mustache

noun

mus·​tache ˈmə-ˌstash  (ˌ)mə-ˈstash 

variants or less commonly moustache

1

: the hair growing on the human upper lip

especially : such hair grown and often trimmed in a particular style

… his long mustache combed and waxed …

—Henry Petroski

2

: hair or bristles about the mouth of a mammal

mustached adjective

or less commonly moustached

ˈmə-ˌstasht 

(ˌ)mə-ˈstasht

Examples of mustache in a Sentence

He used a small pair of scissors to trim his mustache.

He decided to grow a mustache.

The actor was wearing a false mustache.

Recent Examples on the Web

On a typical day this July, around four Roosevelt impersonators were roaming the streets, identifiable by their mustaches, stout bellies, and dispensing of homespun wisdom. — Rachel Monroe, New Yorker, 17 Aug. 2026

Jimmy rubbed beer foam off his mustache, and Kath thought of the drunken Norwegian boatman who sank Fanny’s ship. — Literary Hub, 11 Aug. 2026

Shanahan had the mustache during Saturday’s press conference. — Chris Biderman, Sacbee.com, 8 Aug. 2026

Next comes the arrival of a tinkling blue ice cream truck manned by an eerily silent, smiling, wraith-like purveyor (Ari Millen) with a John Waters mustache. — Robert Abele, Los Angeles Times, 7 Aug. 2026

Word History

Etymology

Middle French moustache, from Old Italian mustaccio, from Middle Greek moustaki, diminutive of Greek mystak-, mystax upper lip, mustache

First Known Use

1585, in the meaning defined at sense 1

Phrases Containing mustache

• Fu Manchu mustache
• handlebar mustache

Rhymes for mustache

• backlash
• chumash
• eyelash
• moustache
• noncash
• potash
• rehash
• whiplash
• ash
• bash
• brash
• cache

Kids Definition

mustache

noun

mus·​tache

variants also moustache

ˈməs-ˌtash, 

(ˌ)məs-ˈtash

1

: the hair growing on the human upper lip

2

: hair or bristles about the mouth of a mammal (as a walrus)