a musical wind instrument consisting of a cylindrical metal tube expanding into a bell and bent twice in a U shape, usually equipped with a slide (slide trombone)
Origin: 1715–25; < Italian, equivalent to tromb(a) trumpet (< Provençal < Germanic; compare Old High Germantrumpa, trumba horn, trumpet) + -one augmentative suffix
a brass instrument, a low-pitched counterpart of the trumpet, consisting of a tube the effective length of which is varied by means of a U-shaped slide. The usual forms of this instrument are the tenor trombone (range: about two and a half octaves upwards from E) and the bass trombone (pitched a fourth lower)
2.
a person who plays this instrument in an orchestra
[C18: from Italian, from tromba a trumpet, from Old High German trumba]
A brass instrument; the player can change its pitch by sliding one part of the tube in and out of the other. The tone of the trombone is mellower than that of the trumpet.