from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of or relating to a situation in which a gain is offset by an equal loss: ". . .under the zero-sum budgeting system that governs federal spending, the money for spinal research is likely to be deducted from some other research account” ( Daniel S. Greenburg).
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of any system where all gains are offset by exactly equal losses.
Sorry, no etymologies found.