Trōm'bōne, n.

(It. pron. trom-bo'nā) (Synop., § 130), n. [It. trombone, augmentative of tromba, a trumpet; Fr. trombone.] (Mus.) A deep-toned brass instrument of the trumpet kind, consisting of three tubes, of which the first, to which the mouth-piece is attached, and the third, which terminates in a bell-shaped orifice, are placed side by side, the middle tube being doubled, and sliding into the other two like the tube of a telescope. By the sliding of the tube it commands every tone throughout its whole compass, and surpasses every other wind instrument in admitting, like the violin or the voice, the introduction of the slide.