Definition of orchestra noun from the Oxford Advanced American Dictionary

     

    orchestra

     noun
    noun
    NAmE//ˈɔrkəstrə//
     
     
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  1. 1 [countable] a large group of people who play various musical instruments together, led by a conductor She plays the flute in the school orchestra. the Philadelphia Symphony Orchestra The competition gave the young composer her first opportunity to write for a full orchestra. see also chamber orchestra, symphony orchestra
  2. 2 the orchestra [singular] the seats that are nearest to the stage in a theater We have orchestra seats for the ballet.
See the Oxford Advanced Learner's Dictionary entry: orchestra