auditorium

noun /ˌɔːdɪˈtɔːriəm/
  1. the part of a theatre, concert hall, etc. in which the audience sits
    • The auditorium seats over a thousand people.
    • You will be taken on a guided tour of the theatre, including the stage, auditorium and backstage areas.
  2. (especially North American English) a large building or room in which public meetings, concerts, etc. are held
    • He stood at the back of the packed auditorium.
    • The new building will include an exhibition hall, auditorium, bookshop and restaurant.
Origin: late 16th cent. (originally denoting a person who supported a great burden): via Latin from Greek Atlas, the name of one of the Titans who was made to support the heavens as punishment for his part in the revolt against the god Zeus. His picture appeared at the front of early atlases.

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