<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2022 Workiva-->
<!--r:e2064cb3-59d0-4602-959d-2d828ccdaf75,g:6b7b0678-fc7d-41fb-b1ea-dfa63b2aaefb-->
<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://ropertech.com/role/CondensedConsolidatedStatementsofChangesinStockholdersEquityunaudited" xlink:type="simple" xlink:href="rop-20220331.xsd#CondensedConsolidatedStatementsofChangesinStockholdersEquityunaudited"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/CondensedConsolidatedStatementsofChangesinStockholdersEquityunaudited" xlink:type="extended" id="i2b96d1a2bc1d4e938b742562c54d1934_CondensedConsolidatedStatementsofChangesinStockholdersEquityunaudited">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_4016ff7c-7236-4596-ad32-45fc5c0a264d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3f02fc4a-72c5-4d95-8055-1f9130de099f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4016ff7c-7236-4596-ad32-45fc5c0a264d" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3f02fc4a-72c5-4d95-8055-1f9130de099f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_b424cd83-579f-4734-967a-b31024dbcd27" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3f02fc4a-72c5-4d95-8055-1f9130de099f" xlink:to="loc_us-gaap_StockholdersEquity_b424cd83-579f-4734-967a-b31024dbcd27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_7fea2bf1-95f7-42bb-bc51-3ca90ea15f2d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3f02fc4a-72c5-4d95-8055-1f9130de099f" xlink:to="loc_us-gaap_NetIncomeLoss_7fea2bf1-95f7-42bb-bc51-3ca90ea15f2d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_65ac3c2a-fa4d-4ede-9d40-898f17e134a4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3f02fc4a-72c5-4d95-8055-1f9130de099f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_65ac3c2a-fa4d-4ede-9d40-898f17e134a4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_APICShareBasedPaymentArrangementCashSettlementForDispositions_c21f42c8-09bb-4c0f-b1da-bc5291546ed0" xlink:href="rop-20220331.xsd#rop_APICShareBasedPaymentArrangementCashSettlementForDispositions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3f02fc4a-72c5-4d95-8055-1f9130de099f" xlink:to="loc_rop_APICShareBasedPaymentArrangementCashSettlementForDispositions_c21f42c8-09bb-4c0f-b1da-bc5291546ed0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_a63e3044-499d-464d-9fd4-4637a3295740" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3f02fc4a-72c5-4d95-8055-1f9130de099f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_a63e3044-499d-464d-9fd4-4637a3295740" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_118639c0-de13-4a12-a142-d25cae3dabeb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3f02fc4a-72c5-4d95-8055-1f9130de099f" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_118639c0-de13-4a12-a142-d25cae3dabeb" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_b80099b3-15a8-4151-9a1b-2e7883a25745" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3f02fc4a-72c5-4d95-8055-1f9130de099f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_b80099b3-15a8-4151-9a1b-2e7883a25745" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_492fd237-e8f0-49bb-88f4-d62f38a1f012" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3f02fc4a-72c5-4d95-8055-1f9130de099f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_492fd237-e8f0-49bb-88f4-d62f38a1f012" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock_506a459b-0e88-4958-996c-b8cf81c23cab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3f02fc4a-72c5-4d95-8055-1f9130de099f" xlink:to="loc_us-gaap_DividendsCommonStock_506a459b-0e88-4958-996c-b8cf81c23cab" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_4d63017f-e01a-42f8-9251-a01da532b342" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_53b2c5a4-82ff-40c0-abc1-329998a3e254" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_4016ff7c-7236-4596-ad32-45fc5c0a264d" xlink:to="loc_us-gaap_StatementTable_53b2c5a4-82ff-40c0-abc1-329998a3e254" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_dbc117f7-cffc-4573-8114-a4e04714b505" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_53b2c5a4-82ff-40c0-abc1-329998a3e254" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_dbc117f7-cffc-4573-8114-a4e04714b505" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_dbc117f7-cffc-4573-8114-a4e04714b505_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_dbc117f7-cffc-4573-8114-a4e04714b505" xlink:to="loc_us-gaap_EquityComponentDomain_dbc117f7-cffc-4573-8114-a4e04714b505_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_a79d6294-a8fc-4c1d-8aa5-390012339e58" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_dbc117f7-cffc-4573-8114-a4e04714b505" xlink:to="loc_us-gaap_EquityComponentDomain_a79d6294-a8fc-4c1d-8aa5-390012339e58" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_b216dfb5-ad9c-41dc-905c-056d54f2900a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a79d6294-a8fc-4c1d-8aa5-390012339e58" xlink:to="loc_us-gaap_CommonStockMember_b216dfb5-ad9c-41dc-905c-056d54f2900a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_baa933ec-06de-4334-aa17-db56151d220e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a79d6294-a8fc-4c1d-8aa5-390012339e58" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_baa933ec-06de-4334-aa17-db56151d220e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_80305252-8105-46af-8b66-ceac1e09e49e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a79d6294-a8fc-4c1d-8aa5-390012339e58" xlink:to="loc_us-gaap_RetainedEarningsMember_80305252-8105-46af-8b66-ceac1e09e49e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_de36a37c-1fde-4043-8945-e55eb62f5c0c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a79d6294-a8fc-4c1d-8aa5-390012339e58" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_de36a37c-1fde-4043-8945-e55eb62f5c0c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockMember_516cd8d9-f996-490a-8fee-ffc2110f1466" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a79d6294-a8fc-4c1d-8aa5-390012339e58" xlink:to="loc_us-gaap_TreasuryStockMember_516cd8d9-f996-490a-8fee-ffc2110f1466" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/BusinessAcquisitionsandDispositionDetails" xlink:type="simple" xlink:href="rop-20220331.xsd#BusinessAcquisitionsandDispositionDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/BusinessAcquisitionsandDispositionDetails" xlink:type="extended" id="i4ffa9fcc3683486bbbe3c4e379829c6e_BusinessAcquisitionsandDispositionDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_3c8671c5-8459-40fd-81aa-ca35ee307c88" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_4aeddd90-8f8b-4dea-89fd-c78cda23ea2c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_3c8671c5-8459-40fd-81aa-ca35ee307c88" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_4aeddd90-8f8b-4dea-89fd-c78cda23ea2c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_dbd41f85-70eb-462f-b586-890146980859" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_3c8671c5-8459-40fd-81aa-ca35ee307c88" xlink:to="loc_us-gaap_Goodwill_dbd41f85-70eb-462f-b586-890146980859" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_d834b717-4fad-4b24-9b1e-a48beab0c00e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_3c8671c5-8459-40fd-81aa-ca35ee307c88" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_d834b717-4fad-4b24-9b1e-a48beab0c00e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_6739e3b8-babc-4c6f-9c45-ddb8e5509a94" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_3c8671c5-8459-40fd-81aa-ca35ee307c88" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_6739e3b8-babc-4c6f-9c45-ddb8e5509a94" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromMinorityShareholders_47d6b3ef-2abb-4c8a-b46a-a751270518f4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromMinorityShareholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_3c8671c5-8459-40fd-81aa-ca35ee307c88" xlink:to="loc_us-gaap_ProceedsFromMinorityShareholders_47d6b3ef-2abb-4c8a-b46a-a751270518f4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfInvestments_1bfab3a0-9090-4979-a6c3-0c7fa9f47c13" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossOnSaleOfInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_3c8671c5-8459-40fd-81aa-ca35ee307c88" xlink:to="loc_us-gaap_GainLossOnSaleOfInvestments_1bfab3a0-9090-4979-a6c3-0c7fa9f47c13" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_244164c9-bd89-434d-9d1a-2b62d7593214" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_3c8671c5-8459-40fd-81aa-ca35ee307c88" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_244164c9-bd89-434d-9d1a-2b62d7593214" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_5ebadc2b-628f-48ce-83d7-0ecdcc94c7fa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_244164c9-bd89-434d-9d1a-2b62d7593214" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_5ebadc2b-628f-48ce-83d7-0ecdcc94c7fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_5ebadc2b-628f-48ce-83d7-0ecdcc94c7fa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_5ebadc2b-628f-48ce-83d7-0ecdcc94c7fa" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_5ebadc2b-628f-48ce-83d7-0ecdcc94c7fa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_32995c2f-6427-4807-80b2-da118164c946" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_5ebadc2b-628f-48ce-83d7-0ecdcc94c7fa" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_32995c2f-6427-4807-80b2-da118164c946" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember_6148dcfd-249f-4fe3-bda4-00e03e5bc4cf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_32995c2f-6427-4807-80b2-da118164c946" xlink:to="loc_us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember_6148dcfd-249f-4fe3-bda4-00e03e5bc4cf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9eda477a-91e9-47bd-bfe0-86a466e24490" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_244164c9-bd89-434d-9d1a-2b62d7593214" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