" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_fb32eb45-f0af-42a1-b4af-c5735f8d4849" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d133a0d8-de47-411a-8aac-bf0642b57a49" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_f2afcdcc-1e84-4521-a231-58f8d43aae7f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d133a0d8-de47-411a-8aac-bf0642b57a49" xlink:to="loc_us-gaap_StockholdersEquity_f2afcdcc-1e84-4521-a231-58f8d43aae7f" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_a11a2c1b-c8d4-469e-aa5c-aee99d28fa56" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d133a0d8-de47-411a-8aac-bf0642b57a49" xlink:to="loc_us-gaap_NetIncomeLoss_a11a2c1b-c8d4-469e-aa5c-aee99d28fa56" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_5ea7cae2-3a5f-49fe-8795-e76744b1f9ab" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d133a0d8-de47-411a-8aac-bf0642b57a49" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_5ea7cae2-3a5f-49fe-8795-e76744b1f9ab" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_822be27c-4fae-476a-b9bb-68f4f7e0f799" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d133a0d8-de47-411a-8aac-bf0642b57a49" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_822be27c-4fae-476a-b9bb-68f4f7e0f799" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedGainLoss_aed280c2-1156-4d30-bb16-064b32e8a892" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedGainLoss"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d133a0d8-de47-411a-8aac-bf0642b57a49" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedGainLoss_aed280c2-1156-4d30-bb16-064b32e8a892" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TranslationAdjustmentFunctionalToReportingCurrencyGainLossReclassifiedToEarningsNetOfTax_b1f4b0f8-51df-4359-8677-37a2a16822dd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TranslationAdjustmentFunctionalToReportingCurrencyGainLossReclassifiedToEarningsNetOfTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d133a0d8-de47-411a-8aac-bf0642b57a49" xlink:to="loc_us-gaap_TranslationAdjustmentFunctionalToReportingCurrencyGainLossReclassifiedToEarningsNetOfTax_b1f4b0f8-51df-4359-8677-37a2a16822dd" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_f93607f1-54f8-407d-841c-f3f3dd0bed7e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d133a0d8-de47-411a-8aac-bf0642b57a49" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_f93607f1-54f8-407d-841c-f3f3dd0bed7e" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockStock_c409c07e-9002-44c5-8e10-d27370d4b99d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DividendsCommonStockStock"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d133a0d8-de47-411a-8aac-bf0642b57a49" xlink:to="loc_us-gaap_DividendsCommonStockStock_c409c07e-9002-44c5-8e10-d27370d4b99d" xlink:type="arc" order="8"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPreferredStockStock_463df697-4251-4d43-8947-7e111e0fe5c4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DividendsPreferredStockStock"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d133a0d8-de47-411a-8aac-bf0642b57a49" xlink:to="loc_us-gaap_DividendsPreferredStockStock_463df697-4251-4d43-8947-7e111e0fe5c4" xlink:type="arc" order="9"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_02226ba8-994f-450c-b4eb-b80e8ab5d94b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d133a0d8-de47-411a-8aac-bf0642b57a49" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_02226ba8-994f-450c-b4eb-b80e8ab5d94b" xlink:type="arc" order="10"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_f16d0576-7b01-4cec-b8c0-1be035508820" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_387da3f8-5cf4-4170-b1cd-9e084a098dc1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_fb32eb45-f0af-42a1-b4af-c5735f8d4849" xlink:to="loc_us-gaap_StatementTable_387da3f8-5cf4-4170-b1cd-9e084a098dc1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_CumulativeEffectPeriodOfAdoptionAxis_1fb52996-58f6-4b8b-a11d-2e017def60bd" xlink:href="msa-20200630.xsd#msa_CumulativeEffectPeriodOfAdoptionAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_387da3f8-5cf4-4170-b1cd-9e084a098dc1" xlink:to="loc_msa_CumulativeEffectPeriodOfAdoptionAxis_1fb52996-58f6-4b8b-a11d-2e017def60bd" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_CumulativeEffectPeriodOfAdoptionDomain_1fb52996-58f6-4b8b-a11d-2e017def60bd_default" xlink:href="msa-20200630.xsd#msa_CumulativeEffectPeriodOfAdoptionDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_msa_CumulativeEffectPeriodOfAdoptionAxis_1fb52996-58f6-4b8b-a11d-2e017def60bd" xlink:to="loc_msa_CumulativeEffectPeriodOfAdoptionDomain_1fb52996-58f6-4b8b-a11d-2e017def60bd_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_CumulativeEffectPeriodOfAdoptionDomain_438b7c48-13ee-4b87-ae77-0ab07ccc8cda" xlink:href="msa-20200630.xsd#msa_CumulativeEffectPeriodOfAdoptionDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_msa_CumulativeEffectPeriodOfAdoptionAxis_1fb52996-58f6-4b8b-a11d-2e017def60bd" xlink:to="loc_msa_CumulativeEffectPeriodOfAdoptionDomain_438b7c48-13ee-4b87-ae77-0ab07ccc8cda" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_CumulativeEffectPeriodofAdoptionAdjustmentMember_2571546d-2676-4e31-8f80-f9042308b77d" xlink:href="msa-20200630.xsd#msa_CumulativeEffectPeriodofAdoptionAdjustmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_msa_CumulativeEffectPeriodOfAdoptionDomain_438b7c48-13ee-4b87-ae77-0ab07ccc8cda" xlink:to="loc_msa_CumulativeEffectPeriodofAdoptionAdjustmentMember_2571546d-2676-4e31-8f80-f9042308b77d" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_8bb99253-3b7c-4ede-960b-01750694b35e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_387da3f8-5cf4-4170-b1cd-9e084a098dc1" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_8bb99253-3b7c-4ede-960b-01750694b35e" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_8bb99253-3b7c-4ede-960b-01750694b35e_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_8bb99253-3b7c-4ede-960b-01750694b35e" xlink:to="loc_us-gaap_EquityComponentDomain_8bb99253-3b7c-4ede-960b-01750694b35e_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_b966a72b-f4fa-4cfd-8986-8f6d7b5968d1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_8bb99253-3b7c-4ede-960b-01750694b35e" xlink:to="loc_us-gaap_EquityComponentDomain_b966a72b-f4fa-4cfd-8986-8f6d7b5968d1" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_7d2ce342-71f1-4444-9887-c0505fd71702" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_b966a72b-f4fa-4cfd-8986-8f6d7b5968d1" xlink:to="loc_us-gaap_RetainedEarningsMember_7d2ce342-71f1-4444-9887-c0505fd71702" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_5037640a-de4d-40bb-b225-ba49f742c395" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_b966a72b-f4fa-4cfd-8986-8f6d7b5968d1" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_5037640a-de4d-40bb-b225-ba49f742c395" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_87d2c4da-f9ee-4703-aabb-05052c95f468" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoncontrollingInterestMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_b966a72b-f4fa-4cfd-8986-8f6d7b5968d1" xlink:to="loc_us-gaap_NoncontrollingInterestMember_87d2c4da-f9ee-4703-aabb-05052c95f468" xlink:type="arc" order="2"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/CondensedConsolidatedStatementofChangesinRetainedEarningsAccumulatedOtherComprehensiveLossandNoncontrollingInterestsParenthetical" xlink:type="simple" xlink:href="msa-20200630.xsd#CondensedConsolidatedStatementofChangesinRetainedEarningsAccumulatedOtherComprehensiveLossandNoncontrollingInterestsParenthetical"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/CondensedConsolidatedStatementofChangesinRetainedEarningsAccumulatedOtherComprehensiveLossandNoncontrollingInterestsParenthetical" xlink:type="extended" id="i1f5045a11de84d8fbec774449db229b7_CondensedConsolidatedStatementofChangesinRetainedEarningsAccumulatedOtherComprehensiveLossandNoncontrollingInterestsParenthetical"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/BasisofPresentation" xlink:type="simple" xlink:href="msa-20200630.xsd#BasisofPresentation"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/BasisofPresentation" xlink:type="extended" id="i334d51d1feef4bd1bb0b82107d8ca015_BasisofPresentation"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/RecentlyAdoptedandRecentlyIssuedAccountingStandards" xlink:type="simple" xlink:href="msa-20200630.xsd#RecentlyAdoptedandRecentlyIssuedAccountingStandards"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/RecentlyAdoptedandRecentlyIssuedAccountingStandards" xlink:type="extended" id="i53df9e61cdd847518f87ccd381edb39b_RecentlyAdoptedandRecentlyIssuedAccountingStandards"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/RecentlyAdoptedandRecentlyIssuedAccountingStandardsPolicies" xlink:type="simple" xlink:href="msa-20200630.xsd#RecentlyAdoptedandRecentlyIssuedAccountingStandardsPolicies"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/RecentlyAdoptedandRecentlyIssuedAccountingStandardsPolicies" xlink:type="extended" id="i4976f36bb372464c85a1497c89dad860_RecentlyAdoptedandRecentlyIssuedAccountingStandardsPolicies"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/Inventories" xlink:type="simple" xlink:href="msa-20200630.xsd#Inventories"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/Inventories" xlink:type="extended" id="ibcd3411ed14243c0a7564816a60ff52b_Inventories"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/InventoriesTables" xlink:type="simple" xlink:href="msa-20200630.xsd#InventoriesTables"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/InventoriesTables" xlink:type="extended" id="i1d717eed4d47440da628e21412204729_InventoriesTables"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/InventoriesScheduleofInventoriesDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#InventoriesScheduleofInventoriesDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/InventoriesScheduleofInventoriesDetails" xlink:type="extended" id="i5d5294614940444a9381e6e01b191ad3_InventoriesScheduleofInventoriesDetails"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/RestructuringCharges" xlink:type="simple" xlink:href="msa-20200630.xsd#RestructuringCharges"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/RestructuringCharges" xlink:type="extended" id="i8e2a16c5ddd5483fb6b9cdbebd46ed61_RestructuringCharges"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/RestructuringChargesTables" xlink:type="simple" xlink:href="msa-20200630.xsd#RestructuringChargesTables"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/RestructuringChargesTables" xlink:type="extended" id="i12f16ad0e2d1429cbbe8ed978af97a93_RestructuringChargesTables"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/RestructuringChargesAdditionalInformationDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#RestructuringChargesAdditionalInformationDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/RestructuringChargesAdditionalInformationDetails" xlink:type="extended" id="i0a8881d6ac7a4e3993d87a6693dd55b1_RestructuringChargesAdditionalInformationDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_7b8786a2-5146-48d4-b873-5e974ae83257" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_8a42374d-46ef-4f67-bed1-2260791f01ea" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringCharges"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7b8786a2-5146-48d4-b873-5e974ae83257" xlink:to="loc_us-gaap_RestructuringCharges_8a42374d-46ef-4f67-bed1-2260791f01ea" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_c0a3bc57-da1e-4e5a-b860-3de38eebc94e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7b8786a2-5146-48d4-b873-5e974ae83257" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_c0a3bc57-da1e-4e5a-b860-3de38eebc94e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_7781d869-fdb5-4056-9233-8b5cc2192162" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_c0a3bc57-da1e-4e5a-b860-3de38eebc94e" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_7781d869-fdb5-4056-9233-8b5cc2192162" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_7781d869-fdb5-4056-9233-8b5cc2192162_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_7781d869-fdb5-4056-9233-8b5cc2192162" xlink:to="loc_us-gaap_SegmentDomain_7781d869-fdb5-4056-9233-8b5cc2192162_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_e8576985-e6b0-4291-b280-ba8dfd2c9201" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_7781d869-fdb5-4056-9233-8b5cc2192162" xlink:to="loc_us-gaap_SegmentDomain_e8576985-e6b0-4291-b280-ba8dfd2c9201" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_InternationalMember_4ccadf52-6ec7-4daf-afca-25175ff8d9af" xlink:href="msa-20200630.xsd#msa_InternationalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_e8576985-e6b0-4291-b280-ba8dfd2c9201" xlink:to="loc_msa_InternationalMember_4ccadf52-6ec7-4daf-afca-25175ff8d9af" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateMember_d2d0134e-2ff0-4353-98f1-ea67076b0bef" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CorporateMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_e8576985-e6b0-4291-b280-ba8dfd2c9201" xlink:to="loc_us-gaap_CorporateMember_d2d0134e-2ff0-4353-98f1-ea67076b0bef" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/RestructuringChargesActivityandReserveBalanceforRestructuringChargesbySegmentDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#RestructuringChargesActivityandReserveBalanceforRestructuringChargesbySegmentDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/RestructuringChargesActivityandReserveBalanceforRestructuringChargesbySegmentDetails" xlink:type="extended" id="i5053c5ada25f427cb452054e68830cd3_RestructuringChargesActivityandReserveBalanceforRestructuringChargesbySegmentDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_ac2e6479-bb20-4f19-9f3c-3bae155496ad" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveRollForward_87f8e3a0-b9b1-466d-9ca6-2be657629fd1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringReserveRollForward"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_ac2e6479-bb20-4f19-9f3c-3bae155496ad" xlink:to="loc_us-gaap_RestructuringReserveRollForward_87f8e3a0-b9b1-466d-9ca6-2be657629fd1" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_ae24764f-b0df-4ae2-96b4-b172a8c250c9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringReserve"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_87f8e3a0-b9b1-466d-9ca6-2be657629fd1" xlink:to="loc_us-gaap_RestructuringReserve_ae24764f-b0df-4ae2-96b4-b172a8c250c9" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_RestructuringChargesbeforeAdjustments_60b5427f-7461-41ce-93a7-65dd05f222c3" xlink:href="msa-20200630.xsd#msa_RestructuringChargesbeforeAdjustments"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_87f8e3a0-b9b1-466d-9ca6-2be657629fd1" xlink:to="loc_msa_RestructuringChargesbeforeAdjustments_60b5427f-7461-41ce-93a7-65dd05f222c3" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveAccrualAdjustment1_233adc8a-498c-4ce9-af01-6affbadd4e55" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringReserveAccrualAdjustment1"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_87f8e3a0-b9b1-466d-9ca6-2be657629fd1" xlink:to="loc_us-gaap_RestructuringReserveAccrualAdjustment1_233adc8a-498c-4ce9-af01-6affbadd4e55" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRestructuring_5a693afc-55dc-4b8d-ad4b-d596e7701545" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsForRestructuring"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_87f8e3a0-b9b1-466d-9ca6-2be657629fd1" xlink:to="loc_us-gaap_PaymentsForRestructuring_5a693afc-55dc-4b8d-ad4b-d596e7701545" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_7134ca65-459c-453b-9599-943483d9be27" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringReserve"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_afe62036-2b24-459b-ae5f-97756f5fd9cd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_ac2e6479-bb20-4f19-9f3c-3bae155496ad" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_afe62036-2b24-459b-ae5f-97756f5fd9cd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_c392158d-7836-40e2-8a2f-bb8504324bd5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_afe62036-2b24-459b-ae5f-97756f5fd9cd" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_c392158d-7836-40e2-8a2f-bb8504324bd5" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_c392158d-7836-40e2-8a2f-bb8504324bd5_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_c392158d-7836-40e2-8a2f-bb8504324bd5" xlink:to="loc_us-gaap_SegmentDomain_c392158d-7836-40e2-8a2f-bb8504324bd5_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_6ee0adfb-0c76-4593-ab91-a6ab2d248ffa" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_c392158d-7836-40e2-8a2f-bb8504324bd5" xlink:to="loc_us-gaap_SegmentDomain_6ee0adfb-0c76-4593-ab91-a6ab2d248ffa" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_AmericasMember_cd42769e-3c4e-4e6b-9c54-a327166507cf" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_AmericasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_6ee0adfb-0c76-4593-ab91-a6ab2d248ffa" xlink:to="loc_srt_AmericasMember_cd42769e-3c4e-4e6b-9c54-a327166507cf" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_InternationalMember_01f3cc6d-d449-4dc3-a291-65b4ca4b38ff" xlink:href="msa-20200630.xsd#msa_InternationalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_6ee0adfb-0c76-4593-ab91-a6ab2d248ffa" xlink:to="loc_msa_InternationalMember_01f3cc6d-d449-4dc3-a291-65b4ca4b38ff" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateMember_ae6f0ae8-ad6a-412a-9487-678bc1080aca" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CorporateMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_6ee0adfb-0c76-4593-ab91-a6ab2d248ffa" xlink:to="loc_us-gaap_CorporateMember_ae6f0ae8-ad6a-412a-9487-678bc1080aca" xlink:type="arc" order="2"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/PropertyPlantandEquipment" xlink:type="simple" xlink:href="msa-20200630.xsd#PropertyPlantandEquipment"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/PropertyPlantandEquipment" xlink:type="extended" id="ie0b50ed9c4a84ed1ab2cd0aa4ef7e34d_PropertyPlantandEquipment"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/PropertyPlantandEquipmentTables" xlink:type="simple" xlink:href="msa-20200630.xsd#PropertyPlantandEquipmentTables"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/PropertyPlantandEquipmentTables" xlink:type="extended" id="i99dfffdc570145b0b22387858fca9ea1_PropertyPlantandEquipmentTables"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/PropertyPlantandEquipmentDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#PropertyPlantandEquipmentDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/PropertyPlantandEquipmentDetails" xlink:type="extended" id="ie36caffa39474c88a20cf95e4832caf3_PropertyPlantandEquipmentDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_a549509a-36d8-45da-9f96-bad1af97b8f9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_7368b467-2942-4e59-8512-77c09e5f38d9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_a549509a-36d8-45da-9f96-bad1af97b8f9" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_7368b467-2942-4e59-8512-77c09e5f38d9" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_a9451269-2867-4bc4-af9e-28e194f935c0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_a549509a-36d8-45da-9f96-bad1af97b8f9" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_a9451269-2867-4bc4-af9e-28e194f935c0" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_395a1610-a953-4507-8aea-6cb024349e47" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_a549509a-36d8-45da-9f96-bad1af97b8f9" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_395a1610-a953-4507-8aea-6cb024349e47" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_218e13aa-b95a-42d2-8fd0-076fe625361e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_a549509a-36d8-45da-9f96-bad1af97b8f9" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_218e13aa-b95a-42d2-8fd0-076fe625361e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_9a39ba4c-ba31-47ff-8350-87155463397f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_218e13aa-b95a-42d2-8fd0-076fe625361e" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_9a39ba4c-ba31-47ff-8350-87155463397f" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_9a39ba4c-ba31-47ff-8350-87155463397f_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_9a39ba4c-ba31-47ff-8350-87155463397f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_9a39ba4c-ba31-47ff-8350-87155463397f_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_ac0ddfa3-7fe6-43d7-a369-3bd9cb336dde" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_9a39ba4c-ba31-47ff-8350-87155463397f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_ac0ddfa3-7fe6-43d7-a369-3bd9cb336dde" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_94fb32b0-a768-475e-8c4b-eca7a7bd86d1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LandMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_ac0ddfa3-7fe6-43d7-a369-3bd9cb336dde" xlink:to="loc_us-gaap_LandMember_94fb32b0-a768-475e-8c4b-eca7a7bd86d1" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_fbd0eecf-6597-41cf-bcd9-707af4a2223b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BuildingMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