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English definition of “friction”

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friction

noun [U] uk   /ˈfrɪk.ʃən/ us  

friction noun [U] (FORCE)

the force that makes it difficult for one object to slide along the surface of another or to move through a liquid or gas: When you rub your hands together the friction produces heat.

friction noun [U] (DISAGREEMENT)

disagreement or unfriendliness caused by people having different opinions: There's a lot of friction between my wife and my mother. Politics is a source of considerable friction in our family. Border clashes have led to increased friction between the two countries.
frictional
adjective uk   /-əl/ us  
(Definition of friction from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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