noun
auditorium
aw-di-TOR-ee-um/ˌɔːdɪˈtɔːriəm/
A large room or hall where an audience gathers for an event.
Rows of empty seats face the stage inside the spacious auditorium.

Etymology
The pieces describe a place for hearing. The Latin word named a lecture room, an image preserved in the modern hall where an audience gathers to hear talks or performances.
In context
it is a huge Auditorium I mean people have paid top dollar to hear this Nobel Laureate talk
More examples
- Every seat in the auditorium was taken.
- The school has two auditoriums of different sizes.
- A microphone carried her voice to the back of the auditorium.
Forms
auditorium · auditoriums · auditoria