a person or thing that loses or has lost something, especially a game or contest:he was the loser in last year’s race for governor
[with adjective] a person who accepts defeat with good or bad grace:they should concede that we won and be good losers
a person who is disadvantaged by a particular situation or course of action:children are the losers when politicians keep fiddling around with education
informal a person who fails frequently or is generally unsuccessful in life:a ragtag community of rejects and losers
Bridge a card that is expected to be part of a losing trick:South appeared to have three losers: a trump, a diamond, and a spade
be on (or on to) a loser
informal be involved in a course of action that is bound to fail:you’re on to a loser if you try and tell them what to do