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zero-sum

[zeer-oh-suhm] /ˈzɪər oʊˌsʌm/
adjective
1.
of or denoting a system in which the sum of the gains equals the sum of the losses:
a zero-sum economy.
Origin
1955-1960
1955-60
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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