amphitheatre
(US -ter), 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. 一些著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.