A variant spelling of 'amphitheater'—a large oval or round building with rising rows of seats arranged around a central arena.
Alternate spelling of amphitheater, from Greek 'amphi-' (around) + 'theatron' (theater). This spelling variant appears in older English texts and some regional uses.
The Colosseum in Rome is history's most famous amphitheater, and it still stands because Romans engineered those rising stone seats with such precision that water drainage and acoustics work nearly perfectly 2,000 years later—ancient engineering genius.
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