Meaning of “muzzle” - Learner’s Dictionary

muzzle

verb [ T ] uk us /ˈmʌzl/
PREVENT BITE

to put a muzzle on a dog:

Dangerous dogs must be muzzled in public places.
PREVENT OPINION

to prevent someone expressing their own opinions

(Definition of “muzzle verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)