Also see definition of "Theatre" in Word Study
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Theatre
Theatre [EBD]
only mentioned in Acts 19:29, 31. The ruins of this theatre at Ephesus still exist, and they show that it was a magnificent structure, capable of accommodating some 56,700 persons. It was the largest structure of the kind that ever existed. Theatres, as places of amusement, were unknown to the Jews.
THEATRE [SMITH]
For the explanation of the biblical allusions, two or three points only require notice. The Greek term, like the corresponding English term, denotes the place where dramatic performances are exhibited, and also the scene itself or spectacle which is witnessed there. It occurs in the first or local sense in (Acts 19:29) The other sense of the term "theatre" occurs in (1 Corinthians 4:9)Also see definition of "Theatre" in Word Study