RhymeZone: mouthpiece definitions

Definitions of mouthpiece:

noun: the aperture of a wind instrument into which the player blows directly
noun: the tube of a pipe or cigarette holder that a smoker holds in the mouth
noun: an acoustic device; the part of a telephone into which a person speaks
noun: (especially boxing) equipment that protects an athlete's mouth
noun: a part that goes over or into the mouth of a person
Example: "The mouthpiece of a respirator"
noun: a spokesperson (as a lawyer)