9eda477a-91e9-47bd-bfe0-86a466e24490" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9eda477a-91e9-47bd-bfe0-86a466e24490_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9eda477a-91e9-47bd-bfe0-86a466e24490" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9eda477a-91e9-47bd-bfe0-86a466e24490_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_3966a74f-4b44-4eb6-b024-30eda5d63fe9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9eda477a-91e9-47bd-bfe0-86a466e24490" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_3966a74f-4b44-4eb6-b024-30eda5d63fe9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_f5f9e22b-045b-4846-9f12-93ffb2c181c8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_3966a74f-4b44-4eb6-b024-30eda5d63fe9" xlink:to="loc_us-gaap_CustomerRelationshipsMember_f5f9e22b-045b-4846-9f12-93ffb2c181c8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TechnologyBasedIntangibleAssetsMember_87841cc8-395f-4847-9617-6164bad52c9d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TechnologyBasedIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_3966a74f-4b44-4eb6-b024-30eda5d63fe9" xlink:to="loc_us-gaap_TechnologyBasedIntangibleAssetsMember_87841cc8-395f-4847-9617-6164bad52c9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_84795973-c8be-42d4-a1be-675262a4c458" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_244164c9-bd89-434d-9d1a-2b62d7593214" xlink:to="loc_srt_OwnershipAxis_84795973-c8be-42d4-a1be-675262a4c458" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_84795973-c8be-42d4-a1be-675262a4c458_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_84795973-c8be-42d4-a1be-675262a4c458" xlink:to="loc_srt_OwnershipDomain_84795973-c8be-42d4-a1be-675262a4c458_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_6c09fd08-e1df-42ea-9808-c6e69db36271" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_84795973-c8be-42d4-a1be-675262a4c458" xlink:to="loc_srt_OwnershipDomain_6c09fd08-e1df-42ea-9808-c6e69db36271" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SedaruIncMember_3b88054b-3012-40da-8d17-a86309c1d592" xlink:href="rop-20220331.xsd#rop_SedaruIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_6c09fd08-e1df-42ea-9808-c6e69db36271" xlink:to="loc_rop_SedaruIncMember_3b88054b-3012-40da-8d17-a86309c1d592" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/DiscontinuedOperationsNarrativeDetails" xlink:type="simple" xlink:href="rop-20220331.xsd#DiscontinuedOperationsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/DiscontinuedOperationsNarrativeDetails" xlink:type="extended" id="i3c4c7fd8ada243fd80d8df3ab9f439d2_DiscontinuedOperationsNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_2b205235-baa2-4e7b-8d08-3197f77f428d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration_76be31a2-ecd8-4c69-9fb6-dfcbc1ce3622" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_2b205235-baa2-4e7b-8d08-3197f77f428d" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration_76be31a2-ecd8-4c69-9fb6-dfcbc1ce3622" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_8f010b2c-0ac8-4934-811e-a4703c2894ff" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_2b205235-baa2-4e7b-8d08-3197f77f428d" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_8f010b2c-0ac8-4934-811e-a4703c2894ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation_e676a189-4f67-40e5-880c-d04ef81c3190" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_2b205235-baa2-4e7b-8d08-3197f77f428d" xlink:to="loc_us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation_e676a189-4f67-40e5-880c-d04ef81c3190" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_dfedb409-1d5d-4da8-b000-18eaab0d7926" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_2b205235-baa2-4e7b-8d08-3197f77f428d" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_dfedb409-1d5d-4da8-b000-18eaab0d7926" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_1aba9c8e-3bbf-4b83-b1ae-600f5249444d" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_dfedb409-1d5d-4da8-b000-18eaab0d7926" xlink:to="loc_srt_CounterpartyNameAxis_1aba9c8e-3bbf-4b83-b1ae-600f5249444d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_1aba9c8e-3bbf-4b83-b1ae-600f5249444d_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_1aba9c8e-3bbf-4b83-b1ae-600f5249444d" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_1aba9c8e-3bbf-4b83-b1ae-600f5249444d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_c57a4684-935b-45cf-9074-7594b0920c20" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_1aba9c8e-3bbf-4b83-b1ae-600f5249444d" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_c57a4684-935b-45cf-9074-7594b0920c20" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SingaporeTechnologiesEngineeringLtdAffiliateMember_a194b305-f173-4b13-8695-7dc4ec5d232f" xlink:href="rop-20220331.xsd#rop_SingaporeTechnologiesEngineeringLtdAffiliateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_c57a4684-935b-45cf-9074-7594b0920c20" xlink:to="loc_rop_SingaporeTechnologiesEngineeringLtdAffiliateMember_a194b305-f173-4b13-8695-7dc4ec5d232f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_EddyfiNDTIncMember_ff70a1e2-2ac1-4aed-a0ef-2021686eb3ed" xlink:href="rop-20220331.xsd#rop_EddyfiNDTIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_c57a4684-935b-45cf-9074-7594b0920c20" xlink:to="loc_rop_EddyfiNDTIncMember_ff70a1e2-2ac1-4aed-a0ef-2021686eb3ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_4da72a35-777c-451b-8f00-76c372d942c6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupClassificationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_dfedb409-1d5d-4da8-b000-18eaab0d7926" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_4da72a35-777c-451b-8f00-76c372d942c6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_4da72a35-777c-451b-8f00-76c372d942c6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_4da72a35-777c-451b-8f00-76c372d942c6" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_4da72a35-777c-451b-8f00-76c372d942c6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_7972672d-c310-4bda-b96f-38dfe3ff141e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_4da72a35-777c-451b-8f00-76c372d942c6" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_7972672d-c310-4bda-b96f-38dfe3ff141e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_a5c7d78a-a747-4d26-bee7-ab007bde045c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DiscontinuedOperationsDisposedOfBySaleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_7972672d-c310-4bda-b96f-38dfe3ff141e" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_a5c7d78a-a747-4d26-bee7-ab007bde045c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_0f8d3fef-ddb6-4a92-b694-39add0d47d5b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_dfedb409-1d5d-4da8-b000-18eaab0d7926" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_0f8d3fef-ddb6-4a92-b694-39add0d47d5b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_0f8d3fef-ddb6-4a92-b694-39add0d47d5b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_0f8d3fef-ddb6-4a92-b694-39add0d47d5b" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_0f8d3fef-ddb6-4a92-b694-39add0d47d5b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_8fbdf4f8-6c4b-4702-9227-980ac9a553da" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_0f8d3fef-ddb6-4a92-b694-39add0d47d5b" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_8fbdf4f8-6c4b-4702-9227-980ac9a553da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_TransCoreMember_7588946b-62cc-4732-a8ea-f1e8679e995c" xlink:href="rop-20220331.xsd#rop_TransCoreMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_8fbdf4f8-6c4b-4702-9227-980ac9a553da" xlink:to="loc_rop_TransCoreMember_7588946b-62cc-4732-a8ea-f1e8679e995c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_ZetecMember_919ea840-6054-4d72-a99f-991b0d46184d" xlink:href="rop-20220331.xsd#rop_ZetecMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_8fbdf4f8-6c4b-4702-9227-980ac9a553da" xlink:to="loc_rop_ZetecMember_919ea840-6054-4d72-a99f-991b0d46184d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_CivcoRadiotherapyMember_faf9245a-205c-4df1-a609-702736ff6b80" xlink:href="rop-20220331.xsd#rop_CivcoRadiotherapyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_8fbdf4f8-6c4b-4702-9227-980ac9a553da" xlink:to="loc_rop_CivcoRadiotherapyMember_faf9245a-205c-4df1-a609-702736ff6b80" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/DiscontinuedOperationsScheduleofAssetsandLiabilitiesFromDiscontinuedOperationsDetails" xlink:type="simple" xlink:href="rop-20220331.xsd#DiscontinuedOperationsScheduleofAssetsandLiabilitiesFromDiscontinuedOperationsDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/DiscontinuedOperationsScheduleofAssetsandLiabilitiesFromDiscontinuedOperationsDetails" xlink:type="extended" id="icf0f74e44419414ea8d2647ad8dab303_DiscontinuedOperationsScheduleofAssetsandLiabilitiesFromDiscontinuedOperationsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_da2ffa44-bbcb-498d-8f8c-3eb2884645b7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationAbstract_8cf5ad9e-8142-4525-bec5-b295b79b642c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_da2ffa44-bbcb-498d-8f8c-3eb2884645b7" xlink:to="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationAbstract_8cf5ad9e-8142-4525-bec5-b295b79b642c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet_999d190f-4f6f-4464-a212-2e88ea73da7e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationAbstract_8cf5ad9e-8142-4525-bec5-b295b79b642c" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet_999d190f-4f6f-4464-a212-2e88ea73da7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationInventory1_7906935c-7d3c-4e37-8cc8-920ec08e26d0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationInventory1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationAbstract_8cf5ad9e-8142-4525-bec5-b295b79b642c" