/ Dictionary / Index A Antifederal party: Meaning and Definition of Find definitions for: An•ti•fed'er•al par"ty Pronunciation: (an"tē-fed'ur-ul, -fed'rul, an"tī-), [key] — U.S. Hist. U.S. Hist. the party that, before 1789, opposed the adoption of the proposed Constitution and after that favored its strict construction. Cf. States' rights. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Antifederalist antifeedant 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