(1):
(n.) The hair that covers the brow (ridge over the eyes); the eyebrow.
(2):
(n.) The forehead; as, a feverish brow.
(3):
(n.) The general air of the countenance.
(4):
(n.) The edge or projecting upper part of a steep place; as, the brow of a precipice; the brow of a hill.
(5):
(v. t.) To bound to limit; to be at, or form, the edge of.
(6):
(n.) The prominent ridge over the eye, with the hair that covers it, forming an arch above the orbit.