: a strong bar that is used to lift and move something heavy
: a bar or rod that is used to operate or adjust something on a machine, vehicle, device, etc.
: something used to achieve a desired result
Full Definition of LEVER
a: a bar used for prying or dislodging something
b: an inducing or compelling force :tool<use food as a political lever — Time>
a: a rigid piece that transmits and modifies force or motion when forces are applied at two points and it turns about a third; specifically: a rigid bar used to exert a pressure or sustain a weight at one point of its length by the application of a force at a second and turning at a third on a fulcrum
b: a projecting piece by which a mechanism is operated or adjusted
: a stiff bar for lifting a weight at one point of its length by pressing or pulling at a second point while the bar turns on a support
: a bar or rod used to run or adjust something <a gearshift lever>
Word Root of LEVER
The Latin word levis, meaning “lightweight,” gives us the root lev. Words from the Latin levis have something to do with being light in weight. To levitate is to be so light as to rise up into the air. To elevate is to lift something up to a higher level as if it is lightweight. A lever is a bar used to help lift something up by making it feel lighter than it is.