eyebrow

UK: /ˈaɪbraʊ/ US: (ī′brou′)

WordReference Random House Learner's Dictionary of American English © 2025

eye•brow, n. [countable]

1. Anatomy the fringe of hair growing on the bony arch or ridge above the top part of the eye.

Idioms

2. raise eyebrows, to cause shock or surprise:
   Your revolutionary proposal is sure to raise a few eyebrows.

WordReference Random House Unabridged Dictionary of American English © 2025

eye•brow  (ī′brou′), n. 

1. Anatomy the arch or ridge forming the upper part of the orbit of the eye.
2. Anatomy the fringe of hair growing on this arch or ridge.
3. Architecture a dormer having a roof that is an upwardly curved continuation of the main roof plane.
4. Printing kicker (def. 9).
5. Nautical, Naval Terms a curved molding protecting a port from falling or dripping water.

• eye + brow 1575–85

Collins Concise English Dictionary © HarperCollins Publishers::

eyebrow / ˈaɪˌbraʊ/ noun

1. the transverse bony ridge over each eye
2. the arch of hair that covers this ridge
3. raise an eyebrow ⇒
   See raise32