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationInventory1_7906935c-7d3c-4e37-8cc8-920ec08e26d0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_DisposalGroupIncludingDiscontinuedOperationAccountsUnbilledReceivableNet_deeb1001-beca-4585-94d5-beddbbef2555" xlink:href="rop-20220331.xsd#rop_DisposalGroupIncludingDiscontinuedOperationAccountsUnbilledReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationAbstract_8cf5ad9e-8142-4525-bec5-b295b79b642c" xlink:to="loc_rop_DisposalGroupIncludingDiscontinuedOperationAccountsUnbilledReceivableNet_deeb1001-beca-4585-94d5-beddbbef2555" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationGoodwillCurrent_047bb378-502e-4808-93ae-425a3289d05a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationGoodwillCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationAbstract_8cf5ad9e-8142-4525-bec5-b295b79b642c" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationGoodwillCurrent_047bb378-502e-4808-93ae-425a3289d05a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationIntangibleAssetsCurrent_3e23fb9d-5399-4b01-9eb0-70e807fc0cb8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationIntangibleAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationAbstract_8cf5ad9e-8142-4525-bec5-b295b79b642c" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationIntangibleAssetsCurrent_3e23fb9d-5399-4b01-9eb0-70e807fc0cb8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets_6224000a-6142-4bed-95d4-94037658383b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationAbstract_8cf5ad9e-8142-4525-bec5-b295b79b642c" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets_6224000a-6142-4bed-95d4-94037658383b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent_a376588c-a2c2-4a58-909c-b21bea251197" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationAbstract_8cf5ad9e-8142-4525-bec5-b295b79b642c" xlink:to="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent_a376588c-a2c2-4a58-909c-b21bea251197" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationAbstract_c3ee5ab5-cc81-40ad-ab6b-7620bbc90476" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_da2ffa44-bbcb-498d-8f8c-3eb2884645b7" xlink:to="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationAbstract_c3ee5ab5-cc81-40ad-ab6b-7620bbc90476" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsPayable_9ebacba9-7c2f-46dc-8efd-216c1ae9960e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationAbstract_c3ee5ab5-cc81-40ad-ab6b-7620bbc90476" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsPayable_9ebacba9-7c2f-46dc-8efd-216c1ae9960e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedLiabilities_6d92e393-0f08-4936-86a3-b300b62719bd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationAbstract_c3ee5ab5-cc81-40ad-ab6b-7620bbc90476" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedLiabilities_6d92e393-0f08-4936-86a3-b300b62719bd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredTaxLiabilities_f94c04cd-3625-484b-9ea8-8cd388e1c9bf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredTaxLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationAbstract_c3ee5ab5-cc81-40ad-ab6b-7620bbc90476" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredTaxLiabilities_f94c04cd-3625-484b-9ea8-8cd388e1c9bf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentLiabilities_14239baa-e115-4472-b0cf-da03ca4ea89c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationAbstract_c3ee5ab5-cc81-40ad-ab6b-7620bbc90476" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentLiabilities_14239baa-e115-4472-b0cf-da03ca4ea89c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent_e8c8f8d2-7484-4e96-a616-6afed0f822cc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationAbstract_c3ee5ab5-cc81-40ad-ab6b-7620bbc90476" xlink:to="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent_e8c8f8d2-7484-4e96-a616-6afed0f822cc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_b41b9feb-463e-4118-8856-7e404aa99b62" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_da2ffa44-bbcb-498d-8f8c-3eb2884645b7" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_b41b9feb-463e-4118-8856-7e404aa99b62" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_b41bfe85-e6db-4bdb-837f-1c6beacd2f50" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupClassificationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_b41b9feb-463e-4118-8856-7e404aa99b62" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_b41bfe85-e6db-4bdb-837f-1c6beacd2f50" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_b41bfe85-e6db-4bdb-837f-1c6beacd2f50_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_b41bfe85-e6db-4bdb-837f-1c6beacd2f50" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_b41bfe85-e6db-4bdb-837f-1c6beacd2f50_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_5e86a16c-da75-4ce7-a3d6-e6efa888650f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_b41bfe85-e6db-4bdb-837f-1c6beacd2f50" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_5e86a16c-da75-4ce7-a3d6-e6efa888650f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationsHeldForSaleOrDisposedOfBySaleMember_bee155d7-d2e9-4c32-9f1b-629c099b01b0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DiscontinuedOperationsHeldForSaleOrDisposedOfBySaleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_5e86a16c-da75-4ce7-a3d6-e6efa888650f" xlink:to="loc_us-gaap_DiscontinuedOperationsHeldForSaleOrDisposedOfBySaleMember_bee155d7-d2e9-4c32-9f1b-629c099b01b0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_9eb698a5-c71c-42ab-aced-ef06a02b50db" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_b41b9feb-463e-4118-8856-7e404aa99b62" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_9eb698a5-c71c-42ab-aced-ef06a02b50db" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_9eb698a5-c71c-42ab-aced-ef06a02b50db_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_9eb698a5-c71c-42ab-aced-ef06a02b50db" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_9eb698a5-c71c-42ab-aced-ef06a02b50db_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_03a24d7c-8190-4b35-996e-0998a501d23e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_9eb698a5-c71c-42ab-aced-ef06a02b50db" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_03a24d7c-8190-4b35-996e-0998a501d23e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_TransCoreHoldingsIncZetecAndCivcoRadiotherapyMember_564c1937-e312-447d-ac6e-20ca60bc4c9b" xlink:href="rop-20220331.xsd#rop_TransCoreHoldingsIncZetecAndCivcoRadiotherapyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_03a24d7c-8190-4b35-996e-0998a501d23e" xlink:to="loc_rop_TransCoreHoldingsIncZetecAndCivcoRadiotherapyMember_564c1937-e312-447d-ac6e-20ca60bc4c9b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/DiscontinuedOperationsScheduleofAmountsIncludedinDiscontinuedOperationsDetails" xlink:type="simple" xlink:href="rop-20220331.xsd#DiscontinuedOperationsScheduleofAmountsIncludedinDiscontinuedOperationsDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/DiscontinuedOperationsScheduleofAmountsIncludedinDiscontinuedOperationsDetails" xlink:type="extended" id="ifc3042bfe5d74de9a4560f09c41d5c43_DiscontinuedOperationsScheduleofAmountsIncludedinDiscontinuedOperationsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_8aabdee7-c1c3-4796-8822-e0ad28edf6f0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue_0ae53c50-fd01-4d92-a989-81b01a02b99a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_8aabdee7-c1c3-4796-8822-e0ad28edf6f0" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue_0ae53c50-fd01-4d92-a989-81b01a02b99a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold_900fe0ec-2ab5-49fa-b0c5-6ec98c6897d0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_8aabdee7-c1c3-4796-8822-e0ad28edf6f0" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold_900fe0ec-2ab5-49fa-b0c5-6ec98c6897d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss_64ba006f-da3e-4ad1-b0d3-53351cac86c5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_8aabdee7-c1c3-4796-8822-e0ad28edf6f0" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss_64ba006f-da3e-4ad1-b0d3-53351cac86c5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense_ca749872-d3e2-409d-81b4-fc006412efe6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_8aabdee7-c1c3-4796-8822-e0ad28edf6f0" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense_ca749872-d3e2-409d-81b4-fc006412efe6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss_a2a7c78a-0f39-4b8b-8b9c-ef537ebf3e76" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_8aabdee7-c1c3-4796-8822-e0ad28edf6f0" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss_a2a7c78a-0f39-4b8b-8b9c-ef537ebf3e76" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_DisposalGroupIncludingDiscontinuedOperationsIncomeExpenseNotIdentifiedAsMajorNet_fd20cb01-3b2b-4dcf-a712-bfe34f266368" xlink:href="rop-20220331.xsd#rop_DisposalGroupIncludingDiscontinuedOperationsIncomeExpenseNotIdentifiedAsMajorNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_8aabdee7-c1c3-4796-8822-e0ad28edf6f0" xlink:to="loc_rop_DisposalGroupIncludingDiscontinuedOperationsIncomeExpenseNotIdentifiedAsMajorNet_fd20cb01-3b2b-4dcf-a712-bfe34f266368" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_03c1cac6-a86c-41a1-81d4-0082f7bc72fc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_8aabdee7-c1c3-4796-8822-e0ad28edf6f0" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_03c1cac6-a86c-41a1-81d4-0082f7bc72fc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation_cf4ee1fc-452f-43e3-8793-83ae1871fb91" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_8aabdee7-c1c3-4796-8822-e0ad28edf6f0" xlink:to="loc_us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation_cf4ee1fc-452f-43e3-8793-83ae1871fb91" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_26ea8c7b-3cd9-4a27-8229-277a2ba391af" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