_ac0ddfa3-7fe6-43d7-a369-3bd9cb336dde" xlink:to="loc_us-gaap_BuildingMember_fbd0eecf-6597-41cf-bcd9-707af4a2223b" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_6bebc75f-31ba-4c10-b4d9-5a73b4538cdd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MachineryAndEquipmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_ac0ddfa3-7fe6-43d7-a369-3bd9cb336dde" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_6bebc75f-31ba-4c10-b4d9-5a73b4538cdd" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_7abfdc5b-cc3c-4592-9d8f-3cf555088f25" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConstructionInProgressMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_ac0ddfa3-7fe6-43d7-a369-3bd9cb336dde" xlink:to="loc_us-gaap_ConstructionInProgressMember_7abfdc5b-cc3c-4592-9d8f-3cf555088f25" xlink:type="arc" order="3"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/ReclassificationsOutofAccumulatedOtherComprehensiveLoss" xlink:type="simple" xlink:href="msa-20200630.xsd#ReclassificationsOutofAccumulatedOtherComprehensiveLoss"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/ReclassificationsOutofAccumulatedOtherComprehensiveLoss" xlink:type="extended" id="ibc203216146a49e6a8988f543c179722_ReclassificationsOutofAccumulatedOtherComprehensiveLoss"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/ReclassificationsOutofAccumulatedOtherComprehensiveLossTables" xlink:type="simple" xlink:href="msa-20200630.xsd#ReclassificationsOutofAccumulatedOtherComprehensiveLossTables"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/ReclassificationsOutofAccumulatedOtherComprehensiveLossTables" xlink:type="extended" id="i695902b8e8dd45ee91e570ccd791bfda_ReclassificationsOutofAccumulatedOtherComprehensiveLossTables"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/ReclassificationsOutofAccumulatedOtherComprehensiveLossDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#ReclassificationsOutofAccumulatedOtherComprehensiveLossDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/ReclassificationsOutofAccumulatedOtherComprehensiveLossDetails" xlink:type="extended" id="ib94e4375ddc8431fb7382dbd969929e4_ReclassificationsOutofAccumulatedOtherComprehensiveLossDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_79993d5e-460d-496c-92ba-976328096020" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_35e895a6-87a7-42af-96ef-65ba8e976762" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_79993d5e-460d-496c-92ba-976328096020" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_35e895a6-87a7-42af-96ef-65ba8e976762" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_b6cb70c5-14b7-4440-9a70-5258ba1ef40d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_35e895a6-87a7-42af-96ef-65ba8e976762" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_b6cb70c5-14b7-4440-9a70-5258ba1ef40d" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_9ad884a9-73f1-42e0-a41b-691b7c97eff1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_35e895a6-87a7-42af-96ef-65ba8e976762" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_9ad884a9-73f1-42e0-a41b-691b7c97eff1" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_d955ad23-c1a2-48d1-9c90-60c01d0edf0f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationFromAociCurrentPeriodTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_35e895a6-87a7-42af-96ef-65ba8e976762" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_d955ad23-c1a2-48d1-9c90-60c01d0edf0f" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_2466d326-cb5a-4f22-9bc1-75501fbf9ce8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_35e895a6-87a7-42af-96ef-65ba8e976762" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_2466d326-cb5a-4f22-9bc1-75501fbf9ce8" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_c846965d-35e5-4190-99a6-89cacdb74699" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_35e895a6-87a7-42af-96ef-65ba8e976762" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_c846965d-35e5-4190-99a6-89cacdb74699" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_745ef80d-809e-46fe-a08f-e8fceebfec46" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_35e895a6-87a7-42af-96ef-65ba8e976762" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_745ef80d-809e-46fe-a08f-e8fceebfec46" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_0e60d7bc-63f1-44bd-8548-21b112de76fc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_a50f3da0-518f-49aa-b327-1256ac8b40e3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_79993d5e-460d-496c-92ba-976328096020" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_a50f3da0-518f-49aa-b327-1256ac8b40e3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_7d0cf6b6-fb82-4120-ab79-ccf756b16c31" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_a50f3da0-518f-49aa-b327-1256ac8b40e3" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_7d0cf6b6-fb82-4120-ab79-ccf756b16c31" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_7d0cf6b6-fb82-4120-ab79-ccf756b16c31_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_7d0cf6b6-fb82-4120-ab79-ccf756b16c31" xlink:to="loc_us-gaap_EquityComponentDomain_7d0cf6b6-fb82-4120-ab79-ccf756b16c31_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_baff39ce-eeda-4193-b283-097c52a43e7a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_7d0cf6b6-fb82-4120-ab79-ccf756b16c31" xlink:to="loc_us-gaap_EquityComponentDomain_baff39ce-eeda-4193-b283-097c52a43e7a" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_d4f488c4-fe29-4883-9374-009620430d8c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_baff39ce-eeda-4193-b283-097c52a43e7a" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_d4f488c4-fe29-4883-9374-009620430d8c" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentAttributableToNoncontrollingInterestMember_5cc90b7f-5a62-4518-82a0-86af529c9fa0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentAttributableToNoncontrollingInterestMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_baff39ce-eeda-4193-b283-097c52a43e7a" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentAttributableToNoncontrollingInterestMember_5cc90b7f-5a62-4518-82a0-86af529c9fa0" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_90a68305-8c95-427d-b8bd-cb08c6e6f87a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_baff39ce-eeda-4193-b283-097c52a43e7a" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_90a68305-8c95-427d-b8bd-cb08c6e6f87a" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceAttributableToNoncontrollingInterestMember_cdea29fc-0ab3-440f-9c48-881df8a60d98" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceAttributableToNoncontrollingInterestMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_baff39ce-eeda-4193-b283-097c52a43e7a" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceAttributableToNoncontrollingInterestMember_cdea29fc-0ab3-440f-9c48-881df8a60d98" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_7c55b842-f885-41a2-98e4-b0eb46de2d59" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_baff39ce-eeda-4193-b283-097c52a43e7a" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_7c55b842-f885-41a2-98e4-b0eb46de2d59" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetGainLossAttributableToNoncontrollingInterestMember_3a783842-53f8-4af9-b1fe-c14c987ec1e2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetGainLossAttributableToNoncontrollingInterestMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_baff39ce-eeda-4193-b283-097c52a43e7a" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetGainLossAttributableToNoncontrollingInterestMember_3a783842-53f8-4af9-b1fe-c14c987ec1e2" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_e7dcb803-0dd2-4b75-9cb3-1d660a0fcfa9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_baff39ce-eeda-4193-b283-097c52a43e7a" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_e7dcb803-0dd2-4b75-9cb3-1d660a0fcfa9" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetInvestmentGainLossAttributableToNoncontrollingInterestMember_929c6cf3-35b5-464e-a192-e63c0142a463" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedNetInvestmentGainLossAttributableToNoncontrollingInterestMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_baff39ce-eeda-4193-b283-097c52a43e7a" xlink:to="loc_us-gaap_AccumulatedNetInvestmentGainLossAttributableToNoncontrollingInterestMember_929c6cf3-35b5-464e-a192-e63c0142a463" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_cc2b4aa6-1216-41c9-bb92-0c9d72f440ab" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_baff39ce-eeda-4193-b283-097c52a43e7a" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_cc2b4aa6-1216-41c9-bb92-0c9d72f440ab" xlink:type="arc" order="8"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedForeignCurrencyAdjustmentAttributableToNoncontrollingInterestMember_b91a2b44-e8f4-4a0d-8bed-dd9f93223445" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedForeignCurrencyAdjustmentAttributableToNoncontrollingInterestMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_baff39ce-eeda-4193-b283-097c52a43e7a" xlink:to="loc_us-gaap_AccumulatedForeignCurrencyAdjustmentAttributableToNoncontrollingInterestMember_b91a2b44-e8f4-4a0d-8bed-dd9f93223445" xlink:type="arc" order="9"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_256e465e-6b7a-4eb7-bd92-e0e612f9196c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_a50f3da0-518f-49aa-b327-1256ac8b40e3" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_256e465e-6b7a-4eb7-bd92-e0e612f9196c" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfAdoptionMember_256e465e-6b7a-4eb7-bd92-e0e612f9196c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfAdoptionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_256e465e-6b7a-4eb7-bd92-e0e612f9196c" xlink:to="loc_us-gaap_TypeOfAdoptionMember_256e465e-6b7a-4eb7-bd92-e0e612f9196c_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfAdoptionMember_a1591e39-d664-43de-8c9e-1e638b5de768" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfAdoptionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_256e465e-6b7a-4eb7-bd92-e0e612f9196c" xlink:to="loc_us-gaap_TypeOfAdoptionMember_a1591e39-d664-43de-8c9e-1e638b5de768" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementMember_2a4ec69c-832f-4e55-8040-dfd287f6ea29" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NewAccountingPronouncementMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_a1591e39-d664-43de-8c9e-1e638b5de768" xlink:to="loc_us-gaap_NewAccountingPronouncementMember_2a4ec69c-832f-4e55-8040-dfd287f6ea29" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/CapitalStock" xlink:type="simple" xlink:href="msa-20200630.xsd#CapitalStock"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/CapitalStock" xlink:type="extended" id="i1bc20fd0d5bc4c04a3bfec4c4a41316e_CapitalStock"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/CapitalStockTables" xlink:type="simple" xlink:href="msa-20200630.xsd#CapitalStockTables"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/CapitalStockTables" xlink:type="extended" id="i034ece21ceb64795853cb1e778a09fcd_CapitalStockTables"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/CapitalStockNarrativeDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#CapitalStockNarrativeDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/CapitalStockNarrativeDetails" xlink:type="extended" id="i079da74fa60940be98d35d2e7f45fad1_CapitalStockNarrativeDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalUnitLineItems_675b4d40-ee58-4123-b8c2-25c20b05544b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalUnitLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_9fdb69e3-e73d-4f10-9d0c-078376ada0a8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockSharesAuthorized"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_675b4d40-ee58-4123-b8c2-25c20b05544b" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_9fdb69e3-e73d-4f10-9d0c-078376ada0a8" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_50a0b067-4db8-42cf-9525-c3909f9ede75" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_675b4d40-ee58-4123-b8c2-25c20b05544b" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_50a0b067-4db8-42cf-9525-c3909f9ede75" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendRatePercentage_4afba909-09c0-4969-b303-b02beb908449" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockDividendRatePercentage"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_675b4d40-ee58-4123-b8c2-25c20b05544b" xlink:to="loc_us-gaap_PreferredStockDividendRatePercentage_4afba909-09c0-4969-b303-b02beb908449" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockRedemptionPricePerShare_0f753e13-1101-4561-aadd-a444eaf6bdcd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockRedemptionPricePerShare"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_675b4d40-ee58-4123-b8c2-25c20b05544b" xlink:to="loc_us-gaap_PreferredStockRedemptionPricePerShare_0f753e13-1101-4561-aadd-a444eaf6bdcd" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesIssued_f5c7a82d-f90c-4e64-ba64-0d632c2b9557" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockSharesIssued"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_675b4d40-ee58-4123-b8c2-25c20b05544b" xlink:to="loc_us-gaap_PreferredStockSharesIssued_f5c7a82d-f90c-4e64-ba64-0d632c2b9557" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockShares_c0daafae-a0b4-4332-aea1-ec74a3cfeaf4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockShares"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_675b4d40-ee58-4123-b8c2-25c20b05544b" xlink:to="loc_us-gaap_TreasuryStockShares_c0daafae-a0b4-4332-aea1-ec74a3cfeaf4" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValue_b3d85966-afc8-457b-aeb1-10c37f9be88a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_675b4d40-ee58-4123-b8c2-25c20b05544b" xlink:to="loc_us-gaap_TreasuryStockValue_b3d85966-afc8-457b-aeb1-10c37f9be88a" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_478141c0-d0fb-4e2f-b952-c422cd3865c0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockSharesAcquired"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_675b4d40-ee58-4123-b8c2-25c20b05544b" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_478141c0-d0fb-4e2f-b952-c422cd3865c0" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_99718ffd-efe3-4345-b0f8-75ec3418227b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockSharesAuthorized"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_675b4d40-ee58-4123-b8c2-25c20b05544b" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_99718ffd-efe3-4345-b0f8-75ec3418227b" xlink:type="arc" order="8"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockNoParValue_a5e4bbb6-5dcc-4f85-809f-fdf557aa61ff" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockNoParValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_675b4d40-ee58-4123-b8c2-25c20b05544b" xlink:to="loc_us-gaap_CommonStockNoParValue_a5e4bbb6-5dcc-4f85-809f-fdf557aa61ff" xlink:type="arc" order="9"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_38504c06-c728-4f79-9c1c-ea238e98e3f5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockSharesIssued"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_675b4d40-ee58-4123-b8c2-25c20b05544b" xlink:to="loc_us-gaap_CommonStockSharesIssued_38504c06-c728-4f79-9c1c-ea238e98e3f5" xlink:type="arc" order="10"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_201914e9-75ba-4edf-aec8-ba9d0ad09684" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_675b4d40-ee58-4123-b8c2-25c20b05544b" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_201914e9-75ba-4edf-aec8-ba9d0ad09684" xlink:type="arc" order="11"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_7d474050-02dd-4da0-86af-6f900c20bba5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_675b4d40-ee58-4123-b8c2-25c20b05544b" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_7d474050-02dd-4da0-86af-6f900c20bba5" xlink:type="arc" order="12"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_20ae885a-5fa8-47dc-b544-eeb690867472" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_675b4d40-ee58-4123-b8c2-25c20b05544b" xlink:to="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_20ae885a-5fa8-47dc-b544-eeb690867472" xlink:type="arc" order="13"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross_315b708f-b90d-456e-a4da-3a605c3425f9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalUnitLineItems_675b4d40-ee58-4123-b8c2-25c20b05544b" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross_315b708f-b90d-456e-a4da-3a605c3425f9" xlink:type="arc" order="14"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCapitalUnitsTable_2b697492-40eb-465a-bf9a-972488718767" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfCapitalUnitsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CapitalUnitLineItems_675b4d40-ee58-4123-b8c2-25c20b05544b" xlink:to="loc_us-gaap_ScheduleOfCapitalUnitsTable_2b697492-40eb-465a-bf9a-972488718767" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_5ad2e98c-8c48-47e6-b32c-f99884061c18" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCapitalUnitsTable_2b697492-40eb-465a-bf9a-972488718767" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_5ad2e98c-8c48-47e6-b32c-f99884061c18" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_5ad2e98c-8c48-47e6-b32c-f99884061c18_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_5ad2e98c-8c48-47e6-b32c-f99884061c18" xlink:to="loc_us-gaap_EquityComponentDomain_5ad2e98c-8c48-47e6-b32c-f99884061c18_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_882fdd7e-8db0-411c-b1e1-1b651a209784" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_5ad2e98c-8c48-47e6-b32c-f99884061c18" xlink:to="loc_us-gaap_EquityComponentDomain_882fdd7e-8db0-411c-b1e1-1b651a209784" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember_3634d44b-6e18-4984-93f8-38d4f97d61a1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_882fdd7e-8db0-411c-b1e1-1b651a209784" xlink:to="loc_us-gaap_PreferredStockMember_3634d44b-6e18-4984-93f8-38d4f97d61a1" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_8387609f-bacb-4a8d-adbf-3eb29aad74a7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementClassOfStockAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCapitalUnitsTable_2b697492-40eb-465a-bf9a-972488718767" xlink:to="loc_us-gaap_StatementClassOfStockAxis_8387609f-bacb-4a8d-adbf-3eb29aad74a7" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_8387609f-bacb-4a8d-adbf-3eb29aad74a7_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfStockDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_8387609f-bacb-4a8d-adbf-3eb29aad74a7" xlink:to="loc_us-gaap_ClassOfStockDomain_8387609f-bacb-4a8d-adbf-3eb29aad74a7_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_16507d0d-a3cb-48f6-b030-40d6455b5290" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfStockDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_8387609f-bacb-4a8d-adbf-3eb29aad74a7" xlink:to="loc_us-gaap_ClassOfStockDomain_16507d0d-a3cb-48f6-b030-40d6455b5290" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CumulativePreferredStockMember_d0b839d2-c820-42ba-aa83-42a8df439e2b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CumulativePreferredStockMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_16507d0d-a3cb-48f6-b030-40d6455b5290" xlink:to="loc_us-gaap_CumulativePreferredStockMember_d0b839d2-c820-42ba-aa83-42a8df439e2b" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_SecondCumulativePreferredVotingStockMember_a09e9771-9236-44c3-bf6d-42f431cda076" xlink:href="msa-20200630.xsd#msa_SecondCumulativePreferredVotingStockMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_16507d0d-a3cb-48f6-b030-40d6455b5290" xlink:to="loc_msa_SecondCumulativePreferredVotingStockMember_a09e9771-9236-44c3-bf6d-42f431cda076" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_92999091-2da1-4416-9d72-d00c9b5dc3e5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_16507d0d-a3cb-48f6-b030-40d6455b5290" xlink:to="loc_us-gaap_CommonStockMember_92999091-2da1-4416-9d72-d00c9b5dc3e5" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockMember_c26daa0f-7089-46bf-9ee3-e8603143b558" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_16507d0d-a3cb-48f6-b030-40d6455b5290" xlink:to="loc_us-gaap_TreasuryStockMember_c26daa0f-7089-46bf-9ee3-e8603143b558" xlink:type="arc" order="3"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/CapitalStockScheduleofCommonStockActivityDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#CapitalStockScheduleofCommonStockActivityDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/CapitalStockScheduleofCommonStockActivityDetails" xlink:type="extended" id="i7c4ef87a46984233b676ca976421af37_CapitalStockScheduleofCommonStockActivityDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_19913441-35ec-49d6-b4e6-35184248add0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfStockLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_CommonStockActivityRollForward_3ac9cf27-ef3f-4d67-bd27-06258ef6c4b0" xlink:href="msa-20200630.xsd#msa_CommonStockActivityRollForward"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_19913441-35ec-49d6-b4e6-35184248add0" xlink:to="loc_msa_CommonStockActivityRollForward_3ac9cf27-ef3f-4d67-bd27-06258ef6c4b0" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValueOutstanding_b1a06bbc-7aa1-48b0-875f-3edff1a1ce86" