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English definition of “adultery”

adultery

noun [U]     /əˈdʌl.tər.i/ US  /-t̬ɚ.i/
sex between a married man or woman and someone he or she is not married to: Many people in public life have committed adultery.Infidelity in relationships adulterous     /əˈdʌl.tər.əs/ US  /-t̬ɚ-/ adjective He had an adulterous relationship with his wife's best friend.Disloyalty, betrayal and treasonInfidelity in relationships
(Definition of adultery noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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