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lever

 
/ˈlev·ər/, /ˈli·vər/ n [C]

Definition

a handle that you move to control the operation of a machine: He pushed the lever into the "on" position and started the machine. physics A lever is also a bar, moving over a fixed point, that when pressed down at one end can move or lift something at the other end.
(Definition of lever n from the Cambridge Academic Content Dictionary © Cambridge University Press)

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