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockValueOutstanding"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_msa_CommonStockActivityRollForward_3ac9cf27-ef3f-4d67-bd27-06258ef6c4b0" xlink:to="loc_us-gaap_CommonStockValueOutstanding_b1a06bbc-7aa1-48b0-875f-3edff1a1ce86" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_f3c2816f-dc2a-4b6b-8bdc-2a97042f3588" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_msa_CommonStockActivityRollForward_3ac9cf27-ef3f-4d67-bd27-06258ef6c4b0" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_f3c2816f-dc2a-4b6b-8bdc-2a97042f3588" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross_41615498-d4ba-4751-8ff8-9a1e1f6118ae" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_msa_CommonStockActivityRollForward_3ac9cf27-ef3f-4d67-bd27-06258ef6c4b0" xlink:to="loc_us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross_41615498-d4ba-4751-8ff8-9a1e1f6118ae" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_9fa379a6-dc41-481f-9e7e-7c5f5d531039" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_msa_CommonStockActivityRollForward_3ac9cf27-ef3f-4d67-bd27-06258ef6c4b0" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_9fa379a6-dc41-481f-9e7e-7c5f5d531039" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValueOutstanding_cf8b196d-9ec3-4711-818a-b1bda6811f8a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockValueOutstanding"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_89e1a929-2a1f-4699-9f2c-ffeab0485319" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfStockByClassTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_19913441-35ec-49d6-b4e6-35184248add0" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_89e1a929-2a1f-4699-9f2c-ffeab0485319" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_a63ef4c4-de7d-40a0-9dd1-50efdae3a36c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_89e1a929-2a1f-4699-9f2c-ffeab0485319" xlink:to="loc_us-gaap_AwardTypeAxis_a63ef4c4-de7d-40a0-9dd1-50efdae3a36c" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a63ef4c4-de7d-40a0-9dd1-50efdae3a36c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_a63ef4c4-de7d-40a0-9dd1-50efdae3a36c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a63ef4c4-de7d-40a0-9dd1-50efdae3a36c_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8b3a6413-cc35-40d1-9c55-d930e8fa5ba7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_a63ef4c4-de7d-40a0-9dd1-50efdae3a36c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8b3a6413-cc35-40d1-9c55-d930e8fa5ba7" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_RestrictedAndPerformanceStockAwardsMember_4c895d13-74ab-45b8-880a-8a3672967ed6" xlink:href="msa-20200630.xsd#msa_RestrictedAndPerformanceStockAwardsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8b3a6413-cc35-40d1-9c55-d930e8fa5ba7" xlink:to="loc_msa_RestrictedAndPerformanceStockAwardsMember_4c895d13-74ab-45b8-880a-8a3672967ed6" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_4c74475d-fff4-4e91-8af6-2aa3a10f8854" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeStockOptionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8b3a6413-cc35-40d1-9c55-d930e8fa5ba7" xlink:to="loc_us-gaap_EmployeeStockOptionMember_4c74475d-fff4-4e91-8af6-2aa3a10f8854" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockCompensationPlanMember_d78b15cd-9fb2-491d-a9ec-f12840904f12" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockCompensationPlanMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8b3a6413-cc35-40d1-9c55-d930e8fa5ba7" xlink:to="loc_us-gaap_StockCompensationPlanMember_d78b15cd-9fb2-491d-a9ec-f12840904f12" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_1fb64e40-5acb-4161-bba4-befd7438ca5a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8b3a6413-cc35-40d1-9c55-d930e8fa5ba7" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_1fb64e40-5acb-4161-bba4-befd7438ca5a" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_StockConsiderationInAcquisitionMember_f5aab036-5679-4720-8fe1-0ce4f821c7ca" xlink:href="msa-20200630.xsd#msa_StockConsiderationInAcquisitionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8b3a6413-cc35-40d1-9c55-d930e8fa5ba7" xlink:to="loc_msa_StockConsiderationInAcquisitionMember_f5aab036-5679-4720-8fe1-0ce4f821c7ca" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_EmployeeStockPurchasePlanMember_eaa4343f-cd26-492b-9c30-b09b9a80aae7" xlink:href="msa-20200630.xsd#msa_EmployeeStockPurchasePlanMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8b3a6413-cc35-40d1-9c55-d930e8fa5ba7" xlink:to="loc_msa_EmployeeStockPurchasePlanMember_eaa4343f-cd26-492b-9c30-b09b9a80aae7" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_aa3fe1f7-09c5-4465-b75f-db5c7ca84581" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementClassOfStockAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_89e1a929-2a1f-4699-9f2c-ffeab0485319" xlink:to="loc_us-gaap_StatementClassOfStockAxis_aa3fe1f7-09c5-4465-b75f-db5c7ca84581" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_aa3fe1f7-09c5-4465-b75f-db5c7ca84581_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfStockDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_aa3fe1f7-09c5-4465-b75f-db5c7ca84581" xlink:to="loc_us-gaap_ClassOfStockDomain_aa3fe1f7-09c5-4465-b75f-db5c7ca84581_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_d7094432-32d2-4d36-8b13-255b737d5575" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfStockDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_aa3fe1f7-09c5-4465-b75f-db5c7ca84581" xlink:to="loc_us-gaap_ClassOfStockDomain_d7094432-32d2-4d36-8b13-255b737d5575" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_70448a67-c070-4db2-bead-22f111b8825a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_d7094432-32d2-4d36-8b13-255b737d5575" xlink:to="loc_us-gaap_CommonStockMember_70448a67-c070-4db2-bead-22f111b8825a" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockMember_01a16fa2-0557-43cd-ae75-4193c9b04d75" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_d7094432-32d2-4d36-8b13-255b737d5575" xlink:to="loc_us-gaap_TreasuryStockMember_01a16fa2-0557-43cd-ae75-4193c9b04d75" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/SegmentInformation" xlink:type="simple" xlink:href="msa-20200630.xsd#SegmentInformation"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/SegmentInformation" xlink:type="extended" id="ic39fd12709254ae7aadf52b693d7a437_SegmentInformation"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/SegmentInformationTables" xlink:type="simple" xlink:href="msa-20200630.xsd#SegmentInformationTables"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/SegmentInformationTables" xlink:type="extended" id="i3da5ee55c0d245de8f48a3b6b6d699cb_SegmentInformationTables"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/SegmentInformationAdditionalInformationDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#SegmentInformationAdditionalInformationDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/SegmentInformationAdditionalInformationDetails" xlink:type="extended" id="ia530a5597ef94bd6ad46099dd4abe978_SegmentInformationAdditionalInformationDetails"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/SegmentInformationScheduleofReportableSegmentInformationDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#SegmentInformationScheduleofReportableSegmentInformationDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/SegmentInformationScheduleofReportableSegmentInformationDetails" xlink:type="extended" id="i4fbb981141874a37ae04262d83053430_SegmentInformationScheduleofReportableSegmentInformationDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_a4e4ab16-73dd-4e6e-8b90-49503ce043ef" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingInformationLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_94873720-880f-4d76-84e1-f548fe612a77" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a4e4ab16-73dd-4e6e-8b90-49503ce043ef" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_94873720-880f-4d76-84e1-f548fe612a77" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_e31e2589-e112-43d4-855b-a2a1eac3dddb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a4e4ab16-73dd-4e6e-8b90-49503ce043ef" xlink:to="loc_us-gaap_OperatingIncomeLoss_e31e2589-e112-43d4-855b-a2a1eac3dddb" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_c0d3637e-51ab-4015-a1e6-353fd34fb4bb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringCharges"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a4e4ab16-73dd-4e6e-8b90-49503ce043ef" xlink:to="loc_us-gaap_RestructuringCharges_c0d3637e-51ab-4015-a1e6-353fd34fb4bb" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_754feb48-53db-4d8d-a494-649f0be71a62" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a4e4ab16-73dd-4e6e-8b90-49503ce043ef" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_754feb48-53db-4d8d-a494-649f0be71a62" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_ProductLiabilityExpense_7a177ecd-28fc-418b-a3bd-5d7bd8644458" xlink:href="msa-20200630.xsd#msa_ProductLiabilityExpense"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a4e4ab16-73dd-4e6e-8b90-49503ce043ef" xlink:to="loc_msa_ProductLiabilityExpense_7a177ecd-28fc-418b-a3bd-5d7bd8644458" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_StrategicTransactionCosts_fbc5d4fc-744e-44af-84ea-0094152417c0" xlink:href="msa-20200630.xsd#msa_StrategicTransactionCosts"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a4e4ab16-73dd-4e6e-8b90-49503ce043ef" xlink:to="loc_msa_StrategicTransactionCosts_fbc5d4fc-744e-44af-84ea-0094152417c0" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_COVID19RelatedCosts_e06e884b-0e27-4f0e-b40b-ee23d4dd2804" xlink:href="msa-20200630.xsd#msa_COVID19RelatedCosts"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a4e4ab16-73dd-4e6e-8b90-49503ce043ef" xlink:to="loc_msa_COVID19RelatedCosts_e06e884b-0e27-4f0e-b40b-ee23d4dd2804" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_OperatingIncomeLossAdjusted_39bad253-3056-456d-9cdd-6ac88c49240c" xlink:href="msa-20200630.xsd#msa_OperatingIncomeLossAdjusted"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a4e4ab16-73dd-4e6e-8b90-49503ce043ef" xlink:to="loc_msa_OperatingIncomeLossAdjusted_39bad253-3056-456d-9cdd-6ac88c49240c" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_AdjustedOperatingMarginPercent_84857cbc-f21f-4759-bfeb-12139991822c" xlink:href="msa-20200630.xsd#msa_AdjustedOperatingMarginPercent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a4e4ab16-73dd-4e6e-8b90-49503ce043ef" xlink:to="loc_msa_AdjustedOperatingMarginPercent_84857cbc-f21f-4759-bfeb-12139991822c" xlink:type="arc" order="8"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_bdce958a-0742-4a62-a0a4-0137b727e62f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a4e4ab16-73dd-4e6e-8b90-49503ce043ef" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_bdce958a-0742-4a62-a0a4-0137b727e62f" xlink:type="arc" order="9"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_AdjustedEBITDA_b6377b8b-6478-4098-aaed-55bbada71a45" xlink:href="msa-20200630.xsd#msa_AdjustedEBITDA"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a4e4ab16-73dd-4e6e-8b90-49503ce043ef" xlink:to="loc_msa_AdjustedEBITDA_b6377b8b-6478-4098-aaed-55bbada71a45" xlink:type="arc" order="10"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_AdjustedEBITDAPercentage_27c0b9f4-a8fd-4c3e-922a-4a62c23fe9b2" xlink:href="msa-20200630.xsd#msa_AdjustedEBITDAPercentage"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a4e4ab16-73dd-4e6e-8b90-49503ce043ef" xlink:to="loc_msa_AdjustedEBITDAPercentage_27c0b9f4-a8fd-4c3e-922a-4a62c23fe9b2" xlink:type="arc" order="11"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_3b5f1dfa-db8e-462f-829f-8193478d57db" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a4e4ab16-73dd-4e6e-8b90-49503ce043ef" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_3b5f1dfa-db8e-462f-829f-8193478d57db" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_1ba61353-4bb8-403c-966e-eb508877c838" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_3b5f1dfa-db8e-462f-829f-8193478d57db" xlink:to="loc_srt_ConsolidationItemsAxis_1ba61353-4bb8-403c-966e-eb508877c838" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_1ba61353-4bb8-403c-966e-eb508877c838_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_1ba61353-4bb8-403c-966e-eb508877c838" xlink:to="loc_srt_ConsolidationItemsDomain_1ba61353-4bb8-403c-966e-eb508877c838_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_5449b6fb-95ee-4f39-8dd3-24c073f191cc" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_1ba61353-4bb8-403c-966e-eb508877c838" xlink:to="loc_srt_ConsolidationItemsDomain_5449b6fb-95ee-4f39-8dd3-24c073f191cc" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_f463a30a-c0d7-4cdd-a568-85cc3a86ce56" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_5449b6fb-95ee-4f39-8dd3-24c073f191cc" xlink:to="loc_us-gaap_OperatingSegmentsMember_f463a30a-c0d7-4cdd-a568-85cc3a86ce56" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_cc421729-f24a-4795-8760-1c5db39d2db1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_3b5f1dfa-db8e-462f-829f-8193478d57db" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_cc421729-f24a-4795-8760-1c5db39d2db1" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_cc421729-f24a-4795-8760-1c5db39d2db1_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_cc421729-f24a-4795-8760-1c5db39d2db1" xlink:to="loc_us-gaap_SegmentDomain_cc421729-f24a-4795-8760-1c5db39d2db1_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_fdbac477-db2e-42e6-b290-f02283d39122" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_cc421729-f24a-4795-8760-1c5db39d2db1" xlink:to="loc_us-gaap_SegmentDomain_fdbac477-db2e-42e6-b290-f02283d39122" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_AmericasMember_b5579414-9275-49e9-ba5d-15a48b2b9800" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_AmericasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_fdbac477-db2e-42e6-b290-f02283d39122" xlink:to="loc_srt_AmericasMember_b5579414-9275-49e9-ba5d-15a48b2b9800" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_InternationalSegmentMember_c9fdaef4-84e8-4063-b130-c99bbc7cf9d6" xlink:href="msa-20200630.xsd#msa_InternationalSegmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_fdbac477-db2e-42e6-b290-f02283d39122" xlink:to="loc_msa_InternationalSegmentMember_c9fdaef4-84e8-4063-b130-c99bbc7cf9d6" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateMember_483e5670-cc50-4873-8558-67f5013885da" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CorporateMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_fdbac477-db2e-42e6-b290-f02283d39122" xlink:to="loc_us-gaap_CorporateMember_483e5670-cc50-4873-8558-67f5013885da" xlink:type="arc" order="2"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/SegmentInformationPercentageofTotalSalesbyProductGroupDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#SegmentInformationPercentageofTotalSalesbyProductGroupDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/SegmentInformationPercentageofTotalSalesbyProductGroupDetails" xlink:type="extended" id="i7afda52da0014177bdf3f154a3b28aeb_SegmentInformationPercentageofTotalSalesbyProductGroupDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_ede0d94c-1a66-4c8f-8522-9f45e1a40fa2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9b035246-70d2-45ee-bf39-f92da85286a7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_ede0d94c-1a66-4c8f-8522-9f45e1a40fa2" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9b035246-70d2-45ee-bf39-f92da85286a7" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_d1f46f52-7117-4094-aa78-48cb7ff491ce" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskPercentage1"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_ede0d94c-1a66-4c8f-8522-9f45e1a40fa2" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_d1f46f52-7117-4094-aa78-48cb7ff491ce" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_05b2278a-7e8d-44df-99df-3759c30135e4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_ede0d94c-1a66-4c8f-8522-9f45e1a40fa2" xlink:to="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_05b2278a-7e8d-44df-99df-3759c30135e4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_48890965-9c34-4d7d-b449-191fa1ae572f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_05b2278a-7e8d-44df-99df-3759c30135e4" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_48890965-9c34-4d7d-b449-191fa1ae572f" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_48890965-9c34-4d7d-b449-191fa1ae572f_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_48890965-9c34-4d7d-b449-191fa1ae572f" xlink:to="loc_us-gaap_SegmentDomain_48890965-9c34-4d7d-b449-191fa1ae572f_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_a06f23b6-632f-4afa-b240-bd356bae69da" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_48890965-9c34-4d7d-b449-191fa1ae572f" xlink:to="loc_us-gaap_SegmentDomain_a06f23b6-632f-4afa-b240-bd356bae69da" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_AmericasMember_fde358bb-04ad-420c-aba4-d78c5d118345" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_AmericasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a06f23b6-632f-4afa-b240-bd356bae69da" xlink:to="loc_srt_AmericasMember_fde358bb-04ad-420c-aba4-d78c5d118345" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_InternationalMember_19a2b583-86f3-4753-9829-430066c8bf5d" xlink:href="msa-20200630.xsd#msa_InternationalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a06f23b6-632f-4afa-b240-bd356bae69da" xlink:to="loc_msa_InternationalMember_19a2b583-86f3-4753-9829-430066c8bf5d" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_5b1ab661-652f-4bad-aca6-3626a4ba3f2f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_05b2278a-7e8d-44df-99df-3759c30135e4" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_5b1ab661-652f-4bad-aca6-3626a4ba3f2f" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_5b1ab661-652f-4bad-aca6-3626a4ba3f2f_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_5b1ab661-652f-4bad-aca6-3626a4ba3f2f" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_5b1ab661-652f-4bad-aca6-3626a4ba3f2f_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_87500454-c22a-44a1-b406-fb8474a458fd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_5b1ab661-652f-4bad-aca6-3626a4ba3f2f" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_87500454-c22a-44a1-b406-fb8474a458fd" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesMember_1f48c196-6703-422d-849e-aceb0038b97a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SalesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_87500454-c22a-44a1-b406-fb8474a458fd" xlink:to="loc_us-gaap_SalesMember_1f48c196-6703-422d-849e-aceb0038b97a" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_7ae471f8-114e-4a03-9a89-351f6ab5fdf9" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductOrServiceAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_05b2278a-7e8d-44df-99df-3759c30135e4" xlink:to="loc_srt_ProductOrServiceAxis_7ae471f8-114e-4a03-9a89-351f6ab5fdf9" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_7ae471f8-114e-4a03-9a89-351f6ab5fdf9_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_7ae471f8-114e-4a03-9a89-351f6ab5fdf9" xlink:to="loc_srt_ProductsAndServicesDomain_7ae471f8-114e-4a03-9a89-351f6ab5fdf9_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_91f0f692-dde8-4442-aa40-b134e2b3bd38" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_7ae471f8-114e-4a03-9a89-351f6ab5fdf9" xlink:to="loc_srt_ProductsAndServicesDomain_91f0f692-dde8-4442-aa40-b134e2b3bd38" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_BreathingApparatusMember_2685ee01-e8bb-4d5f-9b51-cae67da54c38" xlink:href="msa-20200630.xsd#msa_BreathingApparatusMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_91f0f692-dde8-4442-aa40-b134e2b3bd38" xlink:to="loc_msa_BreathingApparatusMember_2685ee01-e8bb-4d5f-9b51-cae67da54c38" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_FixGasFlameDetectionInstrumentsMember_03bba693-c101-4606-af5d-7ff453d85aff" xlink:href="msa-20200630.xsd#msa_FixGasFlameDetectionInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_91f0f692-dde8-4442-aa40-b134e2b3bd38" xlink:to="loc_msa_FixGasFlameDetectionInstrumentsMember_03bba693-c101-4606-af5d-7ff453d85aff" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_FirefighterHelmetsandProtectiveApparelMember_11ab54a1-0339-44c4-9fa7-a08b3e22d273" xlink:href="msa-20200630.xsd#msa_FirefighterHelmetsandProtectiveApparelMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_91f0f692-dde8-4442-aa40-b134e2b3bd38" xlink:to="loc_msa_FirefighterHelmetsandProtectiveApparelMember_11ab54a1-0339-44c4-9fa7-a08b3e22d273" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_PortableInstrumentsMember_29e6969f-fd19-440d-bd01-159afbf4f96f" xlink:href="msa-20200630.xsd#msa_PortableInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_91f0f692-dde8-4442-aa40-b134e2b3bd38" xlink:to="loc_msa_PortableInstrumentsMember_29e6969f-fd19-440d-bd01-159afbf4f96f" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_HeadProtectionMember_c331ac60-e3ba-4ab6-828a-4e414c55b498" xlink:href="msa-20200630.xsd#msa_HeadProtectionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_91f0f692-dde8-4442-aa40-b134e2b3bd38" xlink:to="loc_msa_HeadProtectionMember_c331ac60-e3ba-4ab6-828a-4e414c55b498" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_FallProtectionMember_45f0206f-3ed0-4e9d-9820-06281986df7e" xlink:href="msa-20200630.xsd#msa_FallProtectionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_91f0f692-dde8-4442-aa40-b134e2b3bd38" xlink:to="loc_msa_FallProtectionMember_45f0206f-3ed0-4e9d-9820-06281986df7e" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_OtherProductsMember_435e87ab-28bf-4271-88de-0c9737058de0" xlink:href="msa-20200630.xsd#msa_OtherProductsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_91f0f692-dde8-4442-aa40-b134e2b3bd38" xlink:to="loc_msa_OtherProductsMember_435e87ab-28bf-4271-88de-0c9737058de0" xlink:type="arc" order="6"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/EarningsperShare" xlink:type="simple" xlink:href="msa-20200630.xsd#EarningsperShare"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/EarningsperShare" xlink:type="extended" id="icd2d129eb22d47078e8014728925a934_EarningsperShare"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/EarningsperShareTables" xlink:type="simple" xlink:href="msa-20200630.xsd#EarningsperShareTables"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/EarningsperShareTables" xlink:type="extended" id="icb4fcb412ab94722a8b9ba40c7f48f9c_EarningsperShareTables"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/EarningsperShareDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#EarningsperShareDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/EarningsperShareDetails" xlink:type="extended" id="ib64d29b268124217903157b6ee23dedd_EarningsperShareDetails"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/IncomeTaxes" xlink:type="simple" xlink:href="msa-20200630.xsd#IncomeTaxes"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/IncomeTaxes" xlink:type="extended" id="i032a2851cd344ff691c3cbf1f8315d2f_IncomeTaxes"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/IncomeTaxesDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#IncomeTaxesDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/IncomeTaxesDetails" xlink:type="extended" id="i8671a333f271410b9c5163e176c8ab76_IncomeTaxesDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxContingencyLineItems_f0872283-8bcb-40df-a1d4-58a2f105e056" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxContingencyLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_fae54a67-3275-43f9-b6a7-1463a6ae1823" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_f0872283-8bcb-40df-a1d4-58a2f105e056" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_fae54a67-3275-43f9-b6a7-1463a6ae1823" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefits_e98729b3-6739-4a2a-81bb-b574b6e5c48e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnrecognizedTaxBenefits"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_f0872283-8bcb-40df-a1d4-58a2f105e056" xlink:to="loc_us-gaap_UnrecognizedTaxBenefits_e98729b3-6739-4a2a-81bb-b574b6e5c48e" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_d4fc63a9-cc52-48d5-9f83-34162e38e9e3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssetsNoncurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_f0872283-8bcb-40df-a1d4-58a2f105e056" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_d4fc63a9-cc52-48d5-9f83-34162e38e9e3" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_18bfbd82-0d24-46e0-b220-38132aac9e7d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_f0872283-8bcb-40df-a1d4-58a2f105e056" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_18bfbd82-0d24-46e0-b220-38132aac9e7d" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxContingencyTable_3f6e01b1-2a33-4413-a5df-94db94eac070" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxContingencyTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_f0872283-8bcb-40df-a1d4-58a2f105e056" xlink:to="loc_us-gaap_IncomeTaxContingencyTable_3f6e01b1-2a33-4413-a5df-94db94eac070" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_ca3e4195-f71f-47c6-ab82-220ccccac495" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxContingencyTable_3f6e01b1-2a33-4413-a5df-94db94eac070" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_ca3e4195-f71f-47c6-ab82-220ccccac495" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_ca3e4195-f71f-47c6-ab82-220ccccac495_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_ca3e4195-f71f-47c6-ab82-220ccccac495" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_ca3e4195-f71f-47c6-ab82-220ccccac495_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_9cdbaed4-99a6-4d11-b92f-6a8be3bd4ac0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_ca3e4195-f71f-47c6-ab82-220ccccac495" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_9cdbaed4-99a6-4d11-b92f-6a8be3bd4ac0" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_7674e75c-cfc3-490c-8ffb-904af9f1bc86" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNoncurrentLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_9cdbaed4-99a6-4d11-b92f-6a8be3bd4ac0" xlink:to="loc_us-gaap_OtherNoncurrentLiabilitiesMember_7674e75c-cfc3-490c-8ffb-904af9f1bc86" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_DeferredTaxAssetMember_bd982c65-1461-43db-81b3-6bfc0904c18e" xlink:href="msa-20200630.xsd#msa_DeferredTaxAssetMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_9cdbaed4-99a6-4d11-b92f-6a8be3bd4ac0" xlink:to="loc_msa_DeferredTaxAssetMember_bd982c65-1461-43db-81b3-6bfc0904c18e" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/StockPlans" xlink:type="simple" xlink:href="msa-20200630.xsd#StockPlans"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/StockPlans" xlink:type="extended" id="idd06b0b21eb445549a15e24d32a9e0c9_StockPlans"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/StockPlansTables" xlink:type="simple" xlink:href="msa-20200630.xsd#StockPlansTables"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/StockPlansTables" xlink:type="extended" id="ice24afe83a974b47a77a64746c482735_StockPlansTables"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/StockPlansScheduleofStockCompensationExpenseDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#StockPlansScheduleofStockCompensationExpenseDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/StockPlansScheduleofStockCompensationExpenseDetails" xlink:type="extended" id="i5e2f3539f2874366abe72c95f3ea9585_StockPlansScheduleofStockCompensationExpenseDetails"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/StockPlansAdditionalInformationDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#StockPlansAdditionalInformationDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/StockPlansAdditionalInformationDetails" xlink:type="extended" id="ia09c32f01dbd492d96b965a24ffd4f40_StockPlansAdditionalInformationDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a7afed2f-83a1-4204-83cf-02fd657ec849" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_c89550d7-eb1b-4c57-9bd2-c6da0bb5b749" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a7afed2f-83a1-4204-83cf-02fd657ec849" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_c89550d7-eb1b-4c57-9bd2-c6da0bb5b749" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_PercentageOfTargetAwardBasedOnAchievingTargetedTotalShareholderReturnBasedOnWhichFinalNumberOfSharesToBeIssuedForPerformanceStockUnits_93010553-f5f1-48c7-a48a-5a7b424ce1ab" xlink:href="msa-20200630.xsd#msa_PercentageOfTargetAwardBasedOnAchievingTargetedTotalShareholderReturnBasedOnWhichFinalNumberOfSharesToBeIssuedForPerformanceStockUnits"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a7afed2f-83a1-4204-83cf-02fd657ec849" xlink:to="loc_msa_PercentageOfTargetAwardBasedOnAchievingTargetedTotalShareholderReturnBasedOnWhichFinalNumberOfSharesToBeIssuedForPerformanceStockUnits_93010553-f5f1-48c7-a48a-5a7b424ce1ab" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_SharebasedCompensationArrangementbySharebasePaymentAwardFairValueAssumptionsAverageClosingPriceUsedtoCalculateExpectedDividendRatePeriod_d74ec5e3-c96a-4740-a640-748960681147" xlink:href="msa-20200630.xsd#msa_SharebasedCompensationArrangementbySharebasePaymentAwardFairValueAssumptionsAverageClosingPriceUsedtoCalculateExpectedDividendRatePeriod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a7afed2f-83a1-4204-83cf-02fd657ec849" xlink:to="loc_msa_SharebasedCompensationArrangementbySharebasePaymentAwardFairValueAssumptionsAverageClosingPriceUsedtoCalculateExpectedDividendRatePeriod_d74ec5e3-c96a-4740-a640-748960681147" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_SharebasedCompensationArrangementbySharebasePaymentAwardFairValueAssumptionsStockBetaDailyPriceDataPeriod_04650d9d-cef3-4595-b99d-7244006e04b9" xlink:href="msa-20200630.xsd#msa_SharebasedCompensationArrangementbySharebasePaymentAwardFairValueAssumptionsStockBetaDailyPriceDataPeriod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a7afed2f-83a1-4204-83cf-02fd657ec849" xlink:to="loc_msa_SharebasedCompensationArrangementbySharebasePaymentAwardFairValueAssumptionsStockBetaDailyPriceDataPeriod_04650d9d-cef3-4595-b99d-7244006e04b9" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_PercentageOfTargetAwardBasedOnAchievingTargetedReturnOnNetAssetsBasedOnWhichFinalNumberOfSharesToBeIssuedForPerformanceStockUnits_c36c67df-3e5f-4db0-a5a8-919fc1b2fd96" xlink:href="msa-20200630.xsd#msa_PercentageOfTargetAwardBasedOnAchievingTargetedReturnOnNetAssetsBasedOnWhichFinalNumberOfSharesToBeIssuedForPerformanceStockUnits"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a7afed2f-83a1-4204-83cf-02fd657ec849" xlink:to="loc_msa_PercentageOfTargetAwardBasedOnAchievingTargetedReturnOnNetAssetsBasedOnWhichFinalNumberOfSharesToBeIssuedForPerformanceStockUnits_c36c67df-3e5f-4db0-a5a8-919fc1b2fd96" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_44c08e93-b9e4-470a-ac03-fb6109b5d381" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a7afed2f-83a1-4204-83cf-02fd657ec849" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_44c08e93-b9e4-470a-ac03-fb6109b5d381" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_05474a17-8f8a-478a-99d8-2ae9373841c2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_44c08e93-b9e4-470a-ac03-fb6109b5d381" xlink:to="loc_us-gaap_AwardTypeAxis_05474a17-8f8a-478a-99d8-2ae9373841c2" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_05474a17-8f8a-478a-99d8-2ae9373841c2_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_05474a17-8f8a-478a-99d8-2ae9373841c2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_05474a17-8f8a-478a-99d8-2ae9373841c2_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8c4d1f38-0343-4327-9671-b7c3c83e4b9d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_05474a17-8f8a-478a-99d8-2ae9373841c2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8c4d1f38-0343-4327-9671-b7c3c83e4b9d" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_cd289a59-cd7f-41dc-b000-fd77d35b0e98" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PerformanceSharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8c4d1f38-0343-4327-9671-b7c3c83e4b9d" xlink:to="loc_us-gaap_PerformanceSharesMember_cd289a59-cd7f-41dc-b000-fd77d35b0e98" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_5cad643d-c8cf-4fce-83be-94cb2f2f65ff" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_44c08e93-b9e4-470a-ac03-fb6109b5d381" xlink:to="loc_srt_RangeAxis_5cad643d-c8cf-4fce-83be-94cb2f2f65ff" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_5cad643d-c8cf-4fce-83be-94cb2f2f65ff_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_5cad643d-c8cf-4fce-83be-94cb2f2f65ff" xlink:to="loc_srt_RangeMember_5cad643d-c8cf-4fce-83be-94cb2f2f65ff_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_bf9eea3c-f0c6-4d20-a0f1-27860e947583" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_5cad643d-c8cf-4fce-83be-94cb2f2f65ff" xlink:to="loc_srt_RangeMember_bf9eea3c-f0c6-4d20-a0f1-27860e947583" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_326ead11-b6d0-4d0e-a610-40d93d70d550" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_bf9eea3c-f0c6-4d20-a0f1-27860e947583" xlink:to="loc_srt_MinimumMember_326ead11-b6d0-4d0e-a610-40d93d70d550" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_314c6e2c-5ee0-43f4-8922-095d9246e2f2" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_bf9eea3c-f0c6-4d20-a0f1-27860e947583" xlink:to="loc_srt_MaximumMember_314c6e2c-5ee0-43f4-8922-095d9246e2f2" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/StockPlansWeightedAverageRiskAssumptionsDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#StockPlansWeightedAverageRiskAssumptionsDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/StockPlansWeightedAverageRiskAssumptionsDetails" xlink:type="extended" id="ie25be52de79b4bd79fe41e3f5fae8fba_StockPlansWeightedAverageRiskAssumptionsDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3e632460-f245-48eb-9ee9-d862847548cd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_7df2cf5b-9202-4f74-bc56-b2135fb25c81" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3e632460-f245-48eb-9ee9-d862847548cd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_7df2cf5b-9202-4f74-bc56-b2135fb25c81" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_0fc6a86e-f4c9-438c-9634-bb61fddf0ad6" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3e632460-f245-48eb-9ee9-d862847548cd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_0fc6a86e-f4c9-438c-9634-bb61fddf0ad6" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_6c85e40f-fa3a-4a0c-befd-b2a4e584bf7a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3e632460-f245-48eb-9ee9-d862847548cd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_6c85e40f-fa3a-4a0c-befd-b2a4e584bf7a" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_7871b022-ce9f-4eaa-bf4b-d74ffe2ff1ce" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3e632460-f245-48eb-9ee9-d862847548cd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_7871b022-ce9f-4eaa-bf4b-d74ffe2ff1ce" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_SharebasedCompensationArrangementbySharebasedPaymentAwardFairValueAssumptionsStockBeta_8dc3b253-6d0d-4af0-8091-a139fb7e1e4b" xlink:href="msa-20200630.xsd#msa_SharebasedCompensationArrangementbySharebasedPaymentAwardFairValueAssumptionsStockBeta"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3e632460-f245-48eb-9ee9-d862847548cd" xlink:to="loc_msa_SharebasedCompensationArrangementbySharebasedPaymentAwardFairValueAssumptionsStockBeta_8dc3b253-6d0d-4af0-8091-a139fb7e1e4b" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fe8e1b66-9729-4f1b-8b3a-093dbc498a9c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3e632460-f245-48eb-9ee9-d862847548cd" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fe8e1b66-9729-4f1b-8b3a-093dbc498a9c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueAxis_7ead66ff-1ca5-478c-9c23-1b804e73137d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ValuationTechniqueAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fe8e1b66-9729-4f1b-8b3a-093dbc498a9c" xlink:to="loc_us-gaap_ValuationTechniqueAxis_7ead66ff-1ca5-478c-9c23-1b804e73137d" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_7ead66ff-1ca5-478c-9c23-1b804e73137d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ValuationTechniqueDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationTechniqueAxis_7ead66ff-1ca5-478c-9c23-1b804e73137d" xlink:to="loc_us-gaap_ValuationTechniqueDomain_7ead66ff-1ca5-478c-9c23-1b804e73137d_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_c6a3906b-24eb-4091-9f95-cebd30239324" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ValuationTechniqueDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationTechniqueAxis_7ead66ff-1ca5-478c-9c23-1b804e73137d" xlink:to="loc_us-gaap_ValuationTechniqueDomain_c6a3906b-24eb-4091-9f95-cebd30239324" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_MonteCarloApproachMember_12c465a9-f290-4756-b185-825e0390e3a2" xlink:href="msa-20200630.xsd#msa_MonteCarloApproachMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_c6a3906b-24eb-4091-9f95-cebd30239324" xlink:to="loc_msa_MonteCarloApproachMember_12c465a9-f290-4756-b185-825e0390e3a2" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_fb19ec94-4536-4d44-876f-8c35a6e3706f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fe8e1b66-9729-4f1b-8b3a-093dbc498a9c" xlink:to="loc_us-gaap_AwardTypeAxis_fb19ec94-4536-4d44-876f-8c35a6e3706f" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_fb19ec94-4536-4d44-876f-8c35a6e3706f_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_fb19ec94-4536-4d44-876f-8c35a6e3706f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_fb19ec94-4536-4d44-876f-8c35a6e3706f_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2dff7c5a-0f8a-49b1-9f46-b5b875db3b74" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_fb19ec94-4536-4d44-876f-8c35a6e3706f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2dff7c5a-0f8a-49b1-9f46-b5b875db3b74" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_a8aa4f2f-320d-45a5-9239-4b1252d33f5c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeStockOptionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2dff7c5a-0f8a-49b1-9f46-b5b875db3b74" xlink:to="loc_us-gaap_EmployeeStockOptionMember_a8aa4f2f-320d-45a5-9239-4b1252d33f5c" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_fcd0a865-5231-4f4d-9965-d89e25e80eed" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PerformanceSharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2dff7c5a-0f8a-49b1-9f46-b5b875db3b74" xlink:to="loc_us-gaap_PerformanceSharesMember_fcd0a865-5231-4f4d-9965-d89e25e80eed" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/StockPlansSummaryofStockOptionActivityDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#StockPlansSummaryofStockOptionActivityDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/StockPlansSummaryofStockOptionActivityDetails" xlink:type="extended" id="i4259e0eef2ff46aa95071d023d196dbf_StockPlansSummaryofStockOptionActivityDetails"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/StockPlansSummaryofRestrictedStockandUnitActivityDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#StockPlansSummaryofRestrictedStockandUnitActivityDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/StockPlansSummaryofRestrictedStockandUnitActivityDetails" xlink:type="extended" id="i5f6cf6c6c3244c3c92628b073c08b2e4_StockPlansSummaryofRestrictedStockandUnitActivityDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8572b440-c831-445f-9f9d-5eed76d6fee2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_a814b520-ff02-4083-b1ce-4231f96eb02d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8572b440-c831-445f-9f9d-5eed76d6fee2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_a814b520-ff02-4083-b1ce-4231f96eb02d" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_6dbc14e3-2c12-4006-b418-be27999e5284" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_a814b520-ff02-4083-b1ce-4231f96eb02d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_6dbc14e3-2c12-4006-b418-be27999e5284" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_a50bef81-988b-4854-ab12-0ad36b02a222" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_a814b520-ff02-4083-b1ce-4231f96eb02d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_a50bef81-988b-4854-ab12-0ad36b02a222" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_97143b31-25c0-4ab4-84cd-756a251308d8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_a814b520-ff02-4083-b1ce-4231f96eb02d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_97143b31-25c0-4ab4-84cd-756a251308d8" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_2498b0c0-e42a-4afb-8e82-710b8c70698d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_a814b520-ff02-4083-b1ce-4231f96eb02d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_2498b0c0-e42a-4afb-8e82-710b8c70698d" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_3d11459f-9679-4ba6-9fb4-cea0afb2593c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_a3cb243e-496d-492c-b113-2f60a3e1ee8a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8572b440-c831-445f-9f9d-5eed76d6fee2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_a3cb243e-496d-492c-b113-2f60a3e1ee8a" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_2a7f5165-6327-44f7-bd25-179bcc43a1d0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_a3cb243e-496d-492c-b113-2f60a3e1ee8a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_2a7f5165-6327-44f7-bd25-179bcc43a1d0" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_889b6c74-7db4-4e24-a28f-c64b4f00850a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_a3cb243e-496d-492c-b113-2f60a3e1ee8a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_889b6c74-7db4-4e24-a28f-c64b4f00850a" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_af0a8757-46b3-47b7-825f-93dbb69fd445" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_a3cb243e-496d-492c-b113-2f60a3e1ee8a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_af0a8757-46b3-47b7-825f-93dbb69fd445" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_87ac36e8-fefa-45d4-ae3c-b7685eff1fef" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_a3cb243e-496d-492c-b113-2f60a3e1ee8a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_87ac36e8-fefa-45d4-ae3c-b7685eff1fef" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_a216bcc9-d6bc-49b7-9cf0-b0671eba3c84" