Boyd’s Bible Dictionary:
(sight). A place where dramatic performances are exhibited (Acts 19:29); but the spectacle or performance itself (1 Cor. 4:9). The introduction of the theater by Herod the Great greatly offended the Jews.
Strong’s Dictionary of Greek Words:
Transliteration:
theatron
Meaning:
from 2300; a place for public show ("theatre"), i.e. general audience-room; by implication, a show itself (figuratively)
KJV Usage:
spectacle, theatre