auditorium
noun [ C ] uk/ˌɔː.dɪˈtɔː.ri.əm/ us/ˌɑː.dəˈtɔːr.i.əm/ auditoriums or auditoria uk/ˌɔː.dɪˈtɔː.ri.ə/ us/ˌɑː.dəˈtɔːr.i.ə/
（剧院等的）听众席，观众席
the part of a theatre, or similar building, where the people who are watching and listening sit
No smoking in the auditorium. 观众席中禁止吸烟。
mainly US剧院;礼堂;音乐厅
a large public building where meetings, concerts, etc. are held