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auditorium

[aw-di-tawr-ee-uh m, -tohr-]
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noun, plural au·di·to·ri·ums, au·di·to·ri·a [aw-di-tawr-ee-uh, -tohr-] /ˌɔ dɪˈtɔr i ə, -ˈtoʊr-/.
  1. the space set apart for the audience in a theater, school, or other public building.
  2. a building for public gatherings; hall.
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Origin of auditorium

1720–30; < Latin: lecture hall; see auditor, -tory2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for auditoria

auditorium

noun plural -toriums or -toria (-ˈtɔːrɪə)
  1. the area of a concert hall, theatre, school, etc, in which the audience sits
  2. US and Canadian a building for public gatherings or meetings
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Word Origin

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

Word Origin and History for auditoria

auditorium

n.

1727, from Latin auditorium "lecture room," literally "place where something is heard," neuter of auditorius (adj.) "of or for hearing," from auditus, past participle of audire "to hear" (see audience); also see -ory. Earlier in the same sense was auditory (late 14c.).

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Online Etymology Dictionary, © 2010 Douglas Harper