World English Dictionary
lever (ˈliːvə)
1.  a rigid bar pivoted about a fulcrum, used to transfer a force to a load and usually to provide a mechanical advantage
2.  any of a number of mechanical devices employing this principle
3.  a means of exerting pressure in order to accomplish something; strategic aid
4.  to prise or move (an object) with a lever
[C13: from Old French leveour, from lever to raise, from Latin levāre, from levis light]

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