/ Dictionary / Index A Antifederalist: Meaning and Definition of Find definitions for: An•ti•fed•er•al•ist Pronunciation: (an"tē-fed'ur-u-list, -fed'ru-, an"tī-), [key] — n. a member or supporter of the Antifederal party. (l.c.) an opponent of federalism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. antifebrin Antifederal party Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language