Pronunciation: (tusk),[key] —n. 1. (in certain animals) a tooth developed to great length, usually one of a pair, as in the elephant, walrus, and wild boar, but singly in the narwhal.
2. a long, pointed, or protruding tooth.
3. a projection resembling the tusk of an animal.
4. Also called gain.Carpentry.a diagonally cut shoulder at the end of a timber for strengthening a tenon.
—v.t. 1. to dig up or tear off with the tusks.
2. to gore with a tusk.
—v.i. to dig up or thrust at the ground with the tusks.