elevator
/ˈelɪveɪtə(r); `ɛləˌvetɚ/ n
1 (US) = lift.
2 one of two movable parts in the tail of an aircraft that are used to make it climb or dive （飞行器的）升降舵.
3 tall storehouse for grain 高大的谷物仓库.
4 machine like a continuous belt with buckets at intervals, used for raising grain, goods, etc 斗式皮带输送机（用於向高处输送粮食、 货物等）.