noun fric·tion \ˈfrik-shən\

: the act of rubbing one thing against another

: the force that causes a moving object to slow down when it is touching another object

: disagreement or tension between people or groups of people

Full Definition of FRICTION

a :  the rubbing of one body against another
b :  the force that resists relative motion between two bodies in contact
:  the clashing between two persons or parties of opposed views :  disagreement
:  sound produced by the movement of air through a narrow constriction in the mouth or glottis
fric·tion·less \-ləs\ adjective
fric·tion·less·ly adverb

Examples of FRICTION

  1. the friction of sandpaper on wood
  2. Oil in a car engine reduces friction.
  3. It was difficult to reach an agreement because of the friction between the two sides.

Origin of FRICTION

earlier, therapeutic rubbing of the limbs, from Middle French, from Latin friction-, frictio, from fricare to rub; akin to Latin friare to crumble, and perhaps to Sanskrit bhrīṇanti they injure
First Known Use: 1704

Other Physics Terms

amplitude, centrifugal, centripetal, convection, gradient, hysteresis, kinetic, lase, quantum

Rhymes with FRICTION

FRICTION Defined for Kids


noun fric·tion \ˈfrik-shən\

Definition of FRICTION for Kids

:  the rubbing of one thing against another
:  resistance to motion between bodies in contact <Oiling the parts of the machine reduces friction.>
:  disagreement among persons or groups
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