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9916d45a-ffbf-41bb-b002-206806d53c75" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8572b440-c831-445f-9f9d-5eed76d6fee2" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9916d45a-ffbf-41bb-b002-206806d53c75" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_4ec71d6a-69f8-4548-a480-c6ddb32b6549" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9916d45a-ffbf-41bb-b002-206806d53c75" xlink:to="loc_us-gaap_AwardTypeAxis_4ec71d6a-69f8-4548-a480-c6ddb32b6549" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4ec71d6a-69f8-4548-a480-c6ddb32b6549_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_4ec71d6a-69f8-4548-a480-c6ddb32b6549" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4ec71d6a-69f8-4548-a480-c6ddb32b6549_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3d92b5bc-d52c-4ca7-9a5c-14ed0d38611b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_4ec71d6a-69f8-4548-a480-c6ddb32b6549" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3d92b5bc-d52c-4ca7-9a5c-14ed0d38611b" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_de41e14c-160f-475e-9ab0-d5f06a4d0f51" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PerformanceSharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3d92b5bc-d52c-4ca7-9a5c-14ed0d38611b" xlink:to="loc_us-gaap_PerformanceSharesMember_de41e14c-160f-475e-9ab0-d5f06a4d0f51" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_b80acb1e-891c-46bb-b8f0-0f861b0ff676" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedStockMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3d92b5bc-d52c-4ca7-9a5c-14ed0d38611b" xlink:to="loc_us-gaap_RestrictedStockMember_b80acb1e-891c-46bb-b8f0-0f861b0ff676" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/StockPlansSummaryofPerformanceStockUnitActivityDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#StockPlansSummaryofPerformanceStockUnitActivityDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/StockPlansSummaryofPerformanceStockUnitActivityDetails" xlink:type="extended" id="ic4c583ba37424519acf470ffcbff0488_StockPlansSummaryofPerformanceStockUnitActivityDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_264cc5b1-a429-4b19-96d9-8062d1e58cb4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_0fa53904-ebcf-4af4-a2f1-13ab0e51b3d1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_264cc5b1-a429-4b19-96d9-8062d1e58cb4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_0fa53904-ebcf-4af4-a2f1-13ab0e51b3d1" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_6d34396f-a82e-4f67-a2ad-2335141f9d10" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_0fa53904-ebcf-4af4-a2f1-13ab0e51b3d1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_6d34396f-a82e-4f67-a2ad-2335141f9d10" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_345f4fa0-a852-4456-9b4b-169783c925d8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_0fa53904-ebcf-4af4-a2f1-13ab0e51b3d1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_345f4fa0-a852-4456-9b4b-169783c925d8" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceAdjustmentInPeriod_37a1d3d7-cc23-4567-add3-0901d9a85d30" xlink:href="msa-20200630.xsd#msa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceAdjustmentInPeriod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_0fa53904-ebcf-4af4-a2f1-13ab0e51b3d1" xlink:to="loc_msa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceAdjustmentInPeriod_37a1d3d7-cc23-4567-add3-0901d9a85d30" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_192a77d1-d111-4bdb-9af2-df10dd2d2e6e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_0fa53904-ebcf-4af4-a2f1-13ab0e51b3d1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_192a77d1-d111-4bdb-9af2-df10dd2d2e6e" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_955f10a1-66df-46e0-8ee4-7138c87f869e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_6c7d2940-7c9b-4782-b65c-f4ed60baa3c8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_264cc5b1-a429-4b19-96d9-8062d1e58cb4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_6c7d2940-7c9b-4782-b65c-f4ed60baa3c8" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_d7e18d1c-27f3-4a73-97cc-938c0c23de20" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_6c7d2940-7c9b-4782-b65c-f4ed60baa3c8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_d7e18d1c-27f3-4a73-97cc-938c0c23de20" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_21483a39-1456-4199-bf29-6c5c78189c5f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_6c7d2940-7c9b-4782-b65c-f4ed60baa3c8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_21483a39-1456-4199-bf29-6c5c78189c5f" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceAdjustmentInPeriodWeightedAverageGrantDateFairValue_8932e6fd-65e3-4769-bbeb-d1b3102978d4" xlink:href="msa-20200630.xsd#msa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceAdjustmentInPeriodWeightedAverageGrantDateFairValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_6c7d2940-7c9b-4782-b65c-f4ed60baa3c8" xlink:to="loc_msa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceAdjustmentInPeriodWeightedAverageGrantDateFairValue_8932e6fd-65e3-4769-bbeb-d1b3102978d4" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_a26daa09-cd7e-4ad0-bc36-7948effefcf9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_6c7d2940-7c9b-4782-b65c-f4ed60baa3c8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_a26daa09-cd7e-4ad0-bc36-7948effefcf9" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_23a2d108-83c5-4691-a2e0-7cc2b4453768" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_eaeabb52-7f83-4869-b25a-9673dd355d21" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_264cc5b1-a429-4b19-96d9-8062d1e58cb4" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_eaeabb52-7f83-4869-b25a-9673dd355d21" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_a6fa575d-81b1-4c40-a3d7-3c2de4510028" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_eaeabb52-7f83-4869-b25a-9673dd355d21" xlink:to="loc_us-gaap_AwardTypeAxis_a6fa575d-81b1-4c40-a3d7-3c2de4510028" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a6fa575d-81b1-4c40-a3d7-3c2de4510028_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_a6fa575d-81b1-4c40-a3d7-3c2de4510028" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a6fa575d-81b1-4c40-a3d7-3c2de4510028_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0f9b727a-da7a-4f5a-bb9e-12fd6ab08fbb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_a6fa575d-81b1-4c40-a3d7-3c2de4510028" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0f9b727a-da7a-4f5a-bb9e-12fd6ab08fbb" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_641cfcc2-47cf-49f4-b66b-de0f9ac1953b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PerformanceSharesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0f9b727a-da7a-4f5a-bb9e-12fd6ab08fbb" xlink:to="loc_us-gaap_PerformanceSharesMember_641cfcc2-47cf-49f4-b66b-de0f9ac1953b" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/LongTermDebt" xlink:type="simple" xlink:href="msa-20200630.xsd#LongTermDebt"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/LongTermDebt" xlink:type="extended" id="i843252bfd311471d896f92c753e440d4_LongTermDebt"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/LongTermDebtTables" xlink:type="simple" xlink:href="msa-20200630.xsd#LongTermDebtTables"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/LongTermDebtTables" xlink:type="extended" id="i584198f50a074d7a86e4c6890f157679_LongTermDebtTables"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/LongTermDebtScheduleofDebtDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#LongTermDebtScheduleofDebtDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/LongTermDebtScheduleofDebtDetails" xlink:type="extended" id="iafd70dbcabec43a8a80c7a97bff60cc7_LongTermDebtScheduleofDebtDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_23d61b62-adbe-486c-8784-6b17f5b80bc2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorLongTermNotes_41bd7545-42c1-4350-b9cd-e802dfb9c576" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SeniorLongTermNotes"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_23d61b62-adbe-486c-8784-6b17f5b80bc2" xlink:to="loc_us-gaap_SeniorLongTermNotes_41bd7545-42c1-4350-b9cd-e802dfb9c576" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_b3b29b0a-87f4-4bb6-ba1c-c8301689a504" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCredit"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_23d61b62-adbe-486c-8784-6b17f5b80bc2" xlink:to="loc_us-gaap_LineOfCredit_b3b29b0a-87f4-4bb6-ba1c-c8301689a504" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_71a17696-f6ae-4f9d-ac08-abe3423e0965" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebt"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_23d61b62-adbe-486c-8784-6b17f5b80bc2" xlink:to="loc_us-gaap_LongTermDebt_71a17696-f6ae-4f9d-ac08-abe3423e0965" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_cd0afad2-736a-4973-8c78-6093a7f4f528" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtCurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_23d61b62-adbe-486c-8784-6b17f5b80bc2" xlink:to="loc_us-gaap_LongTermDebtCurrent_cd0afad2-736a-4973-8c78-6093a7f4f528" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_f6ebc4a6-477c-4e76-8312-a98c9c86050a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtNoncurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_23d61b62-adbe-486c-8784-6b17f5b80bc2" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_f6ebc4a6-477c-4e76-8312-a98c9c86050a" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_c83dd7fa-6932-4459-8bfe-302740153f98" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_23d61b62-adbe-486c-8784-6b17f5b80bc2" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_c83dd7fa-6932-4459-8bfe-302740153f98" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_936b8450-becf-4ab1-a729-db55101d617a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_23d61b62-adbe-486c-8784-6b17f5b80bc2" xlink:to="loc_us-gaap_DebtInstrumentTable_936b8450-becf-4ab1-a729-db55101d617a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_d0ca3cba-331e-470e-9287-f07db56a00ae" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_936b8450-becf-4ab1-a729-db55101d617a" xlink:to="loc_us-gaap_DebtInstrumentAxis_d0ca3cba-331e-470e-9287-f07db56a00ae" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_d0ca3cba-331e-470e-9287-f07db56a00ae_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_d0ca3cba-331e-470e-9287-f07db56a00ae" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_d0ca3cba-331e-470e-9287-f07db56a00ae_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_a06b3fb3-0fa4-4fa5-b57f-91a8872e4822" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_d0ca3cba-331e-470e-9287-f07db56a00ae" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_a06b3fb3-0fa4-4fa5-b57f-91a8872e4822" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_SeniorNotesPayableThroughTwoThousandTwentyOneFourPointZeroZeroPercentageMember_c9f64020-a0f2-4031-a220-ec01fffb5ac4" xlink:href="msa-20200630.xsd#msa_SeniorNotesPayableThroughTwoThousandTwentyOneFourPointZeroZeroPercentageMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a06b3fb3-0fa4-4fa5-b57f-91a8872e4822" xlink:to="loc_msa_SeniorNotesPayableThroughTwoThousandTwentyOneFourPointZeroZeroPercentageMember_c9f64020-a0f2-4031-a220-ec01fffb5ac4" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_SeniorNotesPayableThroughTwoThousandThirtyOneThreePointFourPercentageMemberMember_9965a93b-0bfa-42b8-8818-b626fc91f824" xlink:href="msa-20200630.xsd#msa_SeniorNotesPayableThroughTwoThousandThirtyOneThreePointFourPercentageMemberMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a06b3fb3-0fa4-4fa5-b57f-91a8872e4822" xlink:to="loc_msa_SeniorNotesPayableThroughTwoThousandThirtyOneThreePointFourPercentageMemberMember_9965a93b-0bfa-42b8-8818-b626fc91f824" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/LongTermDebtAdditionalInformationDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#LongTermDebtAdditionalInformationDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/LongTermDebtAdditionalInformationDetails" xlink:type="extended" id="i497eabef49dd48ab9b6ff559816befa2_LongTermDebtAdditionalInformationDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_3cdfc5df-0c47-44c7-a6d8-f05571a9a1b3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_73249bef-9da3-4bdf-934c-262c0ec67b7f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3cdfc5df-0c47-44c7-a6d8-f05571a9a1b3" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_73249bef-9da3-4bdf-934c-262c0ec67b7f" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_6a367559-2ba9-4bcf-92d7-0672b74ef339" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3cdfc5df-0c47-44c7-a6d8-f05571a9a1b3" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_6a367559-2ba9-4bcf-92d7-0672b74ef339" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_16bb8ae7-81cd-4720-baff-35c733d4bd6f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityInterestRateDuringPeriod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3cdfc5df-0c47-44c7-a6d8-f05571a9a1b3" xlink:to="loc_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_16bb8ae7-81cd-4720-baff-35c733d4bd6f" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_05481696-cc13-4d8f-a7b1-024d9ae54cd5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3cdfc5df-0c47-44c7-a6d8-f05571a9a1b3" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_05481696-cc13-4d8f-a7b1-024d9ae54cd5" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_LineOfCreditFacilityAccordionFeatureAmount_71945b09-a54f-4494-a9bf-693a571e86b8" xlink:href="msa-20200630.xsd#msa_LineOfCreditFacilityAccordionFeatureAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3cdfc5df-0c47-44c7-a6d8-f05571a9a1b3" xlink:to="loc_msa_LineOfCreditFacilityAccordionFeatureAmount_71945b09-a54f-4494-a9bf-693a571e86b8" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_eb61ff83-f111-4dd8-8fba-0d22fce4d2c8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3cdfc5df-0c47-44c7-a6d8-f05571a9a1b3" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_eb61ff83-f111-4dd8-8fba-0d22fce4d2c8" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentPeriodicPayment_b44edbe7-9afd-4456-91f8-bff6ac44ca82" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentPeriodicPayment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3cdfc5df-0c47-44c7-a6d8-f05571a9a1b3" xlink:to="loc_us-gaap_DebtInstrumentPeriodicPayment_b44edbe7-9afd-4456-91f8-bff6ac44ca82" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_420bd693-b880-4733-b435-5248cb9f155d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3cdfc5df-0c47-44c7-a6d8-f05571a9a1b3" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_420bd693-b880-4733-b435-5248cb9f155d" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_c5da2457-874d-4421-a430-5936f9b200c8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentTerm"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3cdfc5df-0c47-44c7-a6d8-f05571a9a1b3" xlink:to="loc_us-gaap_DebtInstrumentTerm_c5da2457-874d-4421-a430-5936f9b200c8" xlink:type="arc" order="8"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_AdditionalSeniorNotesAvailableforRequest_9ad9d4b4-a130-4c0c-8337-6e380e281d1f" xlink:href="msa-20200630.xsd#msa_AdditionalSeniorNotesAvailableforRequest"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3cdfc5df-0c47-44c7-a6d8-f05571a9a1b3" xlink:to="loc_msa_AdditionalSeniorNotesAvailableforRequest_9ad9d4b4-a130-4c0c-8337-6e380e281d1f" xlink:type="arc" order="9"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorLongTermNotes_6c258293-ae23-44cc-b618-6111aea708b8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SeniorLongTermNotes"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3cdfc5df-0c47-44c7-a6d8-f05571a9a1b3" xlink:to="loc_us-gaap_SeniorLongTermNotes_6c258293-ae23-44cc-b618-6111aea708b8" xlink:type="arc" order="10"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_DebtInstrumentCovenantFixedChargesCoverageRatioMinimum_9a8f94cd-f6c1-41ed-a432-85bcc81ced7f" xlink:href="msa-20200630.xsd#msa_DebtInstrumentCovenantFixedChargesCoverageRatioMinimum"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3cdfc5df-0c47-44c7-a6d8-f05571a9a1b3" xlink:to="loc_msa_DebtInstrumentCovenantFixedChargesCoverageRatioMinimum_9a8f94cd-f6c1-41ed-a432-85bcc81ced7f" xlink:type="arc" order="11"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_DebtInstrumentCovenantConsolidatedLeverageRatioMaximum_617e8fb7-ddfc-47bf-89ca-6832239974a1" xlink:href="msa-20200630.xsd#msa_DebtInstrumentCovenantConsolidatedLeverageRatioMaximum"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3cdfc5df-0c47-44c7-a6d8-f05571a9a1b3" xlink:to="loc_msa_DebtInstrumentCovenantConsolidatedLeverageRatioMaximum_617e8fb7-ddfc-47bf-89ca-6832239974a1" xlink:type="arc" order="12"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_DebtInstrumentCovenantConsolidatedLeverageRatioInPeriodOfAcquisitionMaximum_dcee00be-1d68-4a06-87d0-5106fb38c541" xlink:href="msa-20200630.xsd#msa_DebtInstrumentCovenantConsolidatedLeverageRatioInPeriodOfAcquisitionMaximum"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3cdfc5df-0c47-44c7-a6d8-f05571a9a1b3" xlink:to="loc_msa_DebtInstrumentCovenantConsolidatedLeverageRatioInPeriodOfAcquisitionMaximum_dcee00be-1d68-4a06-87d0-5106fb38c541" xlink:type="arc" order="13"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_f11882cc-473d-485c-9034-9b6a22d4cdc9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3cdfc5df-0c47-44c7-a6d8-f05571a9a1b3" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_f11882cc-473d-485c-9034-9b6a22d4cdc9" xlink:type="arc" order="14"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCollateralAmount_6a5f0b1d-f0d9-471a-b380-425a2b363ee5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentCollateralAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3cdfc5df-0c47-44c7-a6d8-f05571a9a1b3" xlink:to="loc_us-gaap_DebtInstrumentCollateralAmount_6a5f0b1d-f0d9-471a-b380-425a2b363ee5" xlink:type="arc" order="15"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_2ea6545d-1713-4f62-8960-a8c86d2f695d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3cdfc5df-0c47-44c7-a6d8-f05571a9a1b3" xlink:to="loc_us-gaap_DebtInstrumentTable_2ea6545d-1713-4f62-8960-a8c86d2f695d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_45515907-5866-44c0-b938-fd380f662e04" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2ea6545d-1713-4f62-8960-a8c86d2f695d" xlink:to="loc_us-gaap_CreditFacilityAxis_45515907-5866-44c0-b938-fd380f662e04" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_45515907-5866-44c0-b938-fd380f662e04_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_45515907-5866-44c0-b938-fd380f662e04" xlink:to="loc_us-gaap_CreditFacilityDomain_45515907-5866-44c0-b938-fd380f662e04_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_185b0df8-1fb7-4369-9495-5c649bf2dd4e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_45515907-5866-44c0-b938-fd380f662e04" xlink:to="loc_us-gaap_CreditFacilityDomain_185b0df8-1fb7-4369-9495-5c649bf2dd4e" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StandbyLettersOfCreditMember_d81e1567-e8b0-457b-bf73-dd27eaa10187" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StandbyLettersOfCreditMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_185b0df8-1fb7-4369-9495-5c649bf2dd4e" xlink:to="loc_us-gaap_StandbyLettersOfCreditMember_d81e1567-e8b0-457b-bf73-dd27eaa10187" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_49f94b96-0f79-4e83-b393-8018eea4293b" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2ea6545d-1713-4f62-8960-a8c86d2f695d" xlink:to="loc_srt_RangeAxis_49f94b96-0f79-4e83-b393-8018eea4293b" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_49f94b96-0f79-4e83-b393-8018eea4293b_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_49f94b96-0f79-4e83-b393-8018eea4293b" xlink:to="loc_srt_RangeMember_49f94b96-0f79-4e83-b393-8018eea4293b_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_5c0b00d7-38b3-41b8-bd00-9e88bf84d34b" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_49f94b96-0f79-4e83-b393-8018eea4293b" xlink:to="loc_srt_RangeMember_5c0b00d7-38b3-41b8-bd00-9e88bf84d34b" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_8e4dc0bb-8cce-440c-9832-df0f3bdb4eb2" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_5c0b00d7-38b3-41b8-bd00-9e88bf84d34b" xlink:to="loc_srt_MinimumMember_8e4dc0bb-8cce-440c-9832-df0f3bdb4eb2" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_aaf0cb85-52cc-44f4-9aa4-820d32684777" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_5c0b00d7-38b3-41b8-bd00-9e88bf84d34b" xlink:to="loc_srt_MaximumMember_aaf0cb85-52cc-44f4-9aa4-820d32684777" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_1af8e53a-c79c-43b4-99cc-dd3d17c554b7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableRateAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2ea6545d-1713-4f62-8960-a8c86d2f695d" xlink:to="loc_us-gaap_VariableRateAxis_1af8e53a-c79c-43b4-99cc-dd3d17c554b7" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_1af8e53a-c79c-43b4-99cc-dd3d17c554b7_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableRateDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_1af8e53a-c79c-43b4-99cc-dd3d17c554b7" xlink:to="loc_us-gaap_VariableRateDomain_1af8