_8aabdee7-c1c3-4796-8822-e0ad28edf6f0" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_26ea8c7b-3cd9-4a27-8229-277a2ba391af" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_6edcdf7d-038e-4a46-818b-30e9f0a212df" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_8aabdee7-c1c3-4796-8822-e0ad28edf6f0" xlink:to="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_6edcdf7d-038e-4a46-818b-30e9f0a212df" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_326a5cbe-f640-4d0c-a8e8-c607d012fa8d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_8aabdee7-c1c3-4796-8822-e0ad28edf6f0" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_326a5cbe-f640-4d0c-a8e8-c607d012fa8d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_DisposalGroupIncludingDiscontinuedOperationStockBasedCompensationExpense_2de715ae-1faf-4c7d-ab0a-19d86a39c8b6" xlink:href="rop-20220331.xsd#rop_DisposalGroupIncludingDiscontinuedOperationStockBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_8aabdee7-c1c3-4796-8822-e0ad28edf6f0" xlink:to="loc_rop_DisposalGroupIncludingDiscontinuedOperationStockBasedCompensationExpense_2de715ae-1faf-4c7d-ab0a-19d86a39c8b6" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization_34af43b2-9077-4cde-a56b-2d06d40e7d2e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_8aabdee7-c1c3-4796-8822-e0ad28edf6f0" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization_34af43b2-9077-4cde-a56b-2d06d40e7d2e" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_b1f4721c-234c-412b-8ea1-1b3de751476a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_8aabdee7-c1c3-4796-8822-e0ad28edf6f0" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_b1f4721c-234c-412b-8ea1-1b3de751476a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_1490fea0-27d7-4ff1-9e0e-82910e6538b9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupClassificationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_b1f4721c-234c-412b-8ea1-1b3de751476a" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_1490fea0-27d7-4ff1-9e0e-82910e6538b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_1490fea0-27d7-4ff1-9e0e-82910e6538b9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_1490fea0-27d7-4ff1-9e0e-82910e6538b9" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_1490fea0-27d7-4ff1-9e0e-82910e6538b9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_0a65f785-15f8-4eef-bfb3-803a3780b05a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_1490fea0-27d7-4ff1-9e0e-82910e6538b9" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_0a65f785-15f8-4eef-bfb3-803a3780b05a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationsHeldForSaleOrDisposedOfBySaleMember_2459ee44-ec3d-4bf6-8a99-083e35ecde35" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DiscontinuedOperationsHeldForSaleOrDisposedOfBySaleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_0a65f785-15f8-4eef-bfb3-803a3780b05a" xlink:to="loc_us-gaap_DiscontinuedOperationsHeldForSaleOrDisposedOfBySaleMember_2459ee44-ec3d-4bf6-8a99-083e35ecde35" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_6037af45-62e6-4af1-ace5-c27dea7d3954" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_b1f4721c-234c-412b-8ea1-1b3de751476a" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_6037af45-62e6-4af1-ace5-c27dea7d3954" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_6037af45-62e6-4af1-ace5-c27dea7d3954_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_6037af45-62e6-4af1-ace5-c27dea7d3954" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_6037af45-62e6-4af1-ace5-c27dea7d3954_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_ac61d3d1-c9fb-4e7b-88f8-4539ae6552bd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_6037af45-62e6-4af1-ace5-c27dea7d3954" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_ac61d3d1-c9fb-4e7b-88f8-4539ae6552bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_TransCoreHoldingsIncZetecAndCivcoRadiotherapyMember_524a28ca-b2f1-4ec8-8d8a-155c18225e22" xlink:href="rop-20220331.xsd#rop_TransCoreHoldingsIncZetecAndCivcoRadiotherapyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_ac61d3d1-c9fb-4e7b-88f8-4539ae6552bd" xlink:to="loc_rop_TransCoreHoldingsIncZetecAndCivcoRadiotherapyMember_524a28ca-b2f1-4ec8-8d8a-155c18225e22" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_CivcoRadiotherapyMember_83446119-afed-4b9e-ad40-12d76431adc0" xlink:href="rop-20220331.xsd#rop_CivcoRadiotherapyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_ac61d3d1-c9fb-4e7b-88f8-4539ae6552bd" xlink:to="loc_rop_CivcoRadiotherapyMember_83446119-afed-4b9e-ad40-12d76431adc0" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/StockBasedCompensationNarrativeDetails" xlink:type="simple" xlink:href="rop-20220331.xsd#StockBasedCompensationNarrativeDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/StockBasedCompensationNarrativeDetails" xlink:type="extended" id="i48e196c316da4ae8a82391a42ff1c623_StockBasedCompensationNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_09340a46-76e6-47bb-9a03-19f37e556441" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_86525832-9ef4-4ef0-b187-392c8c84b96f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_09340a46-76e6-47bb-9a03-19f37e556441" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_86525832-9ef4-4ef0-b187-392c8c84b96f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_e4f2cf18-c74b-4ed7-b51e-1131cf354faf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_09340a46-76e6-47bb-9a03-19f37e556441" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_e4f2cf18-c74b-4ed7-b51e-1131cf354faf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_8e6c5c9e-cb42-435f-b801-026449932b34" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_09340a46-76e6-47bb-9a03-19f37e556441" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_8e6c5c9e-cb42-435f-b801-026449932b34" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_8c85973f-35c6-42c1-99bf-943774fb0c0c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_09340a46-76e6-47bb-9a03-19f37e556441" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_8c85973f-35c6-42c1-99bf-943774fb0c0c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_29725dfc-490a-46f5-ae33-cec1ea49efdc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_09340a46-76e6-47bb-9a03-19f37e556441" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_29725dfc-490a-46f5-ae33-cec1ea49efdc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_27ee5658-3577-4134-961e-6dcc23d09c0b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_09340a46-76e6-47bb-9a03-19f37e556441" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_27ee5658-3577-4134-961e-6dcc23d09c0b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_86f9e9cb-7e6d-4c06-bdc5-75089b82c25b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_09340a46-76e6-47bb-9a03-19f37e556441" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_86f9e9cb-7e6d-4c06-bdc5-75089b82c25b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageVestDateFairValue_aa6e66bf-4af2-40cc-8257-f7fa97573ca1" xlink:href="rop-20220331.xsd#rop_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageVestDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_09340a46-76e6-47bb-9a03-19f37e556441" xlink:to="loc_rop_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageVestDateFairValue_aa6e66bf-4af2-40cc-8257-f7fa97573ca1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_f1c107ec-2ad3-46b8-ad57-afe43be0afa0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_09340a46-76e6-47bb-9a03-19f37e556441" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_f1c107ec-2ad3-46b8-ad57-afe43be0afa0" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate_8797840d-0629-4f48-aeed-f0294511710e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_09340a46-76e6-47bb-9a03-19f37e556441" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate_8797840d-0629-4f48-aeed-f0294511710e" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_5172218a-5891-4718-875b-8bdceed0626e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_09340a46-76e6-47bb-9a03-19f37e556441" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_5172218a-5891-4718-875b-8bdceed0626e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_StockPurchasedDuringPeriodValueEmployeeStockPurchasePlans_013e1d1b-c591-43c1-a575-d17e47687b6b" xlink:href="rop-20220331.xsd#rop_StockPurchasedDuringPeriodValueEmployeeStockPurchasePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_09340a46-76e6-47bb-9a03-19f37e556441" xlink:to="loc_rop_StockPurchasedDuringPeriodValueEmployeeStockPurchasePlans_013e1d1b-c591-43c1-a575-d17e47687b6b" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6e80a220-ad4d-48a4-b2d4-4a160b9cadaa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_09340a46-76e6-47bb-9a03-19f37e556441" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6e80a220-ad4d-48a4-b2d4-4a160b9cadaa" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_89b18dc4-04d9-480b-9527-e9cf46c4970b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6e80a220-ad4d-48a4-b2d4-4a160b9cadaa" xlink:to="loc_us-gaap_AwardTypeAxis_89b18dc4-04d9-480b-9527-e9cf46c4970b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_89b18dc4-04d9-480b-9527-e9cf46c4970b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_89b18dc4-04d9-480b-9527-e9cf46c4970b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_89b18dc4-04d9-480b-9527-e9cf46c4970b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3951704a-1743-4552-bcb8-852a2badb5ff" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_89b18dc4-04d9-480b-9527-e9cf46c4970b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3951704a-1743-4552-bcb8-852a2badb5ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_077cc03a-57bd-4884-a641-2197c98305f2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3951704a-1743-4552-bcb8-852a2badb5ff" xlink:to="loc_us-gaap_EmployeeStockOptionMember_077