| horn | one of the bony outgrowths on the heads of certain ungulates |
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| horn | any outgrowth from the head of an organism that resembles a horn |
| horn | a device on an automobile for making a warning noise |
| horn | a brass musical instrument with a brilliant tone |
| horn | a brass musical instrument consisting of a conical tube that is coiled into a spiral and played by means of valves |
| horn | an alarm device that makes a loud warning sound |
| horn | a high pommel of a Western saddle (usually metal covered with leather) |
| horn | a noisemaker (as at parties or games) that makes a loud noise when you blow through it |
| horn | a noise made by the driver of an automobile to give warning |
| horn | the material (mostly keratin) that covers the horns of ungulates and forms hooves and claws and nails |
| horn | stab or pierce with a horn or tusk |
| horn | a button that you press to activate the horn of an automobile |