WordReference Random House Learner's Dictionary of American English © 2015
trom•bone /trɑmˈboʊn, ˈtrɑmboʊn/USA pronunciation n. [countable]

    Music and Dancea musical wind instrument consisting of a rounded metal tube expanding into a bell and bent twice into aUshape, and having a slide for varying the tone.

Collins Concise English Dictionary © HarperCollins Publishers::

trombone /trɒmˈbəʊn/ n
  1. 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)
Etymology: 18th Century: from Italian, from tromba a trumpet, from Old High German trumba

tromˈbonist n

'trombone' also found in these entries:

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