au·di·to·ri·um /ˌɔdəˈtoriəm, ˈtɔr-/
  禮堂,會議廳,聽眾
  Au·di·to·ri·um n.
  1. The part of a church, theater, or other public building, assigned to the audience.
  Note: ☞ In ancient churches the auditorium was the nave, where hearers stood to be instructed; in monasteries it was an apartment for the reception of strangers.
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  auditorium
       n : the area of a theater or concert hall where the audience
           sits
       [also: auditoria (pl)]