Illustration of hair
- 1 shaft
- 2 sebaceous gland
- 3 epidermis
- 4 dermis
- 5 hair follicle
- 6 bulb
- 7 papilla
often attributive
1
2
3
a
: a minute distance or amount
won by a hair
b
: a precise degree
aligned to a hair
5
: a filamentous structure that resembles hair
leaf hair
see also:
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.
Recent Examples on the Web
By week eight, 31% of those treated with PP405 had a 20% increase in hair density, compared to 0% in the placebo group, according to a Pelage press release.
—
The Week Uk, TheWeek, 27 Mar. 2026
That’s a significant claim backed by a dermatologist’s endorsement — a key trust signal when evaluating hair loss products.
—Kansas City Star, 27 Mar. 2026
Biometrics are methods of authentication that rely on unique physical characteristics to identify you—think your hair, face, fingerprint, and even your DNA.
—Justyn Newman, PC Magazine, 27 Mar. 2026
Riley has had a fine spring after tinkering with his swing (and his facial hair) in the offseason.
—Tyler Estep, AJC.com, 27 Mar. 2026
See All Example Sentences for hair
Examples are automatically compiled from online sources to
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The Week Uk, TheWeek, 27 Mar. 2026
That’s a significant claim backed by a dermatologist’s endorsement — a key trust signal when evaluating hair loss products.
—Kansas City Star, 27 Mar. 2026
Biometrics are methods of authentication that rely on unique physical characteristics to identify you—think your hair, face, fingerprint, and even your DNA.
—Justyn Newman, PC Magazine, 27 Mar. 2026
Riley has had a fine spring after tinkering with his swing (and his facial hair) in the offseason.
—Tyler Estep, AJC.com, 27 Mar. 2026
See All Example Sentences for hair
Cite this Entry
“Hair.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hair. Accessed 28 Mar. 2026.
Copy CitationKids Definition
hair
noun
ˈha(ə)r 
ˈhe(ə)r
1
a
: a slender threadlike growth from the skin of an animal
especially
: one that usually contains coloring and forms part of the characteristic coat of a mammal
b
: a covering or growth of hairs of an animal or a body part
2
: a tiny distance or amount
won by a hair
3
: a threadlike structure that resembles hair
leaf hairs
haired
adjective
ˈha(ə)rd,
ˈhe(ə)rd
hairless
adjective
ˈha(ə)r-ləs,
ˈhe(ə)r-
Medical Definition
hair
nounoften attributive
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
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