trombone - definition and synonyms

noun [countable] 

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/trɒmˈbəʊn/
singulartrombone
pluraltrombones
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    a musical instrument consisting of two metal tubes shaped like the letter U that fit into each other, with one tube wide at one end. You play it by blowing into it as you slide one of the tubes forwards and backwards. A trombone is a brass instrument. Someone who plays the trombone is called a trombonist.