e53a-c79c-43b4-99cc-dd3d17c554b7_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_4d0ed4d1-0ccd-4844-b602-b4958b914394" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableRateDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_1af8e53a-c79c-43b4-99cc-dd3d17c554b7" xlink:to="loc_us-gaap_VariableRateDomain_4d0ed4d1-0ccd-4844-b602-b4958b914394" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_2647103f-129b-4222-82f7-c264b9789a5c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BaseRateMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_4d0ed4d1-0ccd-4844-b602-b4958b914394" xlink:to="loc_us-gaap_BaseRateMember_2647103f-129b-4222-82f7-c264b9789a5c" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_FederalFundsOpenRateMember_15efc3ca-e4ed-4cd4-9c86-4712572692ce" xlink:href="msa-20200630.xsd#msa_FederalFundsOpenRateMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_4d0ed4d1-0ccd-4844-b602-b4958b914394" xlink:to="loc_msa_FederalFundsOpenRateMember_15efc3ca-e4ed-4cd4-9c86-4712572692ce" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_OvernightBankFundingRateMember_8e972e6a-6b3f-441b-986b-62ef462d702d" xlink:href="msa-20200630.xsd#msa_OvernightBankFundingRateMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_4d0ed4d1-0ccd-4844-b602-b4958b914394" xlink:to="loc_msa_OvernightBankFundingRateMember_8e972e6a-6b3f-441b-986b-62ef462d702d" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_450672c7-2739-4bfd-ba2c-f34f1c7d6118" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_4d0ed4d1-0ccd-4844-b602-b4958b914394" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_450672c7-2739-4bfd-ba2c-f34f1c7d6118" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_fbad7c96-0c5f-401b-8572-30527cc400fd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2ea6545d-1713-4f62-8960-a8c86d2f695d" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_fbad7c96-0c5f-401b-8572-30527cc400fd" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_fbad7c96-0c5f-401b-8572-30527cc400fd_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_fbad7c96-0c5f-401b-8572-30527cc400fd" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_fbad7c96-0c5f-401b-8572-30527cc400fd_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_aa381e7e-2089-4b95-9ef8-e9a725910fcd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_fbad7c96-0c5f-401b-8572-30527cc400fd" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_aa381e7e-2089-4b95-9ef8-e9a725910fcd" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesPayableOtherPayablesMember_463b7cd3-ab03-4aff-ad22-8b6f2ad636f4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NotesPayableOtherPayablesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_aa381e7e-2089-4b95-9ef8-e9a725910fcd" xlink:to="loc_us-gaap_NotesPayableOtherPayablesMember_463b7cd3-ab03-4aff-ad22-8b6f2ad636f4" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_241a7363-ca20-4d45-9649-fad9fbae38cb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2ea6545d-1713-4f62-8960-a8c86d2f695d" xlink:to="loc_us-gaap_DebtInstrumentAxis_241a7363-ca20-4d45-9649-fad9fbae38cb" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_241a7363-ca20-4d45-9649-fad9fbae38cb_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_241a7363-ca20-4d45-9649-fad9fbae38cb" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_241a7363-ca20-4d45-9649-fad9fbae38cb_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_41dd7e33-0d3e-4358-ac24-6ac27ae6f012" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_241a7363-ca20-4d45-9649-fad9fbae38cb" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_41dd7e33-0d3e-4358-ac24-6ac27ae6f012" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_SeniorRevolvingCreditFacilityMaturingin2023Member_fbfc490d-c4ed-4102-988c-1d7f7418a6cd" xlink:href="msa-20200630.xsd#msa_SeniorRevolvingCreditFacilityMaturingin2023Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_41dd7e33-0d3e-4358-ac24-6ac27ae6f012" xlink:to="loc_msa_SeniorRevolvingCreditFacilityMaturingin2023Member_fbfc490d-c4ed-4102-988c-1d7f7418a6cd" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_MulticurrencyNotesDuein2031Member_be7498b2-8e24-48d7-b738-2bb4cc54d133" xlink:href="msa-20200630.xsd#msa_MulticurrencyNotesDuein2031Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_41dd7e33-0d3e-4358-ac24-6ac27ae6f012" xlink:to="loc_msa_MulticurrencyNotesDuein2031Member_be7498b2-8e24-48d7-b738-2bb4cc54d133" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_MasterNoteFacilityDuein2022Member_64993e22-3744-4389-a151-2e3e9762504b" xlink:href="msa-20200630.xsd#msa_MasterNoteFacilityDuein2022Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_41dd7e33-0d3e-4358-ac24-6ac27ae6f012" xlink:to="loc_msa_MasterNoteFacilityDuein2022Member_64993e22-3744-4389-a151-2e3e9762504b" xlink:type="arc" order="2"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/GoodwillandIntangibleAssets" xlink:type="simple" xlink:href="msa-20200630.xsd#GoodwillandIntangibleAssets"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/GoodwillandIntangibleAssets" xlink:type="extended" id="i915dc45016ec4a119421181999775758_GoodwillandIntangibleAssets"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/GoodwillandIntangibleAssetsTables" xlink:type="simple" xlink:href="msa-20200630.xsd#GoodwillandIntangibleAssetsTables"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/GoodwillandIntangibleAssetsTables" xlink:type="extended" id="i8c0baa95208e4d03a40770f340d57e77_GoodwillandIntangibleAssetsTables"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/GoodwillandIntangibleAssetsChangesinGoodwillDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#GoodwillandIntangibleAssetsChangesinGoodwillDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/GoodwillandIntangibleAssetsChangesinGoodwillDetails" xlink:type="extended" id="if9c6d321d928441a881fe5027af71a6a_GoodwillandIntangibleAssetsChangesinGoodwillDetails"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/GoodwillandIntangibleAssetsAdditionalInformationDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#GoodwillandIntangibleAssetsAdditionalInformationDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/GoodwillandIntangibleAssetsAdditionalInformationDetails" xlink:type="extended" id="i9a8ef2632f544d8f9d595956cd2aa781_GoodwillandIntangibleAssetsAdditionalInformationDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_9739b863-b3c4-4632-87f2-1b57da520c29" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_06da4e51-bad9-43a7-90db-6b9e12ef21bc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_9739b863-b3c4-4632-87f2-1b57da520c29" xlink:to="loc_us-gaap_Goodwill_06da4e51-bad9-43a7-90db-6b9e12ef21bc" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets_f17dd803-13ea-4616-b957-3e8d7cbb978c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_9739b863-b3c4-4632-87f2-1b57da520c29" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets_f17dd803-13ea-4616-b957-3e8d7cbb978c" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_987595cc-3ae7-44a8-92ba-0ddcf98f1ded" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_9739b863-b3c4-4632-87f2-1b57da520c29" xlink:to="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_987595cc-3ae7-44a8-92ba-0ddcf98f1ded" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_295bbe92-1157-4cae-9e58-f3bc0ae3548c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_987595cc-3ae7-44a8-92ba-0ddcf98f1ded" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_295bbe92-1157-4cae-9e58-f3bc0ae3548c" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_295bbe92-1157-4cae-9e58-f3bc0ae3548c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_295bbe92-1157-4cae-9e58-f3bc0ae3548c" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_295bbe92-1157-4cae-9e58-f3bc0ae3548c_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_fdb1132c-bfe0-4ccd-8d37-c336371b667d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_295bbe92-1157-4cae-9e58-f3bc0ae3548c" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_fdb1132c-bfe0-4ccd-8d37-c336371b667d" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_0a802e50-1173-455f-95e9-551548535fc1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TradeNamesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_fdb1132c-bfe0-4ccd-8d37-c336371b667d" xlink:to="loc_us-gaap_TradeNamesMember_0a802e50-1173-455f-95e9-551548535fc1" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_ac094e52-38fb-4885-ba06-06cf39a62ef3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_987595cc-3ae7-44a8-92ba-0ddcf98f1ded" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_ac094e52-38fb-4885-ba06-06cf39a62ef3" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ac094e52-38fb-4885-ba06-06cf39a62ef3_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_ac094e52-38fb-4885-ba06-06cf39a62ef3" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ac094e52-38fb-4885-ba06-06cf39a62ef3_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f325c6f0-189f-4f5f-8d1f-626d90db86c2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_ac094e52-38fb-4885-ba06-06cf39a62ef3" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f325c6f0-189f-4f5f-8d1f-626d90db86c2" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_GlobeHoldingCompanyLLCMember_c1912bf6-d529-4994-9876-95d677d3f3ed" xlink:href="msa-20200630.xsd#msa_GlobeHoldingCompanyLLCMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f325c6f0-189f-4f5f-8d1f-626d90db86c2" xlink:to="loc_msa_GlobeHoldingCompanyLLCMember_c1912bf6-d529-4994-9876-95d677d3f3ed" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_5e6df885-3655-40a9-b343-48b2f60a269d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_987595cc-3ae7-44a8-92ba-0ddcf98f1ded" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_5e6df885-3655-40a9-b343-48b2f60a269d" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_5e6df885-3655-40a9-b343-48b2f60a269d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_5e6df885-3655-40a9-b343-48b2f60a269d" xlink:to="loc_us-gaap_SegmentDomain_5e6df885-3655-40a9-b343-48b2f60a269d_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_3a423c4b-c902-441d-8d68-20ceebb7e28f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_5e6df885-3655-40a9-b343-48b2f60a269d" xlink:to="loc_us-gaap_SegmentDomain_3a423c4b-c902-441d-8d68-20ceebb7e28f" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_AmericasMember_14012bd0-9146-4fdb-be15-ad28389cf801" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_AmericasMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3a423c4b-c902-441d-8d68-20ceebb7e28f" xlink:to="loc_srt_AmericasMember_14012bd0-9146-4fdb-be15-ad28389cf801" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_InternationalSegmentMember_8574e4c5-76c1-4993-9b3f-a7a588112dd5" xlink:href="msa-20200630.xsd#msa_InternationalSegmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3a423c4b-c902-441d-8d68-20ceebb7e28f" xlink:to="loc_msa_InternationalSegmentMember_8574e4c5-76c1-4993-9b3f-a7a588112dd5" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/GoodwillandIntangibleAssetsChangesinIntangibleAssetsNetofAccumulatedAmortizationDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#GoodwillandIntangibleAssetsChangesinIntangibleAssetsNetofAccumulatedAmortizationDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/GoodwillandIntangibleAssetsChangesinIntangibleAssetsNetofAccumulatedAmortizationDetails" xlink:type="extended" id="i2b4470156f8a41c4ae47cfb7d3d11de0_GoodwillandIntangibleAssetsChangesinIntangibleAssetsNetofAccumulatedAmortizationDetails"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/PensionsandOtherPostretirementBenefits" xlink:type="simple" xlink:href="msa-20200630.xsd#PensionsandOtherPostretirementBenefits"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/PensionsandOtherPostretirementBenefits" xlink:type="extended" id="i3e5b507f1577424fb0e2a22fd36a1186_PensionsandOtherPostretirementBenefits"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/PensionsandOtherPostretirementBenefitsTables" xlink:type="simple" xlink:href="msa-20200630.xsd#PensionsandOtherPostretirementBenefitsTables"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/PensionsandOtherPostretirementBenefitsTables" xlink:type="extended" id="i777ef6d10d47488389d192ae484920a3_PensionsandOtherPostretirementBenefitsTables"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/PensionsandOtherPostretirementBenefitsComponentsofNetPeriodicBenefitCostDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#PensionsandOtherPostretirementBenefitsComponentsofNetPeriodicBenefitCostDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/PensionsandOtherPostretirementBenefitsComponentsofNetPeriodicBenefitCostDetails" xlink:type="extended" id="i738e7e6f886044e3aefd6354ce324a9d_PensionsandOtherPostretirementBenefitsComponentsofNetPeriodicBenefitCostDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_fb42ac12-d2c8-437b-9789-aac334502eaa" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_07e49037-cb3d-4d49-ba18-0180cbb56108" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_fb42ac12-d2c8-437b-9789-aac334502eaa" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_07e49037-cb3d-4d49-ba18-0180cbb56108" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_f0c80480-8159-48c3-abf7-d57eb82cdc6c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_fb42ac12-d2c8-437b-9789-aac334502eaa" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_f0c80480-8159-48c3-abf7-d57eb82cdc6c" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_92575507-9d30-4ebd-9d53-58760070893c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_fb42ac12-d2c8-437b-9789-aac334502eaa" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_92575507-9d30-4ebd-9d53-58760070893c" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_cb250337-3d2b-4bda-8897-d7a4e309f949" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_fb42ac12-d2c8-437b-9789-aac334502eaa" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_cb250337-3d2b-4bda-8897-d7a4e309f949" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_f03963b6-bf3c-4f7c-93fa-66c93609d9ad" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanActuarialGainLoss"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_fb42ac12-d2c8-437b-9789-aac334502eaa" xlink:to="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_f03963b6-bf3c-4f7c-93fa-66c93609d9ad" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_ef74f07f-f015-45f9-9700-0f89d72f9932" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_fb42ac12-d2c8-437b-9789-aac334502eaa" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_ef74f07f-f015-45f9-9700-0f89d72f9932" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_f3b7c5e2-ac8b-453a-a79e-30445526a79e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_fb42ac12-d2c8-437b-9789-aac334502eaa" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_f3b7c5e2-ac8b-453a-a79e-30445526a79e" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_013f2c62-9a92-4aad-817a-252cba2d7e33" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_fb42ac12-d2c8-437b-9789-aac334502eaa" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_013f2c62-9a92-4aad-817a-252cba2d7e33" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_2e327638-48a7-40ff-ae47-ce8be36e52a8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetirementPlanTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_013f2c62-9a92-4aad-817a-252cba2d7e33" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_2e327638-48a7-40ff-ae47-ce8be36e52a8" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_2e327638-48a7-40ff-ae47-ce8be36e52a8_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_2e327638-48a7-40ff-ae47-ce8be36e52a8" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_2e327638-48a7-40ff-ae47-ce8be36e52a8_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_57bfe329-4074-4780-a1f1-f5c424b3170d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_2e327638-48a7-40ff-ae47-ce8be36e52a8" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_57bfe329-4074-4780-a1f1-f5c424b3170d" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_ff362a78-1e12-4248-b3ef-0dfd480d621a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_57bfe329-4074-4780-a1f1-f5c424b3170d" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_ff362a78-1e12-4248-b3ef-0dfd480d621a" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_da670bdd-6ef9-4553-8e5f-ae975d3d5bee" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_57bfe329-4074-4780-a1f1-f5c424b3170d" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_da670bdd-6ef9-4553-8e5f-ae975d3d5bee" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/PensionsandOtherPostretirementBenefitsAdditionalInformationDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#PensionsandOtherPostretirementBenefitsAdditionalInformationDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/PensionsandOtherPostretirementBenefitsAdditionalInformationDetails" xlink:type="extended" id="ieaa5b58ebf9e4f14924c7931a9d309cb_PensionsandOtherPostretirementBenefitsAdditionalInformationDetails"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/DerivativeFinancialInstruments" xlink:type="simple" xlink:href="msa-20200630.xsd#DerivativeFinancialInstruments"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/DerivativeFinancialInstruments" xlink:type="extended" id="i6b70f6aaae8a423e823306587d2fb4d6_DerivativeFinancialInstruments"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/DerivativeFinancialInstrumentsTables" xlink:type="simple" xlink:href="msa-20200630.xsd#DerivativeFinancialInstrumentsTables"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/DerivativeFinancialInstrumentsTables" xlink:type="extended" id="ice1f8851ec20411bb92d91192d095f8a_DerivativeFinancialInstrumentsTables"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#DerivativeFinancialInstrumentsAdditionalInformationDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails" xlink:type="extended" id="i5352b600031747f5959eae2aab3086d0_DerivativeFinancialInstrumentsAdditionalInformationDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_d904fe0c-a0e6-4911-8f51-b371efc0ea38" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_0ada80ee-c5bb-4598-8261-01e0207e4cfd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeNotionalAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_d904fe0c-a0e6-4911-8f51-b371efc0ea38" xlink:to="loc_us-gaap_DerivativeNotionalAmount_0ada80ee-c5bb-4598-8261-01e0207e4cfd" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_716a1409-c7fd-45fb-8500-3235ba6e3884" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_d904fe0c-a0e6-4911-8f51-b371efc0ea38" xlink:to="loc_us-gaap_DerivativeTable_716a1409-c7fd-45fb-8500-3235ba6e3884" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_da30d9a4-c9e2-4273-82e7-e8bb2fc749c7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_716a1409-c7fd-45fb-8500-3235ba6e3884" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_da30d9a4-c9e2-4273-82e7-e8bb2fc749c7" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_da30d9a4-c9e2-4273-82e7-e8bb2fc749c7_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_da30d9a4-c9e2-4273-82e7-e8bb2fc749c7" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_da30d9a4-c9e2-4273-82e7-e8bb2fc749c7_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_ddeaf319-3a6b-4615-baeb-4fa01c3c22dd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_da30d9a4-c9e2-4273-82e7-e8bb2fc749c7" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_ddeaf319-3a6b-4615-baeb-4fa01c3c22dd" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_dc83c76b-d8f1-4b3c-856d-b6db15bf260a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignExchangeForwardMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_ddeaf319-3a6b-4615-baeb-4fa01c3c22dd" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_dc83c76b-d8f1-4b3c-856d-b6db15bf260a" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/DerivativeFinancialInstrumentsBalanceSheetLocationandFairValueofAssetsAssociatedwithDerivativeFinancialInstrumentsDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#DerivativeFinancialInstrumentsBalanceSheetLocationandFairValueofAssetsAssociatedwithDerivativeFinancialInstrumentsDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/DerivativeFinancialInstrumentsBalanceSheetLocationandFairValueofAssetsAssociatedwithDerivativeFinancialInstrumentsDetails" xlink:type="extended" id="i8eada300409e4ee3b35fe3785b53c507_DerivativeFinancialInstrumentsBalanceSheetLocationandFairValueofAssetsAssociatedwithDerivativeFinancialInstrumentsDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_bc0ef7d0-ea5a-42cd-9bc1-a1d71fe4b4e2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativesFairValueLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue_69b45f77-82e3-4227-a4a4-f900fe2ccf1e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_bc0ef7d0-ea5a-42cd-9bc1-a1d71fe4b4e2" xlink:to="loc_us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue_69b45f77-82e3-4227-a4a4-f900fe2ccf1e" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue_6415aadf-4f89-4b42-943d-32ecc818adee" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_bc0ef7d0-ea5a-42cd-9bc1-a1d71fe4b4e2" xlink:to="loc_us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue_6415aadf-4f89-4b42-943d-32ecc818adee" