a person who entertains people by doing difficult and skilful physical acts high above the ground, for example on a high wire or a trapeze (= a short bar hanging from two ropes)

The aerialists performed a breathtaking show above our heads. 空中飞人们在我们头顶上作了一场惊险的表演。

The famous aerialist walked from one tower of the building to the other. 这位著名的空中飞人从大楼的一座塔楼走到另一座塔楼。