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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019f8650-1343-74dc-b135-1853b4129263,g:cc2bb5b1-ab7c-4c67-b18c-f7c8ebf164c4-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.allegion.com/role/CoverPage" xlink:type="simple" xlink:href="alle-20260723.xsd#CoverPage"/>
  <link:definitionLink xlink:role="http://www.allegion.com/role/CoverPage" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_019f8650-1343-7091-ad6a-34eac28161ea" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_EntitiesTable_019f8650-1343-7091-ad6a-34eac28161ea" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019f8650-1343-7dbe-b569-5ca695e6d85a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_019f8650-1343-7091-ad6a-34eac28161ea" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019f8650-1343-7dbe-b569-5ca695e6d85a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019f8650-1343-7dbe-b569-5ca695e6d85a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019f8650-1343-7dbe-b569-5ca695e6d85a" xlink:to="loc_us-gaap_ClassOfStockDomain_019f8650-1343-7dbe-b569-5ca695e6d85a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019f8650-1343-750c-a321-8d74afb3e212" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019f8650-1343-7dbe-b569-5ca695e6d85a" xlink:to="loc_us-gaap_ClassOfStockDomain_019f8650-1343-750c-a321-8d74afb3e212" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019f8650-1343-7bf7-a3bb-77dfad4a9423" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019f8650-1343-750c-a321-8d74afb3e212" xlink:to="loc_us-gaap_CommonStockMember_019f8650-1343-7bf7-a3bb-77dfad4a9423" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_alle_ThreePointFivePercentSeniorNotesDue2029Member_019f8650-1343-78c3-a9f1-d0f678309d9a" xlink:href="alle-20260723.xsd#alle_ThreePointFivePercentSeniorNotesDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019f8650-1343-750c-a321-8d74afb3e212" xlink:to="loc_alle_ThreePointFivePercentSeniorNotesDue2029Member_019f8650-1343-78c3-a9f1-d0f678309d9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019f8650-1343-752d-8878-168d4605b9d5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_EntityRegistrantName_019f8650-1343-752d-8878-168d4605b9d5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019f8650-1343-775c-bcbe-a9a4288c26b7" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_DocumentType_019f8650-1343-775c-bcbe-a9a4288c26b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019f8650-1343-7dff-a221-1f8e611bae06" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_DocumentPeriodEndDate_019f8650-1343-7dff-a221-1f8e611bae06" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019f8650-1343-78d5-94cf-434eab9956d0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019f8650-1343-78d5-94cf-434eab9956d0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019f8650-1343-7ee8-bbe5-8a19012ffa2d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_EntityFileNumber_019f8650-1343-7ee8-bbe5-8a19012ffa2d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019f8650-1343-7888-aa70-1261cd764aca" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_EntityTaxIdentificationNumber_019f8650-1343-7888-aa70-1261cd764aca" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019f8650-1343-7746-8b85-49b7f30782ad" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_EntityCentralIndexKey_019f8650-1343-7746-8b85-49b7f30782ad" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019f8650-1343-7d67-8170-f8afc6c7caff" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_EntityAddressAddressLine1_019f8650-1343-7d67-8170-f8afc6c7caff" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_019f8650-1343-7db9-bf74-20468cc0aab8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_EntityAddressAddressLine2_019f8650-1343-7db9-bf74-20468cc0aab8" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine3_019f8650-1343-730a-8729-f4d3849710ca" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine3"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_EntityAddressAddressLine3_019f8650-1343-730a-8729-f4d3849710ca" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019f8650-1343-710b-88a4-bd6024d290db" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_EntityAddressCityOrTown_019f8650-1343-710b-88a4-bd6024d290db" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019f8650-1343-7841-876e-f086ea16087b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_EntityAddressPostalZipCode_019f8650-1343-7841-876e-f086ea16087b" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCountry_019f8650-1343-7d7f-ade2-21a645f1145e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCountry"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_EntityAddressCountry_019f8650-1343-7d7f-ade2-21a645f1145e" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CountryRegion_019f8650-1343-73b9-96c6-6a826b1944fb" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CountryRegion"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_CountryRegion_019f8650-1343-73b9-96c6-6a826b1944fb" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019f8650-1343-7ff4-8fe0-5166ec79b212" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_CityAreaCode_019f8650-1343-7ff4-8fe0-5166ec79b212" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019f8650-1343-7b55-a18b-f3b83eab991f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_LocalPhoneNumber_019f8650-1343-7b55-a18b-f3b83eab991f" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_019f8650-1343-7d71-9f0d-b8a450b64f51" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_WrittenCommunications"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_WrittenCommunications_019f8650-1343-7d71-9f0d-b8a450b64f51" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_019f8650-1343-725c-a659-a4736f449f03" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SolicitingMaterial"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_SolicitingMaterial_019f8650-1343-725c-a659-a4736f449f03" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_019f8650-1343-7c18-9cd1-4e799ead82f7" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_PreCommencementTenderOffer_019f8650-1343-7c18-9cd1-4e799ead82f7" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_019f8650-1343-7f1e-8048-1e4566951c62" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_019f8650-1343-7f1e-8048-1e4566951c62" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019f8650-1343-73d4-a6c3-de3f46d8ea38" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_Security12bTitle_019f8650-1343-73d4-a6c3-de3f46d8ea38" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019f8650-1343-7a1e-a684-ebc76612fc33" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_TradingSymbol_019f8650-1343-7a1e-a684-ebc76612fc33" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019f8650-1343-76c9-9bd4-8156c1e96a63" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_SecurityExchangeName_019f8650-1343-76c9-9bd4-8156c1e96a63" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019f8650-1343-7de1-a41b-426cff5a102f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_EntityEmergingGrowthCompany_019f8650-1343-7de1-a41b-426cff5a102f" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019f8650-1343-76a4-b62a-e23441381269" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019f8650-1343-77b9-bb1d-aaf8737a7da8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019f8650-1343-77ff-ba11-26521dfce55c" xlink:to="loc_dei_AmendmentFlag_019f8650-1343-77b9-bb1d-aaf8737a7da8" xlink:type="arc" order="25"/>
  </link:definitionLink>
</link:linkbase>
