BRASS INSTRUMENT

noun Date: 1843 any of a group of wind instruments (as a French horn, trombone, trumpet, or tuba) that is usually characterized by a long cylindrical or conical metal tube commonly curved two or more times and ending in a flared bell, that produces tones by the vibrations of the player's lips against a usually cup-shaped mouthpiece, and that usually has valves or a slide by which the player may produce all the tones within the instrument's range