am ‧ phi ‧ thea ‧ tre BrE AmE British English , amphitheater American English /ˈæmfəˌθɪətə, ˈæmfɪˌθɪətə $ -ər/ noun [countable]
[ Date: 1300-1400 ; Language: Latin ; Origin: amphitheatrum , from Greek , from amphi- ( ⇨ ↑ amphibious ) + theatron ( , ↑ theater ) ]
a large circular building without a roof and with many rows of seats