- coal [ koul ] noun ***uncount a hard black substance that is dug from the ground and burned as fuel to provide heat:Put some more coal on the fire.coal dusta piece/lump of coala. uncount used for talking about the industry of digging coal out of the ground:Is there a future for coal?the coal industryb. count a piece of coal, especially when it is burning:Nina stirred the coals with the poker.rake/haul someone over the coalsto speak angrily to someone because they have done something wrong
Usage of the words and phrases in modern English. 2013.