Question

noun1 the part of a theatre, concert hall, or other public building in which the audience sits.2 chiefly N. Amer. a large building or hall used for public gatherings, typically concerts or sports events.

Accepted Answer

auditorium

Front	noun 1 the part of a theatre, concert hall, or other public building in which the audience sits. 2 chiefly N. Amer. a large building or hall used for public gatherings, typically concerts or sports events.
Back	auditorium

Public Building Noun Part Theatre Concert Hall Audience