amphitheatre (US -ter)
/ˈæmfɪθɪətə(r); `æmfəˌθiətɚ/ n 1 oval or circular unroofed building with rows of seats rising in steps all round an open space, used for presenting entertainments 圆形剧场, 竞技场（椭圆形或圆形露天建筑物, 四周有阶梯式座位, 中央有表演场地）: Some famous amphitheatres were built by the Romans. 一些着名的竞技场都是罗马人修建的. 2 similar but semi-circular arrangement of seats inside a building used for eg lectures 内有半周阶梯式座位的建筑物（如阶梯教室）. 3 level area surrounded by hills 四周有小山环绕的平地.
