Brow

Anatomy. the ridge over the eye.
the hair growing on that ridge; eyebrow.
the forehead:
He wore his hat low over his brow.
a person’s countenance or mien.
the edge of a steep place:
She looked down over the brow of the hill.
gangplank.
Contemporary Examples

Opening Day 2013: How to Write About Baseball in the Big Leagues Noah Charney March 30, 2013
Relishing Rembrandt’s Blockbuster London Show Nancy Durrant October 15, 2014
When An Adopted Child Won’t Attach Tina Traster May 1, 2014
Native American Basketball Team in Wyoming Have Hoop Dreams Of Their Own Robert Silverman August 30, 2014
Meet Hollywood’s Eyebrow King, Damone Roberts Allison Samuels August 17, 2013

Historical Examples

The Return of Sherlock Holmes Arthur Conan Doyle
The White Company Arthur Conan Doyle
Modern Persia Mooshie G. Daniel
In the Midst of Alarms Robert Barr
Double Harness Anthony Hope

noun
the part of the face from the eyes to the hairline; forehead
short for eyebrow
the expression of the face; countenance: a troubled brow
the top of a mine shaft; pithead
the jutting top of a hill, etc
(Northern English, dialect) a steep slope on a road
n.

see:

by the sweat of one’s brow
cause raised eyebrows