/ Dictionary / Index A adulterous: Meaning and Definition of Find definitions for: a•dul•ter•ous Pronunciation: (u-dul'tur-us), [key] — adj. characterized by or involved in adultery; illicit: an adulterous relationship. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: adulterous (Thesaurus) adulterine adultery Related Content Daily Word Quiz: ontiguous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language