Mouthpiece /(?)/

Mouth·piece

Mouthpiece

n.
  1. 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.
  2. An appendage to an inlet or outlet opening of a pipe or vessel, to direct or facilitate the inflow or outflow of a fluid.
  3. One who delivers the opinion of others or of another; a spokesman; as, the mouthpiece of his party.
    Egmont was imprudent enough to make himself the mouthpiece of their remonstrance.
  4. A person's lawyer. [slang]