cc03a-57bd-4884-a641-2197c98305f2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_80f45fbc-a9f9-4b7a-a487-9bbe15e2c540" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3951704a-1743-4552-bcb8-852a2badb5ff" xlink:to="loc_us-gaap_RestrictedStockMember_80f45fbc-a9f9-4b7a-a487-9bbe15e2c540" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_e4817219-180b-4bfd-8d3f-c0fc062e3533" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3951704a-1743-4552-bcb8-852a2badb5ff" xlink:to="loc_us-gaap_EmployeeStockMember_e4817219-180b-4bfd-8d3f-c0fc062e3533" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/GoodwillandOtherIntangibleAssetsGoodwillDetails" xlink:type="simple" xlink:href="rop-20220331.xsd#GoodwillandOtherIntangibleAssetsGoodwillDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/GoodwillandOtherIntangibleAssetsGoodwillDetails" xlink:type="extended" id="i6deb840b68494863ab8c8c4059270b94_GoodwillandOtherIntangibleAssetsGoodwillDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_d3f97288-6d9b-4b18-9d30-255be7571611" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_6b774142-0885-429d-9ab5-f9e530ebc6c7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_d3f97288-6d9b-4b18-9d30-255be7571611" xlink:to="loc_us-gaap_GoodwillRollForward_6b774142-0885-429d-9ab5-f9e530ebc6c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_1e9bdcbe-5c8f-43b1-8423-1d4980912c8f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_6b774142-0885-429d-9ab5-f9e530ebc6c7" xlink:to="loc_us-gaap_Goodwill_1e9bdcbe-5c8f-43b1-8423-1d4980912c8f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_16d20ce8-5fa4-409a-987d-c48e05be9b4f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_6b774142-0885-429d-9ab5-f9e530ebc6c7" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_16d20ce8-5fa4-409a-987d-c48e05be9b4f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillOtherIncreaseDecrease_1f30db4a-7ac0-4a1b-9c1a-970bd7089039" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillOtherIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_6b774142-0885-429d-9ab5-f9e530ebc6c7" xlink:to="loc_us-gaap_GoodwillOtherIncreaseDecrease_1f30db4a-7ac0-4a1b-9c1a-970bd7089039" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments_6dbfe597-05ff-4fdd-a5d4-065164271384" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_6b774142-0885-429d-9ab5-f9e530ebc6c7" xlink:to="loc_us-gaap_GoodwillTranslationAndPurchaseAccountingAdjustments_6dbfe597-05ff-4fdd-a5d4-065164271384" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_2fbad0a3-b7de-4d11-9e00-dc4d80aaad1a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Goodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_e286a201-8dc0-4ef6-bf5e-34b94a091a13" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_d3f97288-6d9b-4b18-9d30-255be7571611" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_e286a201-8dc0-4ef6-bf5e-34b94a091a13" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_819b4f34-3593-4c62-aea9-5c2ef0e665a7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_e286a201-8dc0-4ef6-bf5e-34b94a091a13" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_819b4f34-3593-4c62-aea9-5c2ef0e665a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_819b4f34-3593-4c62-aea9-5c2ef0e665a7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_819b4f34-3593-4c62-aea9-5c2ef0e665a7" xlink:to="loc_us-gaap_SegmentDomain_819b4f34-3593-4c62-aea9-5c2ef0e665a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_569f1654-5912-46c3-ba0c-0af71af8431f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_819b4f34-3593-4c62-aea9-5c2ef0e665a7" xlink:to="loc_us-gaap_SegmentDomain_569f1654-5912-46c3-ba0c-0af71af8431f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_ApplicationSoftwareSegmentMember_990866bc-87a3-4a34-b85d-539459505a09" xlink:href="rop-20220331.xsd#rop_ApplicationSoftwareSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_569f1654-5912-46c3-ba0c-0af71af8431f" xlink:to="loc_rop_ApplicationSoftwareSegmentMember_990866bc-87a3-4a34-b85d-539459505a09" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_NetworkSoftwareAndSystemsSegmentMember_af92052a-6810-4bcb-a0d0-32a2c1308e44" xlink:href="rop-20220331.xsd#rop_NetworkSoftwareAndSystemsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_569f1654-5912-46c3-ba0c-0af71af8431f" xlink:to="loc_rop_NetworkSoftwareAndSystemsSegmentMember_af92052a-6810-4bcb-a0d0-32a2c1308e44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_MeasurementAndAnalyticalSolutionsSegmentMember_f35bd4cb-84fc-49ff-96de-76ac14de3e33" xlink:href="rop-20220331.xsd#rop_MeasurementAndAnalyticalSolutionsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_569f1654-5912-46c3-ba0c-0af71af8431f" xlink:to="loc_rop_MeasurementAndAnalyticalSolutionsSegmentMember_f35bd4cb-84fc-49ff-96de-76ac14de3e33" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_ProcessTechnologiesSegmentMember_76149343-9706-4cca-b25a-7841ca4f1369" xlink:href="rop-20220331.xsd#rop_ProcessTechnologiesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_569f1654-5912-46c3-ba0c-0af71af8431f" xlink:to="loc_rop_ProcessTechnologiesSegmentMember_76149343-9706-4cca-b25a-7841ca4f1369" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/GoodwillandOtherIntangibleAssetsOtherIntangibleAssetsDetails" xlink:type="simple" xlink:href="rop-20220331.xsd#GoodwillandOtherIntangibleAssetsOtherIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/GoodwillandOtherIntangibleAssetsOtherIntangibleAssetsDetails" xlink:type="extended" id="i5e1a0e5593e14e9183db960228ca32de_GoodwillandOtherIntangibleAssetsOtherIntangibleAssetsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_35e0ac26-b937-45dc-b4a6-e7d8bc742fbb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_f3f53e5f-ef19-4f71-abe4-0e3c49473ae9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_35e0ac26-b937-45dc-b4a6-e7d8bc742fbb" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_f3f53e5f-ef19-4f71-abe4-0e3c49473ae9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_6932267d-b38d-4690-98f0-05fc8e965722" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_35e0ac26-b937-45dc-b4a6-e7d8bc742fbb" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_6932267d-b38d-4690-98f0-05fc8e965722" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_74752b75-797b-445e-9f1c-5b63677cefe7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_35e0ac26-b937-45dc-b4a6-e7d8bc742fbb" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_74752b75-797b-445e-9f1c-5b63677cefe7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_efdfe4f3-49d7-41c9-bcae-ace416cae9b6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_35e0ac26-b937-45dc-b4a6-e7d8bc742fbb" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_efdfe4f3-49d7-41c9-bcae-ace416cae9b6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_c38aef98-80b8-4f8b-bddc-e2fd3adb0bd8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_35e0ac26-b937-45dc-b4a6-e7d8bc742fbb" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_c38aef98-80b8-4f8b-bddc-e2fd3adb0bd8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_c137676d-41dc-4165-b4a8-b28abb206801" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_35e0ac26-b937-45dc-b4a6-e7d8bc742fbb" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_c137676d-41dc-4165-b4a8-b28abb206801" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_2d1e06ca-ba2b-490c-9910-36c4ab8d9186" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_35e0ac26-b937-45dc-b4a6-e7d8bc742fbb" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_2d1e06ca-ba2b-490c-9910-36c4ab8d9186" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_916f6a6d-ba70-4a48-afea-921d237873c5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_2d1e06ca-ba2b-490c-9910-36c4ab8d9186" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_916f6a6d-ba70-4a48-afea-921d237873c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_916f6a6d-ba70-4a48-afea-921d237873c5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_916f6a6d-ba70-4a48-afea-921d237873c5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_916f6a6d-ba70-4a48-afea-921d237873c5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_423f867a-c391-4dfa-b7a4-4ed225aeda27" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_916f6a6d-ba70-4a48-afea-921d237873c5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_423f867a-c391-4dfa-b7a4-4ed225aeda27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_6a856302-d3d3-402b-8c45-02b9a6a3ad12" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_423f867a-c391-4dfa-b7a4-4ed225aeda27" xlink:to="loc_us-gaap_CustomerRelationshipsMember_6a856302-d3d3-402b-8c45-02b9a6a3ad12" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnpatentedTechnologyMember_4d7489d9-7e6b-4bbe-8018-0f5c746e9804" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_UnpatentedTechnologyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_423f867a-c391-4dfa-b7a4-4ed225aeda27" xlink:to="loc_us-gaap_UnpatentedTechnologyMember_4d7489d9-7e6b-4bbe-8018-0f5c746e9804" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_113b000a-4dfe-4833-a605-f7438ba8c5d5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ComputerSoftwareIntangibleAssetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_423f867a-c391-4dfa-b7a4-4ed225aeda27" xlink:to="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_113b000a-4dfe-4833-a605-f7438ba8c5d5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PatentsMember_f9b58884-6a2e-4171-8b03-2d93b17fe785" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PatentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_423f867a-c391-4dfa-b7a4-4ed225aeda27" xlink:to="loc_us-gaap_PatentsMember_f9b58884-6a2e-4171-8b03-2d93b17fe785" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_c2886a36-903c-494b-8396-0ab25acd1083" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_423f867a-c391-4dfa-b7a4-4ed225aeda27" xlink:to="loc_us-gaap_TradeNamesMember_c2886a36-903c-494b-8396-0ab25acd1083" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_0dbf8e81-d5e5-47c1-b10e-b776ab523122" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_2d1e06ca-ba2b-490c-9910-36c4ab8d9186" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_0dbf8e81-d5e5-47c1-b10e-b776ab523122" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_0dbf8e81-d5e5-47c1-b10e-b776ab523122_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_0dbf8e81-d5e5-47c1-b10e-b776ab523122" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_0dbf8e81-d5e5-47c1-b10e-b776ab523122_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_43dbdddb-a5b0-496f-843a-39df719789be" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_0dbf8e81-d5e5-47c1-b10e-b776ab523122" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_43dbdddb-a5b0-496f-843a-39df719789be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_63837e6e-7870-462e-82e0-23ea03e0eeb4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_43dbdddb-a5b0-496f-843a-39df719789be" xlink:to="loc_us-gaap_TradeNamesMember_63837e6e-7870-462e-82e0-23ea03e0eeb4" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/GoodwillandOtherIntangibleAssetsNarrativeDetails" xlink:type="simple" xlink:href="rop-20220331.xsd#GoodwillandOtherIntangibleAssetsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/GoodwillandOtherIntangibleAssetsNarrativeDetails" xlink:type="extended" id="i5b99ccf19045440fb9e3a5154228e2ea_GoodwillandOtherIntangibleAssetsNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_f35360ca-f59b-4196-b9d9-065cba57037d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_76118a7a-773b-48ca-9322-896ef2a8e92d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_f35360ca-f59b-4196-b9d9-065cba57037d" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_76118a7a-773b-48ca-9322-896ef2a8e92d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_16bd158a-775a-46af-85b2-cab974581188" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_f35360ca-f59b-4196-b9d9-065cba57037d" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_16bd158a-775a-46af-85b2-cab974581188" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_a377b705-530c-41d8-be94-8db0704f7eee" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_16bd158a-775a-46af-85b2-cab974581188" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_a377b705-530c-41d8-be94-8db0704f7eee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_a377b705-530c-41d8-be94-8db0704f7eee_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_a377b705-530c-41d8-be94-8db0704f7eee" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_a377b705-530c-41d8-be94-8db0704f7eee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_bb8b4a44-d72a-452a-9428-d304b88ac6d4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_a377b705-530c-41d8-be94-8db0704f7eee" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_bb8b4a44-d72a-452a-9428-d304b88ac6d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_34da56e3-7017-41ce-99de-f06cea5ae59d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_bb8b4a44-d72a-452a-9428-d304b88ac6d4" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_34da56e3-7017-41ce-99de-f06cea5ae59d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/FairValueofFinancialInstrumentsandDebtScheduleofFixedRateSeniorNotesFairValueDetails" xlink:type="simple" xlink:href="rop-20220331.xsd#FairValueofFinancialInstrumentsandDebtScheduleofFixedRateSeniorNotesFairValueDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/FairValueofFinancialInstrumentsandDebtScheduleofFixedRateSeniorNotesFairValueDetails" xlink:type="extended" id="i87adc9c5709041abb9b529cbfa17f290_FairValueofFinancialInstrumentsandDebtScheduleofFixedRateSeniorNotesFairValueDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_45b3e602-0fc6-4ce9-90e2-4ed9fac6d8b9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtPercentageBearingFixedInterestAmount_8508ac0f-1112-4047-af4b-dd02b98850f3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtPercentageBearingFixedInterestAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_45b3e602-0fc6-4ce9-90e2-4ed9fac6d8b9" xlink:to="loc_us-gaap_LongtermDebtPercentageBearingFixedInterestAmount_8508ac0f-1112-4047-af4b-dd02b98850f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_42836059-795f-49de-84e9-c0320e576e66" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_45b3e602-0fc6-4ce9-90e2-4ed9fac6d8b9" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_42836059-795f-49de-84e9-c0320e576e66" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_f0333125-d841-4460-9bfa-fdebf2dfeee4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_45b3e602-0fc6-4ce9-90e2-4ed9fac6d8b9" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_f0333125-d841-4460-9bfa-fdebf2dfeee4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_c1da9942-33a6-4570-ad5b-f98f9a0ccaac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_45b3e602-0fc6-4ce9-90e2-4ed9fac6d8b9" xlink:to="loc_us-gaap_LongTermDebtFairValue_c1da9942-33a6-4570-ad5b-f98f9a0ccaac" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b0125e66-1b6d-4a70-bd27-24081a3d8638" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_45b3e602-0fc6-4ce9-90e2-4ed9fac6d8b9" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b0125e66-1b6d-4a70-bd27-24081a3d8638" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_b25843ba-4a1b-423b-bc1f-f5eb67480c4e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b0125e66-1b6d-4a70-bd27-24081a3d8638" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_b25843ba-4a1b-423b-bc1f-f5eb67480c4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_b25843ba-4a1b-423b-bc1f-f5eb67480c4e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_b25843ba-4a1b-423b-bc1f-f5eb67480c4e" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_b25843ba-4a1b-423b-bc1f-f5eb67480c4e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_214909f5-2f5a-4c51-b329-ddfa8ef5b5f1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_b25843ba-4a1b-423b-bc1f-f5eb67480c4e" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_214909f5-2f5a-4c51-b329-ddfa8ef5b5f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_58808b4a-0a6b-4869-b38e-b4dbe6a84549" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_214909f5-2f5a-4c51-b329-ddfa8ef5b5f1" xlink:to="loc_us-gaap_SeniorNotesMember_58808b4a-0a6b-4869-b38e-b4dbe6a84549" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_908b2482-c60b-4199-ad30-f8dbf67a8887" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b0125e66-1b6d-4a70-bd27-24081a3d8638" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_908b2482-c60b-4199-ad30-f8dbf67a8887" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_908b2482-c60b-4199-ad30-f8dbf67a8887_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_908b2482-c60b-4199-ad30-f8dbf67a8887" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_908b2482-c60b-4199-ad30-f8dbf67a8887_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_6deaf5ed-aa2b-4c69-b770-d93b963a7058" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_908b2482-c60b-4199-ad30-f8dbf67a8887" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_6deaf5ed-aa2b-4c69-b770-d93b963a7058" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_10e02839-b9d6-4eae-a902-1b448cb194be" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_6deaf5ed-aa2b-4c69-b770-d93b963a7058" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_10e02839-b9d6-4eae-a902-1b448cb194be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_fed9ae03-1ccd-4de7-ad3d-20edd83cf7d9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b0125e66-1b6d-4a70-bd27-24081a3d8638" xlink:to="loc_us-gaap_DebtInstrumentAxis_fed9ae03-1ccd-4de7-ad3d-20edd83cf7d9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_fed9ae03-1ccd-4de7-ad3d-20edd83cf7d9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_fed9ae03-1ccd-4de7-ad3d-20edd83cf7d9" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_fed9ae03-1ccd-4de7-ad3d-20edd83cf7d9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_d3aec08e-9627-462b-9705-84fe7373b4e8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_fed9ae03-1ccd-4de7-ad3d-20edd83cf7d9" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_d3aec08e-9627-462b-9705-84fe7373b4e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SeniorNotesDue2022Member_dfc32ab0-9ad4-43f8-9c07-d581ecb59ea6" xlink:href="rop-20220331.xsd#rop_SeniorNotesDue2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_d3aec08e-9627-462b-9705-84fe7373b4e8" xlink:to="loc_rop_SeniorNotesDue2022Member_dfc32ab0-9ad4-43f8-9c07-d581ecb59ea6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SeniorUnsecuredNotesDueAugust152022Member_1008c200-7de4-4915-9d12-be6751761839" xlink:href="rop-20220331.xsd#rop_SeniorUnsecuredNotesDueAugust152022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_d3aec08e-9627-462b-9705-84fe7373b4e8" xlink:to="loc_rop_SeniorUnsecuredNotesDueAugust152022Member_1008c200-7de4-4915-9d12-be6751761839" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SeniorNotesDue2023Member_1bfe69e0-afe2-421c-b3c7-cb56af566073" xlink:href="rop-20220331.xsd#rop_SeniorNotesDue2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_d3aec08e-9627-462b-9705-84fe7373b4e8" xlink:to="loc_rop_SeniorNotesDue2023Member_1bfe69e0-afe2-421c-b3c7-cb56af566073" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SeniorNotesDuein2024Member_fa2af6cf-7544-4b8a-a5b1-fa0322a0df2b" xlink:href="rop-20220331.xsd#rop_SeniorNotesDuein2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_d3aec08e-9627-462b-9705-84fe7373b4e8" xlink:to="loc_rop_SeniorNotesDuein2024Member_fa2af6cf-7544-4b8a-a5b1-fa0322a0df2b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SeniorNotesDue2025Member_40f76992-514c-4249-87cd-0a1f727dcc6d" xlink:href="rop-20220331.xsd#rop_SeniorNotesDue2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_d3aec08e-9627