auditorium
n. countable B2 Upper Intermediate US //ˌɔdəˈtɔɹiəm// UK //ˌɔːdɪtˈɔːɹiəm// au·di·to·ri·um
n. a large room or building designed for an audience to watch a performance or listen to a speaker.
n. a large hall or theatre designed for public gatherings, lectures, or performances.
The students gathered in the school auditorium.
We booked the main auditorium for the annual charity concert.
The historic auditorium, with its vaulted ceiling and tiered seating, remains the cultural heart of the city.
Borrowed from Latin audītōrium, from audītōrius (“pertaining to hearing”). Equivalent to auditory + -ium.