au ‧ di ‧ to ‧ ri ‧ um /ˌɔːdəˈtɔːriəm, ˌɔːdɪˈtɔːriəm $ ˌɒː-/ BrE AmE noun ( plural auditoriums or auditoria /-riə/) [countable]
[ Date: 1600-1700 ; Language: Latin ; Origin: 'place for hearing' , from audire ; ⇨ ↑ audio ]
1 . the part of a theatre where people sit when watching a play, concert etc
2 . American English a large building used for concerts or public meetings