adulterous

Definitions of adulterous
  1. adjective
    characterized by adultery
    “an adulterous relationship”
    synonyms: extracurricular, extramarital
    illicit
    contrary to accepted morality (especially sexual morality) or convention
  2. adjective
    not faithful to a spouse or lover
    adulterous husbands and wives”
    synonyms: cheating, two-timing
    unfaithful
    having sexual relations with someone other than your husband or wife, or your boyfriend or girlfriend
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