/ Dictionary / Index Z zero-sum game: Meaning and Definition of Find definitions for: ze'ro-sum game' Pronunciation: [key] — Math. Math. a game in which the sum of the winnings and losses of the various players is always zero, the losses being counted negatively. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. zero-sum zeroth Related Content Daily Word Quiz: exemplary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language