charcoal (Adjective) — Of a very dark grey.
charcoal (Noun) — A carbonaceous material obtained by heating wood or other organic matter in the absence of air.
charcoal (Noun) — A stick of black carbon material used for drawing.
charcoal (Noun) — A very dark grey colour.
charcoal (Noun) — A drawing made with a stick of black carbon material.
charcoal (Verb) — (art) draw, trace, or represent with charcoal.