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coal
/kɔʊl/
noun
A black rock formed from prehistoric plant remains, composed largely of carbon and burned as a fuel.
"Put some coal on the fire."
A piece of coal used for burning (this use is less common in American English)
"Put some coals on the fire."
A type of coal, such as bituminous, anthracite, or lignite, and grades and varieties thereof.
verb
To take on a supply of coal (usually of steam ships).
To supply with coal.
"to coal a steamer"
To be converted to charcoal.
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