- The part of a musical or other instrument to which the
mouth is applied in using it; as, the mouthpiece of a bugle, or of a
tobacco pipe. - An appendage to an inlet or outlet opening of a pipe or
vessel, to direct or facilitate the inflow or outflow of a fluid. - One who delivers the opinion of others or of another; a
spokesman; as, the mouthpiece of his party.
Meaning of 'mouthpiece' (Princeton's WordNet)
1 . mouthpiece
[ n]
Meaning (1): - a part that goes over or into the mouth of a person