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

And my father—lovable but imposing, a strapping six feet three inches tall with a thick, bristly mustache and a rumbling Sergeant Schultz accent that frightened my friends half to death—loved to tell stories. —CBS News, 5 Dec. 2025

Meaning you don’t have to go to a high end haunt where the staff sports vests and mustaches to find a decent drink. —Tiney Ricciardi, Denver Post, 3 Dec. 2025

Oscar Van Rhijn’s mustache and drawling line deliveries suggest a dab of villainy, a vibe only strengthened by his scheming with Kelley Curran’s sneaky Enid Winterton. —Kathryn Vanarendonk, Vulture, 1 Dec. 2025

His mustache alone should have disqualified him for private service. —Cressida Leyshon, New Yorker, 23 Nov. 2025

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)