n (countable) An instrument resembling a musical horn and used to signal others.
n (countable) A loud alarm, especially one on a motor vehicle.
n (countable) A conical device used to direct waves.
n (informal|countable) Generally, any brass wind instrument.
n (slang|countable|from the horn-shaped earpieces of old communication systems that used air tubes) A telephone.
n (uncountable|coarse|slang|definite article) An erection of the penis.
n (countable) A peninsula or crescent-shaped tract of land. "to navigate around the horn."
n (countable) 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'.
v (context|of an animal) To assault with the |horns