From Longman Dictionary of Contemporary Englishcommit adulterycommit adulteryif a married person commits adultery, they have sex with someone who is not their husband or wife → commit
Examples from the Corpus
commit adultery• A Inc., has been Baccused of mishandling church funds and committing adultery.• Men or women convicted of drinking alcohol or committing adultery may be lashed in public 100 times.• Had the woman committed adultery or not? they wondered.• Sexy young blond women, both committing adultery, turn up as victims early on.• One obvious example is the almost universal ban against committing adultery with another man s wife.• Smith admits he did wrong by committing adultery with the wife of a Marine sergeant, while the enlisted man was overseas.• He'd committed adultery with the wife of the local steward - the land agent for the lord of the manor. 