(noun, adjective)


1. very thin, as thin as a hair

- There was a hairline crack in the airplane's wing.


1. a very thin line

Definition categories: communication, line

2. the natural margin formed by hair on the head

Definition categories: body, bound, boundary, bounds

Sentences with hairline as a noun:

- It's just a receding hairline -- it's not like you're going bald.