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