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

Morrissey himself hasn’t commented on the cancellation either through social media or his usual mouthpiece fan websites. —Daniel Kreps, Rolling Stone, 6 Nov. 2025

The steps of the terrazzo staircase are intended to look like white piano keys while the jewelry area features a metal mesh backdrop similar to the comb on the mouthpiece of a harmonica. —Jean E. Palmieri, Footwear News, 16 Oct. 2025

The bubble of my laughter echoes in my mouthpiece. —Literary Hub, 10 Oct. 2025

Owala 16-Ounce Water Bottle Finding a water bottle for my kid that is easy to close, doesn’t have a silicone straw or mouthpiece, and doesn’t leak has been a journey. —Lauren Silbert, PEOPLE, 8 Oct. 2025

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