- (大楼的)蓄水箱,水塔;(抽水马桶的)水箱
A cistern is a container which stores the water supply for a building, or that holds the water for flushing a toilet.
in AM, usually use 美国英语通常用 tank
- (贮存雨水的)地下蓄水罐
A cistern is a container for storing rain water.
in BRIT, usually use 英国英语通常用 water butt