Definition of "coal"
noun:
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A black rock formed from prehistoric plant remains, composed largely of carbon and burned as a fuel.
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A piece of coal used for burning. Note that in British English the first of the following examples would usually be used, whereas in American English the latter would.
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A type of coal, such as bituminous, anthracite, or lignite, and grades and varieties thereof.
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A smouldering piece of material.
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verb:
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To take on a supply of coal (usually of steam ships).
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To be converted to charcoal.
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