a hard, black substance similar to coal that can be used as fuel or, in the form of sticks, as something to draw with木炭;炭笔
charcoal for the barbecue烧烤用的木炭
I prefer sketching in charcoal to pencil.比起铅笔来,我更愿用炭笔画素描。
a charcoal drawing炭笔画
The uniform is charcoal (grey) (= dark grey) and red.制服是深灰色配红色的。