Definition of "coal-mine" []

• A mine or pit from which coal is obtained. (noun)

The Century Dictionary (Public Domain)

• "Not only is the very word "poor" despised, but the broader political order ignores the desperate, ominous message these coal-mine canaries are sending us."
• "Indika last month said it plans to sell up to a 30% stake in PT Petrosea, its coal-mine construction and logistics arm."
• "I have residual doubts about the validity of a movement exemplified by Jim Crow, Nazis, and coal-mine operators."