amphitheater
US /ˈæm.fəˌθiː.ə.t̬ɚ/
UK /ˈæm.fəˌθiː.ə.t̬ɚ/
1.
an oval or circular building with rising tiers of seats around an open arena, used in ancient Rome for gladiatorial contests and spectacles.
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The ancient Roman amphitheater could hold thousands of spectators.
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We visited the ruins of a grand amphitheater during our trip to Italy.
2.
a sloping, semicircular, or horseshoe-shaped area of ground, especially one with a natural acoustic quality.
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The natural amphitheater provided excellent acoustics for the outdoor concert.
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The hikers rested in a small, secluded amphitheater formed by the surrounding hills.