/ Dictionary / Index A arms race: Meaning and Definition of Find definitions for: arms' race" Pronunciation: [key] competition between countries to achieve superiority in quantity and quality of military arms. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. arm's-length armstand dive Related Content Daily Word Quiz: lyre Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language