horn (Noun) — (game) a noisemaker (as at parties or games) that makes a loud noise when you blow through it.
horn (Noun) — One of the bony outgrowths on the heads of certain ungulates.
horn (Noun) — A noise made by the driver of an automobile to give warning.
horn (Noun) — A high pommel of a Western saddle (usually metal covered with leather).
horn (Noun) — A brass musical instrument with a brilliant tone; has a narrow tube and a flared bell and is played by means of valves.
horn (Noun) — Any hard protuberance from the head of an organism that is similar to or suggestive of a horn.
horn (Noun) — The material (mostly keratin) that covers the horns of ungulates and forms hooves and claws and nails.
horn (Noun) — A device having the shape of a horn. ex. "horns at the ends of a new moon" ex. "the cleat had two horns"
horn (Noun) — An alarm device that makes a loud warning sound.
horn (Noun) — A brass musical instrument consisting of a conical tube that is coiled into a spiral and played by means of valves.
horn (Noun) — A device on an automobile for making a warning noise.
horn (Verb) — Stab or pierce with a horn or tusk. ex. "the rhino horned the explorer"