mustache

American  

[muhs-tash, muh-stash] / ˈmʌs tæʃ, məˈstæʃ /

Or moustache

noun

1. the hair growing on the upper lip

2. such hair on men, allowed to grow without shaving, and often trimmed in any of various shapes.

3. hairs or bristles growing near the mouth of an animal.

4. a stripe of color, or elongated feathers, suggestive of a mustache on the side of the head of a bird.

5. something resembling a mustache, as food or drink adhering to the upper lip.

   a mustache of milk.

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mustache British  

/ məˈstɑːʃ /

noun

1. the US spelling of moustache

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Other Word Forms

• mustached adjective

Etymology

Origin of mustache

1575–85; < Middle French moustache < Italian mostaccio; mustachio

Example Sentences

The mannequin wearing a baseball cap in Glendora and one with a drawn-on mustache in the Bay Area.

From Los Angeles Times • Mar. 17, 2026

On the US State Department's reward card, he appears with a sharp face, neatly combed hair and a thin mustache.

From Barron's • Feb. 23, 2026

His walrus mustache, once the world’s most famous facial hair, is white as winter.

From The Wall Street Journal • Feb. 13, 2026

More recently, he posted an A.I.-generated video of himself drinking whole milk and dancing, his upper lip adorned with a milk mustache.

From Slate • Jan. 28, 2026

First up to speak was Mr. Dimblewit, a witch of medium height but enormous of mustache.

From "Witchlings" by Claribel A. Ortega