(in a race) a contestant who fails to win or to place among the first three finishers.
an athlete or team whose performance in competition is rarely, if ever, a winning or near-winning one.
a person who loses a contest, election, or other competition.
a person who attains little or no success:
For every great artist there are a thousand also-rans.
a contestant, horse, etc, failing to finish among the first three in a race
an unsuccessful person; loser or nonentity
Collins English Dictionary - Complete & Unabridged 10th Edition
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