-462b-9705-84fe7373b4e8" xlink:to="loc_rop_SeniorNotesDue2025Member_40f76992-514c-4249-87cd-0a1f727dcc6d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SeniorUnsecuredNotesDueSeptember152025Member_de8e7093-6b54-4dff-9263-e149bd46ee42" xlink:href="rop-20220331.xsd#rop_SeniorUnsecuredNotesDueSeptember152025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_d3aec08e-9627-462b-9705-84fe7373b4e8" xlink:to="loc_rop_SeniorUnsecuredNotesDueSeptember152025Member_de8e7093-6b54-4dff-9263-e149bd46ee42" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SeniorNotesDue2026Member_b3404a09-88fc-45c6-bacf-063d41e50708" xlink:href="rop-20220331.xsd#rop_SeniorNotesDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_d3aec08e-9627-462b-9705-84fe7373b4e8" xlink:to="loc_rop_SeniorNotesDue2026Member_b3404a09-88fc-45c6-bacf-063d41e50708" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SeniorUnsecuredNotesDueSeptember152027Member_4b509edd-c833-4afc-9ab9-eae01f852245" xlink:href="rop-20220331.xsd#rop_SeniorUnsecuredNotesDueSeptember152027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_d3aec08e-9627-462b-9705-84fe7373b4e8" xlink:to="loc_rop_SeniorUnsecuredNotesDueSeptember152027Member_4b509edd-c833-4afc-9ab9-eae01f852245" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SeniorNotesDue2028Member_42ae662d-7ba5-4ea7-be6a-eae886d93361" xlink:href="rop-20220331.xsd#rop_SeniorNotesDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_d3aec08e-9627-462b-9705-84fe7373b4e8" xlink:to="loc_rop_SeniorNotesDue2028Member_42ae662d-7ba5-4ea7-be6a-eae886d93361" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SeniorNotesDuein2029Member_2dcdc1a8-601f-40d4-ba82-6ef1a207d7ba" xlink:href="rop-20220331.xsd#rop_SeniorNotesDuein2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_d3aec08e-9627-462b-9705-84fe7373b4e8" xlink:to="loc_rop_SeniorNotesDuein2029Member_2dcdc1a8-601f-40d4-ba82-6ef1a207d7ba" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SeniorNotesDueJune2030Member_6bc92143-cec1-40db-908f-0c06ded8f448" xlink:href="rop-20220331.xsd#rop_SeniorNotesDueJune2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_d3aec08e-9627-462b-9705-84fe7373b4e8" xlink:to="loc_rop_SeniorNotesDueJune2030Member_6bc92143-cec1-40db-908f-0c06ded8f448" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SeniorUnsecuredNotesDueFebruary152031Member_1bf145f3-5c1b-41f1-a82c-a8f2541b3317" xlink:href="rop-20220331.xsd#rop_SeniorUnsecuredNotesDueFebruary152031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_d3aec08e-9627-462b-9705-84fe7373b4e8" xlink:to="loc_rop_SeniorUnsecuredNotesDueFebruary152031Member_1bf145f3-5c1b-41f1-a82c-a8f2541b3317" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/ContingenciesDetails" xlink:type="simple" xlink:href="rop-20220331.xsd#ContingenciesDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/ContingenciesDetails" xlink:type="extended" id="ie98e43b01e0248a2bf43bf9d8f31541e_ContingenciesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_3fa7868b-2cdc-4756-81d6-fea6941d6db4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyPendingClaimsNumber_51300af1-f64a-4be3-97b6-cb60e78d37e1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingencyPendingClaimsNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_3fa7868b-2cdc-4756-81d6-fea6941d6db4" xlink:to="loc_us-gaap_LossContingencyPendingClaimsNumber_51300af1-f64a-4be3-97b6-cb60e78d37e1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNumberOfPlaintiffs_f7cf6331-aa4a-4cdf-8be7-c63f7e6c3637" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingencyNumberOfPlaintiffs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_3fa7868b-2cdc-4756-81d6-fea6941d6db4" xlink:to="loc_us-gaap_LossContingencyNumberOfPlaintiffs_f7cf6331-aa4a-4cdf-8be7-c63f7e6c3637" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationSettlementExpense_19c72bb9-720a-497e-9560-defa522e4410" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LitigationSettlementExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_3fa7868b-2cdc-4756-81d6-fea6941d6db4" xlink:to="loc_us-gaap_LitigationSettlementExpense_19c72bb9-720a-497e-9560-defa522e4410" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_daa0b877-d748-46c9-9b40-2188f25321a6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_3fa7868b-2cdc-4756-81d6-fea6941d6db4" xlink:to="loc_us-gaap_LossContingenciesTable_daa0b877-d748-46c9-9b40-2188f25321a6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseAxis_041f1c1f-3044-4a7d-9edf-e808f61ff5e8" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_LitigationCaseAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_daa0b877-d748-46c9-9b40-2188f25321a6" xlink:to="loc_srt_LitigationCaseAxis_041f1c1f-3044-4a7d-9edf-e808f61ff5e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_041f1c1f-3044-4a7d-9edf-e808f61ff5e8_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_041f1c1f-3044-4a7d-9edf-e808f61ff5e8" xlink:to="loc_srt_LitigationCaseTypeDomain_041f1c1f-3044-4a7d-9edf-e808f61ff5e8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_0318829d-c58b-47c2-b29d-31cad80f6a05" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_041f1c1f-3044-4a7d-9edf-e808f61ff5e8" xlink:to="loc_srt_LitigationCaseTypeDomain_0318829d-c58b-47c2-b29d-31cad80f6a05" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_VertaforeLitigationMember_71ff562c-a3cc-43ff-b062-40eda320c047" xlink:href="rop-20220331.xsd#rop_VertaforeLitigationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_0318829d-c58b-47c2-b29d-31cad80f6a05" xlink:to="loc_rop_VertaforeLitigationMember_71ff562c-a3cc-43ff-b062-40eda320c047" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_AllenEtAlVVertaforeIncMember_9fa0f502-4cb4-4458-b8e7-c4ec3df7c94e" xlink:href="rop-20220331.xsd#rop_AllenEtAlVVertaforeIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rop_VertaforeLitigationMember_71ff562c-a3cc-43ff-b062-40eda320c047" xlink:to="loc_rop_AllenEtAlVVertaforeIncMember_9fa0f502-4cb4-4458-b8e7-c4ec3df7c94e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_MulveyEtAlVVertaforeIncMember_3216d337-3138-44b9-9970-06e0a5a3208d" xlink:href="rop-20220331.xsd#rop_MulveyEtAlVVertaforeIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rop_VertaforeLitigationMember_71ff562c-a3cc-43ff-b062-40eda320c047" xlink:to="loc_rop_MulveyEtAlVVertaforeIncMember_3216d337-3138-44b9-9970-06e0a5a3208d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_VerathonIncMember_7071d4b6-634a-47b5-950d-bdb30a697b7b" xlink:href="rop-20220331.xsd#rop_VerathonIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rop_VertaforeLitigationMember_71ff562c-a3cc-43ff-b062-40eda320c047" xlink:to="loc_rop_VerathonIncMember_7071d4b6-634a-47b5-950d-bdb30a697b7b" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/BusinessSegmentsDetails" xlink:type="simple" xlink:href="rop-20220331.xsd#BusinessSegmentsDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/BusinessSegmentsDetails" xlink:type="extended" id="i4e67ded15df841cf9d246d4725e7f039_BusinessSegmentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_3a97eb65-c055-4fcc-b04f-42c2877dd2d6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_2c4db039-5c9b-4ca5-bf44-4c3abd58435d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3a97eb65-c055-4fcc-b04f-42c2877dd2d6" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_2c4db039-5c9b-4ca5-bf44-4c3abd58435d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_IncreaseDecreaseInNetSalesPercentage_965a6785-ed03-46c3-8b01-187aa86fe7b1" xlink:href="rop-20220331.xsd#rop_IncreaseDecreaseInNetSalesPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3a97eb65-c055-4fcc-b04f-42c2877dd2d6" xlink:to="loc_rop_IncreaseDecreaseInNetSalesPercentage_965a6785-ed03-46c3-8b01-187aa86fe7b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_938d0218-7c27-48b7-b374-427502f0688d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3a97eb65-c055-4fcc-b04f-42c2877dd2d6" xlink:to="loc_us-gaap_GrossProfit_938d0218-7c27-48b7-b374-427502f0688d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_IncreaseDecreaseInGrossProfitPercentage_697556fe-d12c-44c9-91e6-8a204148d325" xlink:href="rop-20220331.xsd#rop_IncreaseDecreaseInGrossProfitPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3a97eb65-c055-4fcc-b04f-42c2877dd2d6" xlink:to="loc_rop_IncreaseDecreaseInGrossProfitPercentage_697556fe-d12c-44c9-91e6-8a204148d325" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SegmentOperatingProfit_d27dd3ac-c21d-4a3c-a71f-b5ff8fae67ff" xlink:href="rop-20220331.xsd#rop_SegmentOperatingProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3a97eb65-c055-4fcc-b04f-42c2877dd2d6" xlink:to="loc_rop_SegmentOperatingProfit_d27dd3ac-c21d-4a3c-a71f-b5ff8fae67ff" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_IncreaseDecreaseInOperatingProfitPercentage_2319712b-6d0b-48b3-b788-f029b92f037c" xlink:href="rop-20220331.xsd#rop_IncreaseDecreaseInOperatingProfitPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3a97eb65-c055-4fcc-b04f-42c2877dd2d6" xlink:to="loc_rop_IncreaseDecreaseInOperatingProfitPercentage_2319712b-6d0b-48b3-b788-f029b92f037c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncurrentAssets_cb42917c-3974-488e-a34b-f1eead01f980" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3a97eb65-c055-4fcc-b04f-42c2877dd2d6" xlink:to="loc_us-gaap_NoncurrentAssets_cb42917c-3974-488e-a34b-f1eead01f980" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_IncreaseDecreaseInLongLivedAssets_419d095b-640b-4feb-9de8-08b09331ef48" xlink:href="rop-20220331.xsd#rop_IncreaseDecreaseInLongLivedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3a97eb65-c055-4fcc-b04f-42c2877dd2d6" xlink:to="loc_rop_IncreaseDecreaseInLongLivedAssets_419d095b-640b-4feb-9de8-08b09331ef48" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_96b55f89-08f5-4ef5-a3e8-e35049ebe323" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3a97eb65-c055-4fcc-b04f-42c2877dd2d6" