Meaning of 'Canary in a coal mine'
What does the saying 'Canary in a coal mine' mean?
Idiom: Canary in a coal mine
Meaning:
A canary in a coal mine is an early warning of danger.
Country: British English 
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Subject Area: Animals |
Usage Type: Both or All Words Used
All idioms have been editorially reviewed. Submitted idioms may have been edited for correctness and completeness.
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