Simple Definition of loser
: someone or something that loses a game, contest, etc.
: someone who is harmed or put in a worse position as the result of something
: a person who is not successful, attractive, etc.
Full Definition of loser
1 : a person or thing that loses especially consistently
2 : a person who is incompetent or unable to succeed; also : something doomed to fail or disappoint
Examples of loser in a sentence
The team had a reputation for being a loser year after year.
The loser of the bet has to buy drinks for the winner.
Whoever benefits from the new government programs, the real loser will be the American taxpayer.
That guy is a born loser.
First Known Use of loser
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