/ Dictionary / Index A America Firster: Meaning and Definition of Find definitions for: Amer'ica First'er Pronunciation: (fûr'stur), [key] — Informal. Informal. a member or supporter of the America First Committee. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. America First Committee American Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language