noun, often attributive
\ ˈher How to pronounce hair (audio) \

Definition of hair

1a : a slender threadlike outgrowth of the epidermis of an animal especially : one of the usually pigmented filaments that form the characteristic coat of a mammal
b : the hairy covering of an animal or a body part especially : the coating of hairs on a human head
2 : haircloth
3a : a minute distance or amount won by a hair
b : a precise degree aligned to a hair
4 obsolete : nature, character
5 : a filamentous structure that resembles hair leaf hair
in one's hair
: persistently and annoyingly in one's presence can't work with you in my hair all day
out of one's hair
: out of one's way : not in one's hair keep the children out of his hair for a while

Illustration of hair

Illustration of hair

hair 1a: 1 shaft, 2 sebaceous gland, 3 epidermis, 4 dermis, 5 hair follicle, 6 bulb, 7 papilla

Other Words from hair

hairless adjective
hairlessness noun
hairlike \ ˈher-​ˌlīk How to pronounce hair (audio) \ adjective

Examples of hair in a Sentence

He plucked a hair from his arm. There are dog hairs all over my coat. The hair on her arms is blond. He has a lot of hair on his chest. He got his hair cut last week. He has a thick head of hair. a balding man who is losing his hair He won the race by a hair. He was a hair off on the count. See More
Recent Examples on the Web Her hair changed shades of blonde all the time, and got shorter and longer. Erica Gonzales, ELLE, 17 June 2022 In a teaser image for the drop Grande shared to Instagram on June 16, her hair is styled into a half-up, half-down look with long curtain bangs. Gabi Thorne, Allure, 17 June 2022 Her hair was sleek, pulled behind her ears; her makeup was also minimal, with the exception of a deep pink lip. Melody Leibner, Harper's BAZAAR, 16 June 2022 The wings in his hair, the clothes, the Cadillac, all the hand gestures, the voice, the comedic relief, everything about Paulie was just perfection. Josh Newman, The Salt Lake Tribune, 16 June 2022 After spending 30 minutes on his hair, Peck proceeded to the prosthetics trailer, where Bridges was. Scott Mantz, Variety, 15 June 2022 Chicago police Superintendent David Brown has filed disciplinary charges with the Chicago Police Board against an officer who is accused of dragging a woman by her hair out of a car and kneeling on her neck in 2020. Paige Fry, Chicago Tribune, 15 June 2022 Both women were dressed like their pioneer ancestors in long prairie dresses with their hair swooped up front and pulled into a bun in back. David Kelly, Los Angeles Times, 14 June 2022 According to the defense, Keen-Warren rode in the car at some point, and that’s why her hair was found in the car. Lenny Cohen, Sun Sentinel, 14 June 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hair.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of hair

before the 12th century, in the meaning defined at sense 1a

History and Etymology for hair

Middle English, from Old English hǣr; akin to Old High German hār hair

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Time Traveler for hair

Time Traveler

The first known use of hair was before the 12th century

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Dictionary Entries Near hair



hair's breadth

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Statistics for hair

Last Updated

20 Jun 2022

Cite this Entry

“Hair.” Dictionary, Merriam-Webster, Accessed 28 Jun. 2022.

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More Definitions for hair


\ ˈher How to pronounce hair (audio) \

Kids Definition of hair

1 : a threadlike growth from the skin of a person or animal She pulled out a hair.
2 : a covering or growth of hairs I got my hair cut.
3 : something (as a growth on a leaf) like an animal hair
4 : a very small distance or amount I won by a hair.

Other Words from hair

haired \ ˈherd \ adjective a long-haired dog
hairless \ ˈher-​ləs \ adjective
hairlike \ -​ˌlīk \ adjective


noun, often attributive
\ ˈha(ə)r, ˈhe(ə)r How to pronounce hair (audio) \

Medical Definition of hair

1 : a slender threadlike outgrowth of the epidermis of an animal especially : one of the usually pigmented filaments that form the characteristic coat of a mammal
2 : the hairy covering of an animal or a body part especially : the coating of hairs on a human head

Other Words from hair

hairlike \ -​ˌlīk How to pronounce hair (audio) \ adjective

More from Merriam-Webster on hair

Nglish: Translation of hair for Spanish Speakers

Britannica English: Translation of hair for Arabic Speakers Encyclopedia article about hair


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