brow

Etymology

From Middle English browe, from Old English brū, from Proto-Germanic *brūwō, from Proto-Indo-European *h₃bʰrúHs (“brow”) (compare Middle Irish brúad, Tocharian B pärwāne (“eyebrows”), Lithuanian bruvìs, Serbo-Croatian obrva, Russian бровь (brovʹ), Ancient Greek ὀφρύς (ophrús), Sanskrit भ्रू (bhrū)), Persian ابرو (abru, “eyebrow”)).

noun

1. The ridge over the eyes; the eyebrow.
   And his arch'd brow, pulled o'er his eyes, / With solemn proof proclaims him wise. c. 1763, Charles Churchill, The Ghost
2. The first tine of an antler's beam.
3. The forehead.
   Mr. Banks’ panama hat was in one hand, while the other drew a handkerchief across his perspiring brow. 1913, Robert Barr, chapter 5, in Lord Stranleigh Abroad
4. The projecting upper edge of a steep place such as a hill.
   the brow of a precipice
5. (mining) A gallery in a coal mine running across the face of the coal.
6. (figurative) Aspect; appearance.
7. (nautical) The gangway from ship to shore when a ship is lying alongside a quay.
8. (nautical) The hinged part of a landing craft or ferry which is lowered to form a landing platform; a ramp.

verb

1. To bound or limit; to be at, or form, the edge of.