Dictionary definition · horn
noun
- a noisemaker (as at parties or games) that makes a loud noise when you blow through it
- one of the bony outgrowths on the heads of certain ungulates
- a noise made by the driver of an automobile to give warning
- a high pommel of a Western saddle (usually metal covered with leather)
- a brass musical instrument with a brilliant tone; has a narrow tube and a flared bell and is played by means of valves
- any hard protuberance from the head of an organism that is similar to or suggestive of a horn
- the material (mostly keratin) that covers the horns of ungulates and forms hooves and claws and nails
- a device having the shape of a horn"horns at the ends of a new moon"
- an alarm device that makes a loud warning sound
- a brass musical instrument consisting of a conical tube that is coiled into a spiral and played by means of valves
- a device on an automobile for making a warning noise
verb
- stab or pierce with a horn or tusk"the rhino horned the explorer"
Source: Open English WordNet (CC BY 4.0).