American English

Definition of infidelity noun from the Oxford Advanced American Dictionary

 

infidelity

 noun
noun
NAmE//ˌɪnfəˈdɛlət̮i//
 
(pl. infidelities) [uncountable, countable]
 
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the act of not being faithful to your wife, husband, or partner, by having sex with someone else marital infidelity She could not forgive his infidelities. opposite fidelity
See the Oxford Advanced Learner's Dictionary entry: infidelity