The number 8 definition got me thinking bout multiple meanings.
From:
https://www.dictionary.com/browse/theater
theateror the·a·tre
[ thee-uh-ter, theeuh- ]
SEE SYNONYMS FOR theater ON THESAURUS.COM
noun
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a building, part of a building, or outdoor area for housing dramatic performances or stage entertainments, or for showing movies.
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the audience at a theatrical performance or movie: The theater wept.
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a theatrical or acting company.
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a room or hall, fitted with tiers of seats rising like steps, used for lectures, surgical demonstrations, etc.: Students crowded into the operating theater.
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the theater, dramatic performances as a branch of art; the drama: an actress devoted to the theater.
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Often the theater . dramatic works collectively, as of literature, a nation, or an author: the theater of Ibsen.
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the quality or effectiveness of dramatic performance: good theater; bad theater; pure theater.
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a place of action; field of operations: the Pacific theater of combat during World War II.See also theater of war.
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a natural formation of land rising by steps or gradations.