Canary in a coal mine Meaning in English
expression
Definition
A 'canary in a coal mine' is someone or something that acts as an early warning of danger or problems, often before others notice them.
Usage & Nuances
This is an idiomatic, somewhat metaphorical expression based on miners using canaries to detect poisonous gases. Used mostly in formal or journalistic writing to describe warning signs or early indicators, not for literal birds or mines. Commonly used as 'serve as a canary in a coal mine' or 'act as the canary in a coal mine.'
Example Sentences
The first signs of disease were the canary in a coal mine for the doctors.
basic
Falling fish populations can be a canary in a coal mine for pollution.
basic
The slow sales acted as a canary in a coal mine for the new product.
basic
Young people leaving town is the canary in a coal mine for the local economy.
natural
Social media complaints acted as a canary in a coal mine for the company's PR team.
natural
Rising temperatures in the region are the canary in a coal mine for climate change.
natural