Definition of tusk

• n. - Same as Torsk.
• n. - One of the elongated incisor or canine teeth of the wild boar, elephant, etc.; hence, any long, protruding tooth.
• n. - A toothshell, or Dentalium; -- called also tusk-shell.
• n. - A projecting member like a tenon, and serving the same or a similar purpose, but composed of several steps, or offsets. Thus, in the illustration, a is the tusk, and each of the several parts, or offsets, is called a tooth.
• v. i. - To bare or gnash the teeth.