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Meaning of miners' canary | Babel Free

Noun CEFR B2

Definitions

A caged bird kept caged in mines because its demise provided a warning of dangerous levels of toxic gases.
Any thing, especially an organism, whose demise or distress provides an early warning of danger.
idiomatic

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

miners' moss miners' safety candlestick Minerva minerval Minervini minery