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_96b55f89-08f5-4ef5-a3e8-e35049ebe323" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_8501cfc7-f13e-4ec8-80b9-51fedaa1776f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3a97eb65-c055-4fcc-b04f-42c2877dd2d6" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_8501cfc7-f13e-4ec8-80b9-51fedaa1776f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_df27d20d-7711-4613-9077-1e8de9178830" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_8501cfc7-f13e-4ec8-80b9-51fedaa1776f" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_df27d20d-7711-4613-9077-1e8de9178830" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_df27d20d-7711-4613-9077-1e8de9178830_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_df27d20d-7711-4613-9077-1e8de9178830" xlink:to="loc_us-gaap_SegmentDomain_df27d20d-7711-4613-9077-1e8de9178830_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_a1800afa-5e76-4ef3-86d4-fbd6dfd8128c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_df27d20d-7711-4613-9077-1e8de9178830" xlink:to="loc_us-gaap_SegmentDomain_a1800afa-5e76-4ef3-86d4-fbd6dfd8128c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_ApplicationSoftwareSegmentMember_37e5b929-f085-4667-8ee4-b10f8b145089" xlink:href="rop-20220331.xsd#rop_ApplicationSoftwareSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a1800afa-5e76-4ef3-86d4-fbd6dfd8128c" xlink:to="loc_rop_ApplicationSoftwareSegmentMember_37e5b929-f085-4667-8ee4-b10f8b145089" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_NetworkSoftwareAndSystemsSegmentMember_595f8129-e9dd-4f41-ace5-178004baa17d" xlink:href="rop-20220331.xsd#rop_NetworkSoftwareAndSystemsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a1800afa-5e76-4ef3-86d4-fbd6dfd8128c" xlink:to="loc_rop_NetworkSoftwareAndSystemsSegmentMember_595f8129-e9dd-4f41-ace5-178004baa17d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_MeasurementAndAnalyticalSolutionsSegmentMember_a25d28c2-b3b5-48dc-82c6-3789ee58acfa" xlink:href="rop-20220331.xsd#rop_MeasurementAndAnalyticalSolutionsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a1800afa-5e76-4ef3-86d4-fbd6dfd8128c" xlink:to="loc_rop_MeasurementAndAnalyticalSolutionsSegmentMember_a25d28c2-b3b5-48dc-82c6-3789ee58acfa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_ProcessTechnologiesSegmentMember_ba2a6be7-3162-4ce4-80e8-16207f6a97da" xlink:href="rop-20220331.xsd#rop_ProcessTechnologiesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a1800afa-5e76-4ef3-86d4-fbd6dfd8128c" xlink:to="loc_rop_ProcessTechnologiesSegmentMember_ba2a6be7-3162-4ce4-80e8-16207f6a97da" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_8457b0cd-488d-4c6a-b5ec-845d7da4b2e1" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_8501cfc7-f13e-4ec8-80b9-51fedaa1776f" xlink:to="loc_srt_ConsolidationItemsAxis_8457b0cd-488d-4c6a-b5ec-845d7da4b2e1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_8457b0cd-488d-4c6a-b5ec-845d7da4b2e1_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_8457b0cd-488d-4c6a-b5ec-845d7da4b2e1" xlink:to="loc_srt_ConsolidationItemsDomain_8457b0cd-488d-4c6a-b5ec-845d7da4b2e1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_09d6e945-5beb-4124-bb4a-06a1ff41fed8" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_8457b0cd-488d-4c6a-b5ec-845d7da4b2e1" xlink:to="loc_srt_ConsolidationItemsDomain_09d6e945-5beb-4124-bb4a-06a1ff41fed8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_5aa4a191-df84-458f-8057-b9b99881de5f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_09d6e945-5beb-4124-bb4a-06a1ff41fed8" xlink:to="loc_us-gaap_CorporateNonSegmentMember_5aa4a191-df84-458f-8057-b9b99881de5f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/RevenuesfromContractsDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="rop-20220331.xsd#RevenuesfromContractsDisaggregationofRevenueDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/RevenuesfromContractsDisaggregationofRevenueDetails" xlink:type="extended" id="i7616801a978342e1a4114342900aaf73_RevenuesfromContractsDisaggregationofRevenueDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_2b469ff6-4c00-4561-8f03-079c9179c288" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_44ef8d42-5a67-42b1-b695-d4ea436bc6ac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_2b469ff6-4c00-4561-8f03-079c9179c288" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_44ef8d42-5a67-42b1-b695-d4ea436bc6ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_90f26c80-8d9f-4601-8a3f-42dcca45280c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_2b469ff6-4c00-4561-8f03-079c9179c288" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_90f26c80-8d9f-4601-8a3f-42dcca45280c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_0e140fad-0449-482c-a977-3a1e980a0e96" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_90f26c80-8d9f-4601-8a3f-42dcca45280c" xlink:to="loc_srt_ProductOrServiceAxis_0e140fad-0449-482c-a977-3a1e980a0e96" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_0e140fad-0449-482c-a977-3a1e980a0e96_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_0e140fad-0449-482c-a977-3a1e980a0e96" xlink:to="loc_srt_ProductsAndServicesDomain_0e140fad-0449-482c-a977-3a1e980a0e96_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_d5808c3b-fc3f-46a7-b684-3f10ceee07bd" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_0e140fad-0449-482c-a977-3a1e980a0e96" xlink:to="loc_srt_ProductsAndServicesDomain_d5808c3b-fc3f-46a7-b684-3f10ceee07bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_SoftwareAndRelatedServicesMember_68924211-7b85-4d57-ab1b-461067de2efd" xlink:href="rop-20220331.xsd#rop_SoftwareAndRelatedServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_d5808c3b-fc3f-46a7-b684-3f10ceee07bd" xlink:to="loc_rop_SoftwareAndRelatedServicesMember_68924211-7b85-4d57-ab1b-461067de2efd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rop_EngineeredProductsAndRelatedServicesMember_a03e34ea-6b48-459e-b514-a39332617854" xlink:href="rop-20220331.xsd#rop_EngineeredProductsAndRelatedServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_d5808c3b-fc3f-46a7-b684-3f10ceee07bd" xlink:to="loc_rop_EngineeredProductsAndRelatedServicesMember_a03e34ea-6b48-459e-b514-a39332617854" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/RevenuesfromContractsRemainingPerformanceObligationsNarrativeDetails" xlink:type="simple" xlink:href="rop-20220331.xsd#RevenuesfromContractsRemainingPerformanceObligationsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/RevenuesfromContractsRemainingPerformanceObligationsNarrativeDetails" xlink:type="extended" id="i6cfb06cf92394d75b2361d7006314dfd_RevenuesfromContractsRemainingPerformanceObligationsNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_2081ad3c-8c31-4893-9d7b-3f7f9be74b15" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_d1b8772a-a33a-4e52-9d01-13d37541c7e3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_2081ad3c-8c31-4893-9d7b-3f7f9be74b15" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_d1b8772a-a33a-4e52-9d01-13d37541c7e3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_41f7a902-c4cd-427b-9f3e-d632cd7d79b5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_2081ad3c-8c31-4893-9d7b-3f7f9be74b15" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_41f7a902-c4cd-427b-9f3e-d632cd7d79b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_d4a7edc1-a7a9-4180-92e4-81ca5358d502" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_2081ad3c-8c31-4893-9d7b-3f7f9be74b15" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_d4a7edc1-a7a9-4180-92e4-81ca5358d502" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_11f9445d-1f4a-4fdd-ad61-b770c28233b7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_2081ad3c-8c31-4893-9d7b-3f7f9be74b15" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_11f9445d-1f4a-4fdd-ad61-b770c28233b7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_5bb4fed5-7ca4-443e-894b-5e27a883de3f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_11f9445d-1f4a-4fdd-ad61-b770c28233b7" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_5bb4fed5-7ca4-443e-894b-5e27a883de3f" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://ropertech.com/role/RevenuesfromContractsRemainingPerformanceObligationsNarrativeDetails_1" xlink:type="simple" xlink:href="rop-20220331.xsd#RevenuesfromContractsRemainingPerformanceObligationsNarrativeDetails_1"/>
  <link:definitionLink xlink:role="http://ropertech.com/role/RevenuesfromContractsRemainingPerformanceObligationsNarrativeDetails_1" xlink:type="extended" id="id8ab949489624fe3ac1ce78fa15d89c7_RevenuesfromContractsRemainingPerformanceObligationsNarrativeDetails_1">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_2081ad3c-8c31-4893-9d7b-3f7f9be74b15" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_d1b8772a-a33a-4e52-9d01-13d37541c7e3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_2081ad3c-8c31-4893-9d7b-3f7f9be74b15" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_d1b8772a-a33a-4e52-9d01-13d37541c7e3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_41f7a902-c4cd-427b-9f3e-d632cd7d79b5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_2081ad3c-8c31-4893-9d7b-3f7f9be74b15" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_41f7a902-c4cd-427b-9f3e-d632cd7d79b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_d4a7edc1-a7a9-4180-92e4-81ca5358d502" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_2081ad3c-8c31-4893-9d7b-3f7f9be74b15" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_d4a7edc1-a7a9-4180-92e4-81ca5358d502" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_11f9445d-1f4a-4fdd-ad61-b770c28233b7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_2081ad3c-8c31-4893-9d7b-3f7f9be74b15" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_11f9445d-1f4a-4fdd-ad61-b770c28233b7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
  </link:definitionLink>
</link:linkbase>
