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orchestra

noun [C, + sing/pl verb] (MUSIC)
 
 
/ˈɔː.kɪ.strə/ US  /ˈɔːr-/

Definition

B1 a large group of musicians who play many different instruments together and are led by a conductor: She's a cellist in the City of Birmingham Symphony Orchestra.Groups of musicians orchestral
 
 
/ɔːˈkes.trəl/ US  /ɔːr-/ adjective
B2 an orchestral arrangementTypes of music
(Definition of orchestra noun (MUSIC) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of orchestra