/ Dictionary / Index O opponent: Meaning and Definition of Find definitions for: op•po•nent Pronunciation: (u-pō'nunt), [key] — n. a person who is on an opposing side in a game, contest, controversy, or the like; adversary. —adj. being opposite, as in position. opposing; adverse; antagonistic. bringing parts together or into opposition, as a muscle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: opponent (Thesaurus) opponency opportune 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