Meaning of “infidelity” in the English Dictionary

british dictionary

"infidelity" in British English

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infidelitynoun [ C or U ]

uk /ˌɪn.fɪˈdel.ə.ti/ us /ˌɪn.fəˈdel.ə.t̬i/

(Definition of “infidelity” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"infidelity" in American English

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infidelitynoun [ C/U ]

us /ˌɪn·fəˈdel·ɪ·t̬i/

the act of having sex with someone who is not your husband or wife

(Definition of “infidelity” from the Cambridge Academic Content Dictionary © Cambridge University Press)