• The part of an object which comes near or in contact with one's mouth during use
  • Mouthpiece (smoking pipe)
  • Mouthpiece (telephone
    Telephone
    The telephone , colloquially referred to as a phone, is a telecommunications device that transmits and receives sounds, usually the human voice. Telephones are a point-to-point communication system whose most basic function is to allow two people separated by large distances to talk to each other...
    
     handset)
  • Mouthpiece (woodwind)
    Mouthpiece (woodwind)
    The mouthpiece of a woodwind instrument is that part of the instrument which is placed partly in the player's mouth. Single-reed instruments, capped double-reed instruments, and fipple flutes have mouthpieces while exposed double-reed instruments and open flutes do not.-Single-reed instruments:On...
    
    , a component of a woodwind instrument
  • Mouthpiece (brass)
    Mouthpiece (brass)
    On brass instruments the mouthpiece is the part of the instrument which is placed upon the player's lips. The purpose of the mouthpiece is a resonator, which passes vibration from the lips to the column of air contained within the instrument, giving rise to the standing wave pattern of vibration in...
    
    , a component of a brass instrument
  • Mouthpiece (scuba)
    Mouthpiece (scuba)
    In breathing sets, a mouthpiece is a part that the user grips in his mouth, to make a watertight seal between the breathing set and his mouth. It is composed of a short flattened-oval tube that goes in between the lips, with on its free end a flange that fits between the lips and the tooth and gums...
    
    , a component of a scuba diving or industrial breathing set
  • Mouthguard
    Mouthguard
    A mouthguard is a protective device for the mouth that covers the teeth and gums to prevent and reduce injury to the teeth, arches, lips and gums...
    
    , a device protecting the teeth from injury, also known as mouth piece

Other

• Mouthpiece (band)
  Mouthpiece (band)
  Mouthpiece was a New Jersey straight edge hardcore punk band from 1991 to 1996. Often seen as one of the last bands of the youth crew era, or the earliest revival of it...
  
  , a hardcore punk band
• Mouthpiece (comics)
  Mouthpiece (comics)
  Mouthpiece is a fictional comic book character from the golden age of comic books who was published by Quality Comics. He first appeared in Police Comics #1 , along with the heroes Plastic Man, Firebrand, and the Human Bomb, and lasted until #13. He was created by Fred Guardineer...
  
  , a DC comics character
• The Mouthpiece
  The Mouthpiece
  The Mouthpiece is a 1932 crime drama film directed by James Flood and Elliott Nugent.-Selected cast:*Warren William as Vincent 'Vince' Day*Sidney Fox as Celia Farraday*Aline MacMahon as Miss Hickey, Day's secretary*John Wray as Mr. Barton...
  
  , a 1932 crime drama film directed by James Flood and Elliott Nugent
• Figuratively and with negative connotations to indicate the role of a spokesperson or mass media
  Mass media
  Mass media refers collectively to all media technologies which are intended to reach a large audience via mass communication. Broadcast media transmit their information electronically and comprise of television, film and radio, movies, CDs, DVDs and some other gadgets like cameras or video consoles...
  
  venue that is used to perpetuate the views or agenda of another, as in "the newspaper became a mouthpiece for its owner's political views."