arena : Idioms & Phrases
arena theater
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noun a theater arranged with seats around at least three sides of the stage
theater in the round.
WordNet
political arena
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noun a sphere of intense political activity
political sphere.
WordNet
punta arenas
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noun a city in southern Chile on the Strait of Magellan; the southernmost city in the world
WordNet
sports arena
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noun a building for indoor sports
field house.