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English definition of “lever”

lever

noun [C]    /ˈlev·ər, ˈli·vər/
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 noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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