"canaries" in the noun sense
1. fink, snitch, snitcher, stoolpigeon, stool pigeon, stoolie, sneak, sneaker, canary
someone acting as an informer or decoy for the police
a female singer
3. canary yellow, canary
a moderate yellow with a greenish tinge
4. canary, canary bird
any of several small Old World finches
Source: WordNet® (An amazing lexical database of English)
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