hair

hair /ˈheɚ/ noun
plural hairs
hair
/ˈheɚ/
noun
plural hairs
Britannica Dictionary definition of HAIR
1 
a  [count] : a thin threadlike growth from the skin of a person or animal
b  [noncount] : a covering or growth of hairs
c  [noncount] : the covering of hairs on a person's head
2 
[singular] informal : a very small distance or amount

hair of the dog (that bit you)

informal
: an alcoholic drink that is taken by someone to feel better after having drunk too much at an earlier time

hide or hair, hide nor hair

— see 2hide

in your hair

informal
◊ Someone who is in your hair is bothering or annoying you.

keep your hair on

British, informal
— used to tell someone not to become too excited or upset

let your hair down

informal
: to relax and enjoy yourself

make your hair curl

informal
◊ If something makes your hair curl, it frightens, shocks, or surprises you.

make your hair stand on end

informal
◊ If something makes your hair stand on end, it frightens you.

not have a hair out of place

informal
: to have a very neat appearance

not turn a hair

informal
: to remain calm even though something frightening or shocking has happened

out of your hair

informal
◊ Someone who is out of your hair is no longer bothering or annoying you.

pull your hair out

informal or tear your hair out
: to be very worried or upset about something

split hairs

: to argue about small details or differences that are not important
— see also hairsplitting

— haired

/ˈheɚd/ adjective

— hairless

/ˈheɚləs/ adjective