1. One of the bony outgrowths on the heads of certain ungulates
   "The mountain goat's horns were curved and sharp"
    
2. A device on an automobile for making a warning noise
   "He honked the automobile horn to alert the pedestrian";
   - automobile horn, car horn, motor horn, hooter
    
3. A noise made by the driver of an automobile to give warning
   "The driver honked his horn to alert the pedestrian"
    
4. A brass musical instrument with a brilliant tone; has a narrow tube and a flared bell and is played by means of valves
   "The horn player's solo was the highlight of the concert";
   - cornet, trumpet, trump [archaic]
    
5. A brass musical instrument consisting of a conical tube that is coiled into a spiral and played by means of valves
   "The French horn solo in the symphony was particularly moving";
   - French horn
    
6. Any hard protuberance from the head of an organism that is similar to or suggestive of a horn
   "The rhinoceros beetle has a prominent horn on its head"
    
7. The material (mostly keratin) that covers the horns of ungulates and forms hooves and claws and nails
   "Traditional Chinese medicine sometimes uses powdered rhinoceros horn"
    
8. A high pommel of a Western saddle (usually metal covered with leather)
   "The cowboy gripped the saddle horn as he mounted his horse";
   - saddle horn
    
9. A device having the shape of a horn
   "the cleat had two horns"; "horns at the ends of a new moon"; "the horn of an anvil"
    
10. An alarm device that makes a loud warning sound
    "The ship's horn blared to signal its approach to the harbour"
     
11. (game) a noisemaker (as at parties or games) that makes a loud noise when you blow through it
    "Children blew their horns enthusiastically at the New Year's party"

1. Stab or pierce with a horn or tusk
   "the rhino horned the explorer";
   - tusk

Derived forms: horned, horns, horning

Type of: alarm, alarm system, alarum [archaic], alert, animal material, appendage, brass, brass instrument, device, noisemaker, outgrowth, pierce, pommel, process, saddlebow, thrust, warning device, warning signal

Part of: auto [informal], autocar [archaic], automobile [N. Amer], bull, caprine animal, car, goat, motor [Brit, informal], motorcar, ram, stock saddle, tup [Brit], Western saddle, wheel [informal], whip [US, informal]

Encyclopedia: Horn, Rebecca