the mouth and nose of an animal, especially a dog

The dog is white with a black muzzle and ears.

He rubbed the muzzle of a horse when it nosed up to him.

the end of a gun barrel, where the bullets come out

Always point the muzzle in a safe direction.

He could feel the pressure of the gun muzzle behind his right ear.

to put a muzzle on an animal

Dangerous dogs should be muzzled. 凶猛的狗应该套上口套。

to stop a person or organization from expressing independent opinions

The new Secrecy Act will muzzle the media and the opposition. 新的保密法将会压制媒体及反对派的声音。