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_d9721b0c-0956-4754-9382-333cac37f878" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_bc0ef7d0-ea5a-42cd-9bc1-a1d71fe4b4e2" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_d9721b0c-0956-4754-9382-333cac37f878" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_2ea9f9a6-f624-4d61-9eda-112c6a2a4cf3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HedgingDesignationAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_d9721b0c-0956-4754-9382-333cac37f878" xlink:to="loc_us-gaap_HedgingDesignationAxis_2ea9f9a6-f624-4d61-9eda-112c6a2a4cf3" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_2ea9f9a6-f624-4d61-9eda-112c6a2a4cf3_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HedgingDesignationDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_2ea9f9a6-f624-4d61-9eda-112c6a2a4cf3" xlink:to="loc_us-gaap_HedgingDesignationDomain_2ea9f9a6-f624-4d61-9eda-112c6a2a4cf3_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_5364018d-8aba-4ad9-a0fe-ddbc5926a251" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HedgingDesignationDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_2ea9f9a6-f624-4d61-9eda-112c6a2a4cf3" xlink:to="loc_us-gaap_HedgingDesignationDomain_5364018d-8aba-4ad9-a0fe-ddbc5926a251" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_085b0e8a-1416-49c0-9086-1587e35a263e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NondesignatedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_5364018d-8aba-4ad9-a0fe-ddbc5926a251" xlink:to="loc_us-gaap_NondesignatedMember_085b0e8a-1416-49c0-9086-1587e35a263e" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_ca9b67a4-d3e4-4d81-bd3f-b617f74ff53d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_d9721b0c-0956-4754-9382-333cac37f878" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_ca9b67a4-d3e4-4d81-bd3f-b617f74ff53d" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_ca9b67a4-d3e4-4d81-bd3f-b617f74ff53d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_ca9b67a4-d3e4-4d81-bd3f-b617f74ff53d" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_ca9b67a4-d3e4-4d81-bd3f-b617f74ff53d_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_15a5acf0-cd63-4c21-8470-2cfd327d217c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_ca9b67a4-d3e4-4d81-bd3f-b617f74ff53d" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_15a5acf0-cd63-4c21-8470-2cfd327d217c" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCurrentLiabilitiesMember_7d7e9971-888c-4f93-b99b-af02d08af25e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCurrentLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_15a5acf0-cd63-4c21-8470-2cfd327d217c" xlink:to="loc_us-gaap_OtherCurrentLiabilitiesMember_7d7e9971-888c-4f93-b99b-af02d08af25e" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCurrentAssetsMember_a9a1835c-cfac-492e-b847-7c6dd4fb1fa3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCurrentAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_15a5acf0-cd63-4c21-8470-2cfd327d217c" xlink:to="loc_us-gaap_OtherCurrentAssetsMember_a9a1835c-cfac-492e-b847-7c6dd4fb1fa3" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/DerivativeFinancialInstrumentsIncomeStatementLocationandImpactofDerivativeFinancialInstrumentsDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#DerivativeFinancialInstrumentsIncomeStatementLocationandImpactofDerivativeFinancialInstrumentsDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/DerivativeFinancialInstrumentsIncomeStatementLocationandImpactofDerivativeFinancialInstrumentsDetails" xlink:type="extended" id="if6d3f0d13d29496688f8ae74e3a52de7_DerivativeFinancialInstrumentsIncomeStatementLocationandImpactofDerivativeFinancialInstrumentsDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_c6abfe56-9be6-4967-822e-d5f0e822122e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_9872877c-aaaa-4950-921b-e1c2141262f3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_c6abfe56-9be6-4967-822e-d5f0e822122e" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_9872877c-aaaa-4950-921b-e1c2141262f3" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_fafd9309-1f2b-4552-901d-05df035d93b4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_c6abfe56-9be6-4967-822e-d5f0e822122e" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_fafd9309-1f2b-4552-901d-05df035d93b4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_031ee064-182c-4963-a059-f5dfd184d973" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HedgingDesignationAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_fafd9309-1f2b-4552-901d-05df035d93b4" xlink:to="loc_us-gaap_HedgingDesignationAxis_031ee064-182c-4963-a059-f5dfd184d973" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_031ee064-182c-4963-a059-f5dfd184d973_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HedgingDesignationDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_031ee064-182c-4963-a059-f5dfd184d973" xlink:to="loc_us-gaap_HedgingDesignationDomain_031ee064-182c-4963-a059-f5dfd184d973_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_944d7831-3fa7-4c19-8890-32d38d5fd177" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HedgingDesignationDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_031ee064-182c-4963-a059-f5dfd184d973" xlink:to="loc_us-gaap_HedgingDesignationDomain_944d7831-3fa7-4c19-8890-32d38d5fd177" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_a2b59ee9-9b01-4feb-8a42-1a1d05db7080" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NondesignatedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_944d7831-3fa7-4c19-8890-32d38d5fd177" xlink:to="loc_us-gaap_NondesignatedMember_a2b59ee9-9b01-4feb-8a42-1a1d05db7080" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/FairValueMeasurements" xlink:type="simple" xlink:href="msa-20200630.xsd#FairValueMeasurements"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/FairValueMeasurements" xlink:type="extended" id="ie35d5713d5fe47e283c639aaa0bcf962_FairValueMeasurements"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/FairValueMeasurementsDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#FairValueMeasurementsDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/FairValueMeasurementsDetails" xlink:type="extended" id="i53f38954ef4c479a8e684dc6c8d881e8_FairValueMeasurementsDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3a74ec61-d8c8-4ba9-92d6-6450c0eda9d8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_6b72726b-53b7-4536-8e23-b70d121e5d36" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3a74ec61-d8c8-4ba9-92d6-6450c0eda9d8" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_6b72726b-53b7-4536-8e23-b70d121e5d36" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_8817378c-9033-4ae2-9ee0-d5679e798798" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentsFairValueDisclosure"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3a74ec61-d8c8-4ba9-92d6-6450c0eda9d8" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_8817378c-9033-4ae2-9ee0-d5679e798798" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_2a304206-2465-4146-8dc8-a66cce2f9b87" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtFairValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3a74ec61-d8c8-4ba9-92d6-6450c0eda9d8" xlink:to="loc_us-gaap_LongTermDebtFairValue_2a304206-2465-4146-8dc8-a66cce2f9b87" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_edb715fb-8963-4f03-a806-8cb455394aa4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3a74ec61-d8c8-4ba9-92d6-6450c0eda9d8" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_edb715fb-8963-4f03-a806-8cb455394aa4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_f2742fdd-8ac2-4a18-af16-59badd23026a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_edb715fb-8963-4f03-a806-8cb455394aa4" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_f2742fdd-8ac2-4a18-af16-59badd23026a" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_f2742fdd-8ac2-4a18-af16-59badd23026a_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_f2742fdd-8ac2-4a18-af16-59badd23026a" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_f2742fdd-8ac2-4a18-af16-59badd23026a_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_c55643eb-c1e0-4c4f-b17e-6305bd988420" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_f2742fdd-8ac2-4a18-af16-59badd23026a" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_c55643eb-c1e0-4c4f-b17e-6305bd988420" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_33449fb3-58e3-4726-8394-6d594e2e7e1f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_c55643eb-c1e0-4c4f-b17e-6305bd988420" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_33449fb3-58e3-4726-8394-6d594e2e7e1f" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_06aa53da-3943-4271-b55a-bfac8a3c2af5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_33449fb3-58e3-4726-8394-6d594e2e7e1f" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_06aa53da-3943-4271-b55a-bfac8a3c2af5" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_0c87ff31-99cf-41b8-ac81-aa923d9da159" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_33449fb3-58e3-4726-8394-6d594e2e7e1f" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_0c87ff31-99cf-41b8-ac81-aa923d9da159" xlink:type="arc" order="2"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/Contingencies" xlink:type="simple" xlink:href="msa-20200630.xsd#Contingencies"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/Contingencies" xlink:type="extended" id="ifdf9bb7b74ee4d58beffaf76015d0ffe_Contingencies"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/ContingenciesTables" xlink:type="simple" xlink:href="msa-20200630.xsd#ContingenciesTables"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/ContingenciesTables" xlink:type="extended" id="i92198862ad484caa8edbb1e65b526505_ContingenciesTables"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/ContingenciesAdditionalInformationDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#ContingenciesAdditionalInformationDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/ContingenciesAdditionalInformationDetails" xlink:type="extended" id="ia3abba8145ff4cc0802f07f8a1bea4eb_ContingenciesAdditionalInformationDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_588938ae-c653-43a5-956b-e732000fc706" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingenciesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductLiabilityAccrualComponentAmount_d1650d90-261f-4eff-85dd-fa1a335f82fc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProductLiabilityAccrualComponentAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_588938ae-c653-43a5-956b-e732000fc706" xlink:to="loc_us-gaap_ProductLiabilityAccrualComponentAmount_d1650d90-261f-4eff-85dd-fa1a335f82fc" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductLiabilityAccrualPeriodExpense_7890ad49-9e0d-4846-861f-8b6136882211" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProductLiabilityAccrualPeriodExpense"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_588938ae-c653-43a5-956b-e732000fc706" xlink:to="loc_us-gaap_ProductLiabilityAccrualPeriodExpense_7890ad49-9e0d-4846-861f-8b6136882211" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyPendingClaimsNumber_0d1d5301-eb5d-4dcc-b8bc-0ddd0087c106" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingencyPendingClaimsNumber"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_588938ae-c653-43a5-956b-e732000fc706" xlink:to="loc_us-gaap_LossContingencyPendingClaimsNumber_0d1d5301-eb5d-4dcc-b8bc-0ddd0087c106" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_LossContingencyYearsofActivity_e99e2ce4-e5a8-4f44-b4a1-6b8a5d1e7220" xlink:href="msa-20200630.xsd#msa_LossContingencyYearsofActivity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_588938ae-c653-43a5-956b-e732000fc706" xlink:to="loc_msa_LossContingencyYearsofActivity_e99e2ce4-e5a8-4f44-b4a1-6b8a5d1e7220" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyAccrualProductLiabilityGross_966c8e91-1b58-4845-bf42-aa37e06d31bd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingencyAccrualProductLiabilityGross"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_588938ae-c653-43a5-956b-e732000fc706" xlink:to="loc_us-gaap_LossContingencyAccrualProductLiabilityGross_966c8e91-1b58-4845-bf42-aa37e06d31bd" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InsuranceSettlementsReceivable_145da8a3-3eee-4cd9-9099-b76388e39cc9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InsuranceSettlementsReceivable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_588938ae-c653-43a5-956b-e732000fc706" xlink:to="loc_us-gaap_InsuranceSettlementsReceivable_145da8a3-3eee-4cd9-9099-b76388e39cc9" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InsuranceSettlementsReceivableCurrent_ec8620ea-7cb3-4326-a757-bd9ccaf67bb0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InsuranceSettlementsReceivableCurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_588938ae-c653-43a5-956b-e732000fc706" xlink:to="loc_us-gaap_InsuranceSettlementsReceivableCurrent_ec8620ea-7cb3-4326-a757-bd9ccaf67bb0" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InsuranceSettlementsReceivableNoncurrent_67cbac4e-18e1-44a1-bfe6-55edae768aa7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InsuranceSettlementsReceivableNoncurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_588938ae-c653-43a5-956b-e732000fc706" xlink:to="loc_us-gaap_InsuranceSettlementsReceivableNoncurrent_67cbac4e-18e1-44a1-bfe6-55edae768aa7" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_NotesLoansandFinancingReceivableNetInsuranceCompanies_213e5c5d-f29a-4311-9dad-90a10d005034" xlink:href="msa-20200630.xsd#msa_NotesLoansandFinancingReceivableNetInsuranceCompanies"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_588938ae-c653-43a5-956b-e732000fc706" xlink:to="loc_msa_NotesLoansandFinancingReceivableNetInsuranceCompanies_213e5c5d-f29a-4311-9dad-90a10d005034" xlink:type="arc" order="8"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesCurrent_d457690c-32cb-4548-a60a-c2ca5d078da9" xlink:href="msa-20200630.xsd#msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesCurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_588938ae-c653-43a5-956b-e732000fc706" xlink:to="loc_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesCurrent_d457690c-32cb-4548-a60a-c2ca5d078da9" xlink:type="arc" order="9"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_NotesReceivablesfromInsuranceCompaniesNoncurrent_ec4bf68d-80fd-44d4-9b51-81769ac4d8fc" xlink:href="msa-20200630.xsd#msa_NotesReceivablesfromInsuranceCompaniesNoncurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_588938ae-c653-43a5-956b-e732000fc706" xlink:to="loc_msa_NotesReceivablesfromInsuranceCompaniesNoncurrent_ec4bf68d-80fd-44d4-9b51-81769ac4d8fc" xlink:type="arc" order="10"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductWarrantyExpense_b4dd9b82-3925-4f01-8b50-d0deddc05db6" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProductWarrantyExpense"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_588938ae-c653-43a5-956b-e732000fc706" xlink:to="loc_us-gaap_ProductWarrantyExpense_b4dd9b82-3925-4f01-8b50-d0deddc05db6" xlink:type="arc" order="11"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_ba3600fc-7a8b-4125-85ae-227375f701fd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingenciesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_588938ae-c653-43a5-956b-e732000fc706" xlink:to="loc_us-gaap_LossContingenciesTable_ba3600fc-7a8b-4125-85ae-227375f701fd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_1ed7b111-0eff-495f-9b18-e635c0d35121" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_ba3600fc-7a8b-4125-85ae-227375f701fd" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_1ed7b111-0eff-495f-9b18-e635c0d35121" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_1ed7b111-0eff-495f-9b18-e635c0d35121_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_1ed7b111-0eff-495f-9b18-e635c0d35121" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_1ed7b111-0eff-495f-9b18-e635c0d35121_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_5e506814-7303-4d63-aa20-f265691c10bc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_1ed7b111-0eff-495f-9b18-e635c0d35121" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_5e506814-7303-4d63-aa20-f265691c10bc" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCurrentLiabilitiesMember_041a36f9-9c05-436e-a50e-2ed417125e54" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCurrentLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_5e506814-7303-4d63-aa20-f265691c10bc" xlink:to="loc_us-gaap_OtherCurrentLiabilitiesMember_041a36f9-9c05-436e-a50e-2ed417125e54" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_1c46452d-20fa-4e6b-bcc7-bb11247057a6" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNoncurrentLiabilitiesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_5e506814-7303-4d63-aa20-f265691c10bc" xlink:to="loc_us-gaap_OtherNoncurrentLiabilitiesMember_1c46452d-20fa-4e6b-bcc7-bb11247057a6" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_e553481a-fd9a-436f-8004-9dd25bb64e7b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_ba3600fc-7a8b-4125-85ae-227375f701fd" xlink:to="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_e553481a-fd9a-436f-8004-9dd25bb64e7b" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_e553481a-fd9a-436f-8004-9dd25bb64e7b_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingencyNatureDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_e553481a-fd9a-436f-8004-9dd25bb64e7b" xlink:to="loc_us-gaap_LossContingencyNatureDomain_e553481a-fd9a-436f-8004-9dd25bb64e7b_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_1dc19709-1a63-4f55-b274-5542e52d5b4f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingencyNatureDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_e553481a-fd9a-436f-8004-9dd25bb64e7b" xlink:to="loc_us-gaap_LossContingencyNatureDomain_1dc19709-1a63-4f55-b274-5542e52d5b4f" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_SingleIncidentMember_5206d514-871b-4fd3-852a-a72587534e01" xlink:href="msa-20200630.xsd#msa_SingleIncidentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_1dc19709-1a63-4f55-b274-5542e52d5b4f" xlink:to="loc_msa_SingleIncidentMember_5206d514-871b-4fd3-852a-a72587534e01" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_LawsuitMember_fb5eee00-c47a-4515-a07b-13ef2015b5aa" xlink:href="msa-20200630.xsd#msa_LawsuitMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_1dc19709-1a63-4f55-b274-5542e52d5b4f" xlink:to="loc_msa_LawsuitMember_fb5eee00-c47a-4515-a07b-13ef2015b5aa" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DamagesFromProductDefectsMember_9ec85a9f-2f5e-4355-9799-f6068b83ea93" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DamagesFromProductDefectsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_1dc19709-1a63-4f55-b274-5542e52d5b4f" xlink:to="loc_us-gaap_DamagesFromProductDefectsMember_9ec85a9f-2f5e-4355-9799-f6068b83ea93" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_CumulativeTraumaMember_d0466c1e-76a5-4a0f-8588-6376669d1f28" xlink:href="msa-20200630.xsd#msa_CumulativeTraumaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_1dc19709-1a63-4f55-b274-5542e52d5b4f" xlink:to="loc_msa_CumulativeTraumaMember_d0466c1e-76a5-4a0f-8588-6376669d1f28" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_ClaimsSettledButNotYetPaidMember_5d61cbf7-de8e-42ea-a905-5c86fa6fc8ee" xlink:href="msa-20200630.xsd#msa_ClaimsSettledButNotYetPaidMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_1dc19709-1a63-4f55-b274-5542e52d5b4f" xlink:to="loc_msa_ClaimsSettledButNotYetPaidMember_5d61cbf7-de8e-42ea-a905-5c86fa6fc8ee" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_CumulativeTraumaReportedClaimsMember_2f3958de-865b-40a2-a9ce-3fdc7228f1f9" xlink:href="msa-20200630.xsd#msa_CumulativeTraumaReportedClaimsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_1dc19709-1a63-4f55-b274-5542e52d5b4f" xlink:to="loc_msa_CumulativeTraumaReportedClaimsMember_2f3958de-865b-40a2-a9ce-3fdc7228f1f9" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_UninsuredCumulativeTraumaMember_ac10b1d6-bd5b-4bf6-a8a9-5b1468c14f95" xlink:href="msa-20200630.xsd#msa_UninsuredCumulativeTraumaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_1dc19709-1a63-4f55-b274-5542e52d5b4f" xlink:to="loc_msa_UninsuredCumulativeTraumaMember_ac10b1d6-bd5b-4bf6-a8a9-5b1468c14f95" xlink:type="arc" order="6"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/ContingenciesSummaryofCumulativeTraumaProductLiabilityClaimsActivityDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#ContingenciesSummaryofCumulativeTraumaProductLiabilityClaimsActivityDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/ContingenciesSummaryofCumulativeTraumaProductLiabilityClaimsActivityDetails" xlink:type="extended" id="i75fe42f017444444b692730475a677cf_ContingenciesSummaryofCumulativeTraumaProductLiabilityClaimsActivityDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_3e585837-6f36-444e-baba-a7e0c512ec63" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingenciesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_LossContingencyQuantitiesRollForward_422b8deb-0f93-48e7-a231-f09c6e13f2a7" xlink:href="msa-20200630.xsd#msa_LossContingencyQuantitiesRollForward"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