Definition of "Muzzle" :

noun: forward projecting part of the head of certain animals; includes the jaws and nose

noun: restraint put into a person's mouth to prevent speaking or shouting

noun: the open circular discharging end of a gun

noun: a leather or wire restraint that fits over an animal's snout (especially a dog's nose and jaws) and prevents it from eating or biting

verb: tie a gag around someone's mouth in order to silence them

verb: prevent from speaking out

verb: fit with a muzzle

"Muzzle the dog to prevent it from biting strangers."