/ Dictionary / Index O oppositionist: Meaning and Definition of Find definitions for: op•po•si•tion•ist Pronunciation: (op"u-zish'u-nist), [key] — n. a person who offers opposition; a member of an opposition. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. opposition oppress Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language