mouthpiece

noun

mouth·​piece ˈmau̇th-ˌpēs 

1

: something placed at or forming a mouth

2

: a part (as of an instrument) that goes in the mouth or to which the mouth is applied

3

a

: one that expresses or interprets another's views : spokesperson

b

slang : a criminal lawyer

Synonyms of mouthpiece

• spokesperson
• spokesman

Examples of mouthpiece in a Sentence

the mouthpiece of a trumpet

He's been acting as a mouthpiece for the government on questions of foreign policy.

The company has hired an attorney as a mouthpiece to answer its critics.

Recent Examples on the Web

But one of his other assets became the center of a political firestorm whenYinon Magal, a prominent TV host widely considered a mouthpiece for Benjamin Netanyahu, blasted the prime minister’s main rival. — Tal Shalev, CNN Money, 24 Oct. 2026

Later that season, Chicago Bears receiver Javon Wims threw a right hook at him during a live game after Gardner-Johnson ripped Wims' mouthpiece off his helmet. — Alejandro Avila Outkick, FOXNews.com, 19 Oct. 2026

A couple seemingly significant lines of dialogue come out garbled through the mouthpiece. — Amy Nicholson, Los Angeles Times, 15 Oct. 2026

The mouthpiece sits flat in the lid when not in use, then flips up for a sip. — New Atlas, 14 Oct. 2026

Word History

First Known Use

1673, in the meaning defined at sense 1

Rhymes for mouthpiece

• apiece
• aris
• assise
• caprice
• cerise
• decease
• decrease
• eyepiece
• facepiece
• handpiece
• headpiece
• increase

Kids Definition

mouthpiece

noun

mouth·​piece -ˌpēs 

1

: the part put to, between, or near the lips

the mouthpiece of a trumpet

the mouthpiece of a telephone

2

: someone who expresses another person's ideas : spokesperson