muzzle, muzzler (noun); muzzled, muzzling, muzzles (verbs) 1. The projecting part of an animal's face, made up of its nose and jaws. 2. A device that is strapped over the nose and jaws of an animal to prevent it from opening its mouth, e.g. to bite, bark, or eat. 3. The front open end of the barrel of a firearm. 4. Something that is meant to pre... Found on http://www.wordinfo.info/words/index/info/view_unit/2857/