Definition of auditorium noun from the Oxford Advanced American Dictionary

     

    auditorium

     noun
    noun
    NAmE//ˌɔdəˈtɔriəm//
     
    (pl. auditoriums or auditoria
    NAmE//‑ˈtɔriə//
     
    )
     
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  1. 1 a large building or room in which public meetings, concerts, etc. are held
  2. 2the part of a theater, concert hall, etc. in which the audience sits
See the Oxford Advanced Learner's Dictionary entry: auditorium