/ Dictionary / Index Z zero-sum: Meaning and Definition of Find definitions for: ze•ro-sum Pronunciation: (zēr'ō-sum"), [key] — adj. of or denoting a system in which the sum of the gains equals the sum of the losses: a zero-sum economy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. zero population growth zero-sum game Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language