<p><strong>Noun:</strong></p><ul><li>(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.</li><li>A long, pointed, or protruding tooth.</li><li>A projection resembling the tusk of an animal.</li><li>Also called gain.</li><li>Carpentry: A diagonally cut shoulder at the end of a timber for strengthening a tenon.</li></ul><p><strong>Verb (used with object):</strong></p><ul><li>To dig up or tear off with the tusks.</li><li>To gore with a tusk.</li></ul><p><strong>Verb (used without object):</strong></p><ul><li>To dig up or thrust at the ground with the tusks.</li></ul>