American English

Definition of friction noun from the Oxford Advanced American Dictionary



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  1. 1[uncountable] the action of one object or surface moving against another Friction between moving parts had caused the engine to overheat.
  2. 2[uncountable] (physics) the resistance (= the force that stops something moving) of one surface to another surface or substance moving over or through it The force of friction slows the spacecraft down as it re-enters the earth's atmosphere.
  3. 3[uncountable, countable] friction (between A and B) disagreement or a lack of friendship among people who have different opinions about something synonym tension conflicts and frictions that have still to be resolved
See the Oxford Advanced Learner's Dictionary entry: friction

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