'adulterous' definitions:

Definition of 'adulterous'

From: WordNet
adjective
Characterized by adultery; "an adulterous relationship"; "extramarital affairs"; "the extracurricular activities of a philandering husband" [syn: adulterous, extramarital, extracurricular]
adjective
Not faithful to a spouse or lover; "adulterous husbands and wives"; "a two-timing boyfriend" [syn: adulterous, cheating(a), two-timing(a)]