Definition of coal-miner:
(n) :
(uncountable) A black or brownish black rock formed from prehistoric plant remains, composed largely of carbon and burned as a fuel.
(n) :
(countable) A type of coal, such as bituminous, anthracite, or lignite, and grades and varieties thereof, as a fuel commodity ready to buy and burn.
(n) :
(countable) A piece of coal used for burning (this use is less common in American English)
(n) :
(countable) A glowing or charred piece of coal, wood, or other solid fuel.
(n) :
Charcoal.
(v) :
(transitive) To supply with coal.