1. (n.) The projecting mouth and nose of a quadruped, as of a horse; a snout.
2. (n.) The mouth of a thing; the end for entrance or discharge; as, the muzzle of a gun.
3. (n.) A fastening or covering (as a band or cage) for the mouth of an animal, to prevent eating or vicious biting.
4. (v. t.) To bind the mouth of; to fasten the mouth of, so as to prevent biting or eating; hence, figuratively, to bind; to sheathe; to restrain from speech or action.