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 mammalb : 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>
5 : a filamentous structure that resembles hair <leaf hair>
hairlikeplay \-ˌlīk\ adjective
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>
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.
Origin and Etymology of hair
Middle English, from Old English hǣr; akin to Old High German hār hair
First Known Use: before 12th century
HAIR Defined for English Language Learners
Definition of hair for English Language Learners
: a thin threadlike growth from the skin of a person or animal
: a covering or growth of hairs
: the covering of hairs on a person's head
HAIR Defined for Kids
Definition of hair for Students
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.>
haired\ˈherd\ adjective <a long-haired dog>
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
Seen and Heard
What made you want to look up hair? Please tell us where you read or heard it (including the quote, if possible).