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English definition of “friction”

friction

noun [U] (FORCE)    /ˈfrɪk.ʃən/
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.Energy, force and powerPower and intensity frictional     /-əl/ adjective Energy, force and powerPower and intensity
(Definition of friction noun (FORCE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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