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

Saliva collects at the mouthpiece and distorts the notes, making the blasts sound hoarse and off-pitch. — Lois K. Solomon, Sun Sentinel, 27 Aug. 2026

In the film, cartoon legend Coyote (who can’t speak, of course) hires a reluctant, unambitious lawyer Kevin Avery (East Bay native Will Forte) to be his mouthpiece and legal advocate. — Randy Myers, Mercury News, 26 Aug. 2026

The goal is for doctors someday to be able to use the information from the mouthpiece scan to treat head injuries. — Kristine Sorensen, CBS News, 24 Aug. 2026

Its cover features Jackson wearing headphones and biting down on a mouthpiece as if she’s being prepped for shock treatment. — Brian Niemietz, New York Daily News, 18 Aug. 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