A wind instrument of music; originally, one made of a horn (of an ox or a ram); now applied to various elaborately wrought instruments of brass or other metal, resembling a horn in shape.

A type of loudspeaker (qv), used for mid to high frequency sounds. Musicans also use the term to refer to their instruments (usually brass instruments but occasionally woodwind too).

a brass musical instrument with a brilliant tone; has a narrow tube and a flared bell and is played by means of valves

a brass musical instrument consisting of a conical tube that is coiled into a spiral and played by means of valves

A wind instrument; or any instrument.

Literally, a brass instrument, but commonly used by jazz musicians to refer to any wind instrument, and occassionally other instruments as well

any instrument, not simply the brass and the reeds.

The horn is a brass instrument that consists of tubing wrapped into a coiled form, now with finger-operated valves to help control the pitch but originally without valves to control the pitch (this kind of horn is now called a natural horn, which is a retronym since at that time, all French horns had were natural horns.) The instrument was first developed in England as a hunting horn in about 1650. The French refer to the modern valved instrument as the horn of harmony, the Germans call it the hunting horn, and the English and Americans call it the French horn.