/ Dictionary / Index A adversary: Meaning and Definition of Find definitions for: ad•ver•sar•y Pronunciation: (ad'vur-ser"ē), [key] — n., pl. adj. -sar•ies, —n. a person, group, or force that opposes or attacks; opponent; enemy; foe. a person, group, etc., that is an opponent in a contest; contestant. the devil; Satan. —adj. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: adversary (Thesaurus) ad verbum* adversaryism Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language