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English definition of “piano”

piano

noun [C or U] uk   /piˈæn.əʊ/ us    /-oʊ/ (plural pianos)
A2 a large musical instrument with a row of black and white keys that are pressed to play notes: We're buying a new piano. I play the piano. She used to play piano in a jazz band. The music was written for piano. We all joined in the song, with Pat at the piano/on piano.
(Definition of piano from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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