Meaning of Antifederalist

An•ti•fed•er•al•ist

Pronunciation: (an"tē-fed'ur-u-list, -fed'ru-, an"tī-), [key]
— n.
  1. a member or supporter of the Antifederal party.
  2. (l.c.) an opponent of federalism.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.