coal
other fuels FUEL, ELECTRICITY, GAS, OIL - a hard, black substance, usually dug from under the ground, which is used as a fuel: coal (noun U) a bag of coal ◎ a lump of coal (= one piece of coal) a coal fire - a place where coal is dug from the ground: mine, coal mine - a large area which has a lot of coal under the ground: coalfield - a man who works in a mine: miner - to use coal in a fire: burn sth Does your boiler burn oil or coal?
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