Definition of amphitheater
1
: an oval or circular building with rising tiers of seats ranged about an open space and used in ancient Rome especially for contests and spectacles
2a
: a very large auditorium
b
: a room with a gallery from which doctors and students may observe surgical operations
c
: a rising gallery in a modern theater
d
: a flat or gently sloping area surrounded by abrupt slopes
3
: a place of public entertainment (as for games or concerts)
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Merriam-Webster unabridged
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Time Traveler for amphitheater
The first known use of amphitheater was in the 14th century
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