• A hard growth of keratin that protrudes from the top of the head of certain animals, usually paired.
  • Any similar real or imaginary growth or projection such as the elongated tusk of a narwhal, the eyestalk of a snail, the pointed growth on the nose of a rhinoceros, or the hornlike projection on the head of a demon or similar.
  • An antler.
  • The hard substance from which animals' horns are made, sometimes used by man as a material for making various objects.
  • An object whose shape resembles a horn, such as cornucopia, the point of an anvil, or a vessel for gunpowder or liquid.
  • Any of several musical wind instruments.
  • An instrument resembling a musical horn and used to signal others.
  • A loud alarm, especially one on a motor vehicle.
  • A sound signaling the expiration of time.
  • A conical device used to direct waves.
  • Generally, any brass wind instrument.
  • A telephone.
  • An erection of the penis.
  • A peninsula or crescent-shaped tract of land.
  • A diacritical mark that may be attached to the top right corner of the letters o and u when writing in Vietnamese, thus forming ơ and ư.
  • An incurved, tapering and pointed appendage found in the flowers of the milkweed (Asclepias).


  • To assault with the horns.
  • To furnish with horns.
  • To cuckold.


  • From Middle English horn, horne, from Old English horn, from Proto-West Germanic *horn, from Proto-Germanic *hurną. Compare West Frisian hoarn, Dutch hoorn, Low German Hoorn, horn, German Horn, Danish and Swedish horn, Gothic 𐌷𐌰𐌿𐍂𐌽.
  • Ultimately from Proto-Indo-European, from *ḱerh₂-. Compare Breton kern ("horn"), Latin cornū, Ancient Greek κέρας, Proto-Slavic *sьrna, Old Church Slavonic сьрна ("roedeer"), Hittite ("horn"), Persian سور, Sanskrit शृङ्ग ("horn").

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