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

Qajar-dynasty kitsch—kings with walrus mustaches and embellished turbans, women with unibrows in tunics—became ubiquitous as a motif in contemporary art, on the walls of cafés, on teapots. —Azadeh Moaveni, New Yorker, 22 Mar. 2026

The mustache required fewer pixels to animate than a mouth, and the overalls helped clearly define Mario’s movements. —Alexander Kaplan, The Washington Examiner, 20 Mar. 2026

And the three main villains are impressively restrained compared to the cartoonish mustache twirlers that have populated previous takes. —Jon O'Brien, IndieWire, 19 Mar. 2026

The mad rush of A-listers coming through included Leonardo DiCaprio (with a serious mustache), Channing Tatum (hand in hand with girlfriend Inka Williams), Kate Hudson, Gwyneth Paltrow, and Steven Spielberg. —Rebecca Ford, Vanity Fair, 16 Mar. 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)