Definition of "hairline" in Englisch

noun

1. The line along one's forehead where hair starts growing.

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

2. A very thin line in writing, drawing, or typography.

3. A fishing line made from hair.

adjective

1. (figurative) Very thin, as thin as a hair.

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