Definitions from Wiktionary (trombone)

▸ noun:  A musical instrument in the brass family, having a cylindrical bore, and usually a sliding tube (but sometimes piston valves, and rarely both). Most often refers to the tenor trombone, which is the most common type of trombone and has a fundamental tone of B♭ˌ (contra B♭).
▸ noun:  The common European bittern.
▸ noun:  (film, television) A kind of extendable support for attaching lighting elements to a set.
▸ verb:  (telecommunications) To transmit a signal or data back to a central switching point before sending it out to its destination.
▸ verb:  (film, slang, transitive) To extend and retract (the zoom lens); to use it too enthusiastically.

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