Definition of zero sum in English English dictionary
of or pertaining to a situation or a system wherein gain is offset by an equal loss; of or pertaining to a situation whereing the gain (or loss) of a participant is balanced in an accurate manner by the losses or gains of the other participant or participants
Denoting a game or situation in which whatever is gained by one side is lost by the other
If you refer to a situation as a zero-sum game, you mean that if one person gains an advantage from it, someone else involved must suffer an equivalent disadvantage. They believe they're playing a zero-sum game, where both must compete for the same paltry resources. A situation in which a gain by one person or side must be matched by a loss by another person or side: "It's not a zero-sum game in which either youth or pensioners must lose" (Earl W. Foell). a situation in which you receive as much money or advantages as you give away