A large oval or circular building with a central arena surrounded by tiers of seats, used for public performances or events.
From Greek amphi- (around) + theatron (place of viewing). British English spelling; American variant is 'amphitheater.'
Shakespeare's Globe Theatre was built in the amphitheater style, and audiences still find those spaces magical—there's something about being surrounded by other humans watching the same action that creates an intensity no movie theater can match.
Complete word intelligence in one call. Free tier — 50 lookups/day.