Read the dictionary definition of muzzle. All definitions for this word.
1. forward projecting part of the head of certain animals; includes the jaws and nose
2. restraint put into a person's mouth to prevent speaking or shouting
3. the open circular discharging end of a gun
4. 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
5. tie a gag around someone's mouth in order to silence them
1. The burglars gagged the home owner and tied him to a chair
6. prevent from speaking out
1. The press was gagged
7. fit with a muzzle
1. muzzle the dog to prevent it from biting strangers