auditorium

[ aw-di-tawr-ee-uh m, -tohr- ]
/ ˌɔ dɪˈtɔr i əm, -ˈtoʊr- /

noun, plural au·di·to·ri·ums, au·di·to·ri·a [aw-di-tawr-ee-uh, -tohr-] /ˌɔ dɪˈtɔr i ə, -ˈtoʊr-/.

the space set apart for the audience in a theater, school, or other public building.
a building for public gatherings; hall.

Origin of auditorium

1720–30; < Latin: lecture hall; see auditor, -tory2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for auditoria

auditorium
/ (ˌɔːdɪˈtɔːrɪəm) /

noun plural -toriums or -toria (-ˈtɔːrɪə)

the area of a concert hall, theatre, school, etc, in which the audience sits
US and Canadian a building for public gatherings or meetings

Word Origin for auditorium

C17: from Latin: a judicial examination, from audītōrius concerning a hearing; see auditory
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012