horn

A hard growth of keratin that protrudes from the top of the head of certain animals, usually paired.

Any similar real or imaginary growth or projection such as the elongated tusk of a narwhal, the eyestalk of a snail, the pointed growth on the nose of a rhinoceros, or the hornlike projection on the head of a demon or similar.

An antler.

The hard substance from which animals' horns are made, sometimes used by man as a material for making various objects.

“an umbrella with a handle made of horn”

An object whose shape resembles a horn, such as cornucopia, the point of an anvil, or a vessel for gunpowder or liquid.

Any of several musical wind instruments.

An instrument resembling a musical horn and used to signal others.

“hunting horn”

A loud alarm, especially one on a motor vehicle.

A sound signaling the expiration of time.

“The shot was after the horn and therefore did not count.”

A conical device used to direct waves.

“antenna horn”

Generally, any brass wind instrument.

(from the horn-shaped earpieces of old communication systems that used air tubes) A telephone.

“Get him on the horn so that we can have a discussion about this.”

(definite article) An erection of the penis.

A peninsula or crescent-shaped tract of land.

“to navigate around the horn”

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.

An incurved, tapering and pointed appendage found in the flowers of the milkweed (Asclepias).

(of an animal) To assault with the horns.

To furnish with horns.

To cuckold.