friction
noun
fric·tion
ˈfrik-shən 
1
a
: the rubbing of one body against another
the friction of sandpaper on wood
b
: the force that resists relative motion between two bodies in contact
oil in a car engine reduces friction
2
: the clashing between two persons or parties of opposed views : disagreement
friction between neighbors
friction between state and federal authorities
3
: sound produced by the movement of air through a narrow constriction in the mouth or glottis
frictionlessly
adverb
Examples of friction in a Sentence
the friction of sandpaper on wood
Oil in a car engine reduces friction.
It was difficult to reach an agreement because of the friction between the two sides.
Recent Examples on the Web
Regular checkout, after all, risks the frictions and foibles of human interaction.
—
Valerie Trapp, The Atlantic, 4 Dec. 2025
Shooting stars appear when shreds of space debris ranging in size from a grain of sand to a small asteroid collide with Earth while travelling at tens of thousands of miles per hour, only to burn up in a fiery naked-eye display as they're overwhelmed by the friction of atmospheric entry.
—Anthony Wood, Space.com, 4 Dec. 2025
The French president kicked off a 3-day visit to China on Wednesday — his first trip to Beijing in more than two years — on the heels of growing frictions over a range of topics including trade imbalance and the long-running war in Ukraine.
—Anniek Bao, CNBC, 4 Dec. 2025
The result is an extremely stable impulse to the balance throughout the power reserve, and zero friction in the escapement.
—Carol Besler, Robb Report, 2 Dec. 2025
See All Example Sentences for friction
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Cite this Entry
“Friction.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/friction. Accessed 7 Dec. 2025.
Kids Definition
friction
noun
fric·tion
ˈfrik-shən
1
a
: the rubbing of one thing against another
b
: the force that resists motion between bodies in contact
the friction of a box sliding along the floor
lubrication reduces friction
2
: disagreement between persons or groups
3
: sound produced by the movement of air through a narrow constriction in the mouth or glottis
Etymology
Middle English friction "a rubbing of two things together, friction," from early French friction or Latin friction-, frictio (both same meaning), derived from Latin fricare "to rub" — related to fray entry 2
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