Top Definition
The 16th and final track from NIN's Year Zero album.
Zero-Sum is 6 minutes and 14 seconds long
by Xtreme2252 August 13, 2009
Zero-sum is the opposite of win win. If part of the people gain something the other part loses.
Washington D. C. is a zero-sum place.
by bootswalker March 20, 2009

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