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.

noun

countenance , eyebrow , face , frons , front , mien , temple , top , bound , brim , brink , eye , forehead , ridge , rim , slope