_3e585837-6f36-444e-baba-a7e0c512ec63" xlink:to="loc_msa_LossContingencyQuantitiesRollForward_422b8deb-0f93-48e7-a231-f09c6e13f2a7" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyPendingClaimsNumber_5a982960-7f92-46de-8832-f78fcca7f568" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingencyPendingClaimsNumber"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_msa_LossContingencyQuantitiesRollForward_422b8deb-0f93-48e7-a231-f09c6e13f2a7" xlink:to="loc_us-gaap_LossContingencyPendingClaimsNumber_5a982960-7f92-46de-8832-f78fcca7f568" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNewClaimsFiledNumber_f785e23c-92d7-4ad8-84b2-cc4615713145" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingencyNewClaimsFiledNumber"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_msa_LossContingencyQuantitiesRollForward_422b8deb-0f93-48e7-a231-f09c6e13f2a7" xlink:to="loc_us-gaap_LossContingencyNewClaimsFiledNumber_f785e23c-92d7-4ad8-84b2-cc4615713145" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyClaimsSettledAndDismissedNumber_a9f9d763-8381-48c4-bac5-cdcdedcb3ac2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingencyClaimsSettledAndDismissedNumber"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_msa_LossContingencyQuantitiesRollForward_422b8deb-0f93-48e7-a231-f09c6e13f2a7" xlink:to="loc_us-gaap_LossContingencyClaimsSettledAndDismissedNumber_a9f9d763-8381-48c4-bac5-cdcdedcb3ac2" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyPendingClaimsNumber_14c03172-49cd-4175-b0f2-c30a821257fa" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingencyPendingClaimsNumber"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_94caf397-e6ec-4c59-967b-0280add53f7b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingenciesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_3e585837-6f36-444e-baba-a7e0c512ec63" xlink:to="loc_us-gaap_LossContingenciesTable_94caf397-e6ec-4c59-967b-0280add53f7b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_5484a1e2-c9e9-40eb-a589-a1ed9ff0e56e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_94caf397-e6ec-4c59-967b-0280add53f7b" xlink:to="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_5484a1e2-c9e9-40eb-a589-a1ed9ff0e56e" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_5484a1e2-c9e9-40eb-a589-a1ed9ff0e56e_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingencyNatureDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_5484a1e2-c9e9-40eb-a589-a1ed9ff0e56e" xlink:to="loc_us-gaap_LossContingencyNatureDomain_5484a1e2-c9e9-40eb-a589-a1ed9ff0e56e_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_dad8cc7c-74a9-4703-8e78-68c7dbb78e03" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingencyNatureDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_5484a1e2-c9e9-40eb-a589-a1ed9ff0e56e" xlink:to="loc_us-gaap_LossContingencyNatureDomain_dad8cc7c-74a9-4703-8e78-68c7dbb78e03" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_LawsuitMember_2cfea3b3-4ffd-441a-912b-7fc5ad010565" xlink:href="msa-20200630.xsd#msa_LawsuitMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_dad8cc7c-74a9-4703-8e78-68c7dbb78e03" xlink:to="loc_msa_LawsuitMember_2cfea3b3-4ffd-441a-912b-7fc5ad010565" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DamagesFromProductDefectsMember_c393859b-b0f8-4f88-9015-58db96eab614" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DamagesFromProductDefectsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_dad8cc7c-74a9-4703-8e78-68c7dbb78e03" xlink:to="loc_us-gaap_DamagesFromProductDefectsMember_c393859b-b0f8-4f88-9015-58db96eab614" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/ContingenciesSummaryofInsuranceReceivableBalancesandActivityRelatedtoCumulativeTraumaProductLiabilityLossesDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#ContingenciesSummaryofInsuranceReceivableBalancesandActivityRelatedtoCumulativeTraumaProductLiabilityLossesDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/ContingenciesSummaryofInsuranceReceivableBalancesandActivityRelatedtoCumulativeTraumaProductLiabilityLossesDetails" xlink:type="extended" id="ia16503fc0d2f47d4be7c25bc4930073c_ContingenciesSummaryofInsuranceReceivableBalancesandActivityRelatedtoCumulativeTraumaProductLiabilityLossesDetails"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/ContingenciesScheduleofNotesReceivableBalancesfromInsuranceCompaniesDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#ContingenciesScheduleofNotesReceivableBalancesfromInsuranceCompaniesDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/ContingenciesScheduleofNotesReceivableBalancesfromInsuranceCompaniesDetails" xlink:type="extended" id="i88b449ddd0f4469988962e551327dc67_ContingenciesScheduleofNotesReceivableBalancesfromInsuranceCompaniesDetails"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/ContingenciesScheduleofProductWarrantyLiabilityDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#ContingenciesScheduleofProductWarrantyLiabilityDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/ContingenciesScheduleofProductWarrantyLiabilityDetails" xlink:type="extended" id="i4338c1a9500943a6b35019317c7fd3d7_ContingenciesScheduleofProductWarrantyLiabilityDetails"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/Acquisitions" xlink:type="simple" xlink:href="msa-20200630.xsd#Acquisitions"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/Acquisitions" xlink:type="extended" id="id7c56f3e55ae4b3d9b8dc51f9c6313b3_Acquisitions"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/AcquisitionsTables" xlink:type="simple" xlink:href="msa-20200630.xsd#AcquisitionsTables"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/AcquisitionsTables" xlink:type="extended" id="i4abdffa61a7347299d5904dc4722838e_AcquisitionsTables"/> |
| <link:roleRef roleURI="http://www.msasafety.com/role/AcquisitionsAdditionalInformationDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#AcquisitionsAdditionalInformationDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/AcquisitionsAdditionalInformationDetails" xlink:type="extended" id="ie5612279e5c34960b55a8b038dd75dd6_AcquisitionsAdditionalInformationDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_ba27ecb1-3085-45a5-89bd-3838d01b92e7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_01322c22-779d-4ebe-ad89-28a9e0a8b8d4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ba27ecb1-3085-45a5-89bd-3838d01b92e7" xlink:to="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_01322c22-779d-4ebe-ad89-28a9e0a8b8d4" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_6b3829ac-b924-4b2d-9661-e3db531f21da" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ba27ecb1-3085-45a5-89bd-3838d01b92e7" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_6b3829ac-b924-4b2d-9661-e3db531f21da" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_d2009782-99b3-490b-aebe-08a2b69a29c9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ba27ecb1-3085-45a5-89bd-3838d01b92e7" xlink:to="loc_us-gaap_Goodwill_d2009782-99b3-490b-aebe-08a2b69a29c9" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_259acfb7-e64f-401b-8868-0c173a034efa" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ba27ecb1-3085-45a5-89bd-3838d01b92e7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_259acfb7-e64f-401b-8868-0c173a034efa" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_6434bc02-7cc1-455a-bebd-4e9fc5ecd69c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ba27ecb1-3085-45a5-89bd-3838d01b92e7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_6434bc02-7cc1-455a-bebd-4e9fc5ecd69c" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_FiniteLivedIntangibleAssetsAmortizationExpenseYearsTwoThroughFour_ec7bd15f-fc2f-4b62-9691-7851b7a7cb6a" xlink:href="msa-20200630.xsd#msa_FiniteLivedIntangibleAssetsAmortizationExpenseYearsTwoThroughFour"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ba27ecb1-3085-45a5-89bd-3838d01b92e7" xlink:to="loc_msa_FiniteLivedIntangibleAssetsAmortizationExpenseYearsTwoThroughFour_ec7bd15f-fc2f-4b62-9691-7851b7a7cb6a" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_9b6d4a7b-c57d-4b00-a3cd-86135f1712a9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ba27ecb1-3085-45a5-89bd-3838d01b92e7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_9b6d4a7b-c57d-4b00-a3cd-86135f1712a9" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_31e389f8-666d-412f-bca2-0759a41cedb8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ba27ecb1-3085-45a5-89bd-3838d01b92e7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_31e389f8-666d-412f-bca2-0759a41cedb8" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_BusinessCombinationStepUpToFairValueOfAcquiredInventoryAspartOfPurchasePriceAllocation_8cab96df-6be4-4a41-9bfb-b9b5e258d063" xlink:href="msa-20200630.xsd#msa_BusinessCombinationStepUpToFairValueOfAcquiredInventoryAspartOfPurchasePriceAllocation"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ba27ecb1-3085-45a5-89bd-3838d01b92e7" xlink:to="loc_msa_BusinessCombinationStepUpToFairValueOfAcquiredInventoryAspartOfPurchasePriceAllocation_8cab96df-6be4-4a41-9bfb-b9b5e258d063" xlink:type="arc" order="8"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_BusinessCombinationAmortizationExpenseRelatedToStepUpToFairValueOfAcquiredInventoryAspartOfPurchasePriceAllocation_e39489ca-e47e-4c7d-aaa3-00c0485b54b1" xlink:href="msa-20200630.xsd#msa_BusinessCombinationAmortizationExpenseRelatedToStepUpToFairValueOfAcquiredInventoryAspartOfPurchasePriceAllocation"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ba27ecb1-3085-45a5-89bd-3838d01b92e7" xlink:to="loc_msa_BusinessCombinationAmortizationExpenseRelatedToStepUpToFairValueOfAcquiredInventoryAspartOfPurchasePriceAllocation_e39489ca-e47e-4c7d-aaa3-00c0485b54b1" xlink:type="arc" order="9"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_767f305c-7847-4cc8-991d-0dce77ac9d8c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ba27ecb1-3085-45a5-89bd-3838d01b92e7" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_767f305c-7847-4cc8-991d-0dce77ac9d8c" xlink:type="arc" order="10"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_d0bbf355-8fe3-4347-9737-41bec80e34bc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ba27ecb1-3085-45a5-89bd-3838d01b92e7" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_d0bbf355-8fe3-4347-9737-41bec80e34bc" xlink:type="arc" order="11"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_03d062ed-c787-4e42-b362-eddca65fe8eb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ba27ecb1-3085-45a5-89bd-3838d01b92e7" xlink:to="loc_us-gaap_NetIncomeLoss_03d062ed-c787-4e42-b362-eddca65fe8eb" xlink:type="arc" order="12"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts_dde83636-1601-4f39-8648-5706c7c3b387" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ba27ecb1-3085-45a5-89bd-3838d01b92e7" xlink:to="loc_us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts_dde83636-1601-4f39-8648-5706c7c3b387" xlink:type="arc" order="13"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_2d1a2f73-95d1-48b7-b531-56d0d10655f1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ba27ecb1-3085-45a5-89bd-3838d01b92e7" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_2d1a2f73-95d1-48b7-b531-56d0d10655f1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_7fd2d5bc-025e-4a13-99a9-397380e9d8ac" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_2d1a2f73-95d1-48b7-b531-56d0d10655f1" xlink:to="loc_us-gaap_AwardTypeAxis_7fd2d5bc-025e-4a13-99a9-397380e9d8ac" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7fd2d5bc-025e-4a13-99a9-397380e9d8ac_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_7fd2d5bc-025e-4a13-99a9-397380e9d8ac" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7fd2d5bc-025e-4a13-99a9-397380e9d8ac_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_31e708bd-53a1-408b-89e8-6edc951ee306" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_7fd2d5bc-025e-4a13-99a9-397380e9d8ac" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_31e708bd-53a1-408b-89e8-6edc951ee306" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_StockOptionsAndRestrictedStockUnitsMember_6707f01c-255e-47b2-b8eb-365bbd16e359" xlink:href="msa-20200630.xsd#msa_StockOptionsAndRestrictedStockUnitsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_31e708bd-53a1-408b-89e8-6edc951ee306" xlink:to="loc_msa_StockOptionsAndRestrictedStockUnitsMember_6707f01c-255e-47b2-b8eb-365bbd16e359" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_4b7d17dc-6e96-4e4b-bbb8-13f78163200b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_2d1a2f73-95d1-48b7-b531-56d0d10655f1" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_4b7d17dc-6e96-4e4b-bbb8-13f78163200b" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4b7d17dc-6e96-4e4b-bbb8-13f78163200b_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_4b7d17dc-6e96-4e4b-bbb8-13f78163200b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4b7d17dc-6e96-4e4b-bbb8-13f78163200b_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_27affee4-d875-42e7-acf5-48af85bcacf6" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_4b7d17dc-6e96-4e4b-bbb8-13f78163200b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_27affee4-d875-42e7-acf5-48af85bcacf6" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelatedIntangibleAssetsMember_8b13e234-3ee4-401f-83b5-2d21b7802e60" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CustomerRelatedIntangibleAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_27affee4-d875-42e7-acf5-48af85bcacf6" xlink:to="loc_us-gaap_CustomerRelatedIntangibleAssetsMember_8b13e234-3ee4-401f-83b5-2d21b7802e60" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TechnologyBasedIntangibleAssetsMember_e6351aef-4df3-4c78-b71e-cf40dc5be225" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TechnologyBasedIntangibleAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_27affee4-d875-42e7-acf5-48af85bcacf6" xlink:to="loc_us-gaap_TechnologyBasedIntangibleAssetsMember_e6351aef-4df3-4c78-b71e-cf40dc5be225" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_aaec3f00-919a-4b94-b1b9-aa4a9c5796b1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_2d1a2f73-95d1-48b7-b531-56d0d10655f1" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_aaec3f00-919a-4b94-b1b9-aa4a9c5796b1" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_aaec3f00-919a-4b94-b1b9-aa4a9c5796b1_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_aaec3f00-919a-4b94-b1b9-aa4a9c5796b1" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_aaec3f00-919a-4b94-b1b9-aa4a9c5796b1_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_4a8779f5-4e96-4b91-8a5b-64c17dbb0679" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_aaec3f00-919a-4b94-b1b9-aa4a9c5796b1" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_4a8779f5-4e96-4b91-8a5b-64c17dbb0679" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_SierraMonitorCorporationMember_c44254bb-000b-487b-9060-23397d5b1e83" xlink:href="msa-20200630.xsd#msa_SierraMonitorCorporationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_4a8779f5-4e96-4b91-8a5b-64c17dbb0679" xlink:to="loc_msa_SierraMonitorCorporationMember_c44254bb-000b-487b-9060-23397d5b1e83" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/AcquisitionsFairValueofAssetsAcquiredandLiabilitiesAssumedDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#AcquisitionsFairValueofAssetsAcquiredandLiabilitiesAssumedDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/AcquisitionsFairValueofAssetsAcquiredandLiabilitiesAssumedDetails" xlink:type="extended" id="iba98d5f49bb34638849e6d23d25750fd_AcquisitionsFairValueofAssetsAcquiredandLiabilitiesAssumedDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_8d65247c-84ee-4272-9e2b-97da0d4f744e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_d20bd594-3309-4279-8899-05145c28c1c1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8d65247c-84ee-4272-9e2b-97da0d4f744e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_d20bd594-3309-4279-8899-05145c28c1c1" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets_2f5ddae6-fe2a-4651-80b3-b075a98253af" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8d65247c-84ee-4272-9e2b-97da0d4f744e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets_2f5ddae6-fe2a-4651-80b3-b075a98253af" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment_784ea368-c89a-4c36-b413-6d794de2cedc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8d65247c-84ee-4272-9e2b-97da0d4f744e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment_784ea368-c89a-4c36-b413-6d794de2cedc" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_c4be22e0-6f7a-4d28-8e36-3367ddc8bfca" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8d65247c-84ee-4272-9e2b-97da0d4f744e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_c4be22e0-6f7a-4d28-8e36-3367ddc8bfca" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_b6b4033b-0f11-416e-9d06-366f91b02591" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8d65247c-84ee-4272-9e2b-97da0d4f744e" xlink:to="loc_us-gaap_Goodwill_b6b4033b-0f11-416e-9d06-366f91b02591" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_9930b999-5d2f-48af-8891-8be97fcc1a92" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8d65247c-84ee-4272-9e2b-97da0d4f744e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_9930b999-5d2f-48af-8891-8be97fcc1a92" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_ac6ace4d-4fe6-4732-ac20-b1e091230b87" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8d65247c-84ee-4272-9e2b-97da0d4f744e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_ac6ace4d-4fe6-4732-ac20-b1e091230b87" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_fe2729b7-41ec-4724-b20c-8010466b308e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8d65247c-84ee-4272-9e2b-97da0d4f744e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_fe2729b7-41ec-4724-b20c-8010466b308e" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_c1fc5eae-d9af-4a89-a80b-aba59c7b8bd1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8d65247c-84ee-4272-9e2b-97da0d4f744e" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_c1fc5eae-d9af-4a89-a80b-aba59c7b8bd1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c47de45c-9176-4f1a-a673-f6dc29ae2cc9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_c1fc5eae-d9af-4a89-a80b-aba59c7b8bd1" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c47de45c-9176-4f1a-a673-f6dc29ae2cc9" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c47de45c-9176-4f1a-a673-f6dc29ae2cc9_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c47de45c-9176-4f1a-a673-f6dc29ae2cc9" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c47de45c-9176-4f1a-a673-f6dc29ae2cc9_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_2be2c4d8-4639-47aa-b99c-c038db8e842e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c47de45c-9176-4f1a-a673-f6dc29ae2cc9" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_2be2c4d8-4639-47aa-b99c-c038db8e842e" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_b3f82aa0-69a1-43a2-b0a2-082856729353" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CustomerRelationshipsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_2be2c4d8-4639-47aa-b99c-c038db8e842e" xlink:to="loc_us-gaap_CustomerRelationshipsMember_b3f82aa0-69a1-43a2-b0a2-082856729353" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TechnologyBasedIntangibleAssetsMember_6eea293e-a218-419e-9273-d9a90eb3f352" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TechnologyBasedIntangibleAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_2be2c4d8-4639-47aa-b99c-c038db8e842e" xlink:to="loc_us-gaap_TechnologyBasedIntangibleAssetsMember_6eea293e-a218-419e-9273-d9a90eb3f352" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_8c4df004-e98e-4c10-8438-97c705a29e1f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_c1fc5eae-d9af-4a89-a80b-aba59c7b8bd1" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_8c4df004-e98e-4c10-8438-97c705a29e1f" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8c4df004-e98e-4c10-8438-97c705a29e1f_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_8c4df004-e98e-4c10-8438-97c705a29e1f" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8c4df004-e98e-4c10-8438-97c705a29e1f_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_568bbe1e-fc5f-4a86-a6a6-39e316bdba81" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_8c4df004-e98e-4c10-8438-97c705a29e1f" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_568bbe1e-fc5f-4a86-a6a6-39e316bdba81" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_msa_SierraMonitorCorporationMember_c61cb2fd-979a-4edb-a953-02c356dfa41a" xlink:href="msa-20200630.xsd#msa_SierraMonitorCorporationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_568bbe1e-fc5f-4a86-a6a6-39e316bdba81" xlink:to="loc_msa_SierraMonitorCorporationMember_c61cb2fd-979a-4edb-a953-02c356dfa41a" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.msasafety.com/role/AcquisitionsProFormaFinancialInformationDetails" xlink:type="simple" xlink:href="msa-20200630.xsd#AcquisitionsProFormaFinancialInformationDetails"/> |
| <link:definitionLink xlink:role="http://www.msasafety.com/role/AcquisitionsProFormaFinancialInformationDetails" xlink:type="extended" id="i46703cdf333b42fba0c7871b8d1ee529_AcquisitionsProFormaFinancialInformationDetails"/> |
| </link:linkbase> |