Definition of coefficient noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˌkəʊɪˈfɪʃnt//
    ; NAmE NAmE//ˌkoʊɪˈfɪʃnt//
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  1. 1 (mathematics) a number which is placed before another quantity and which multiplies it, for example 3 in the quantity 3x
  2. 2 (physics) a number that measures a particular property (= characteristic) of a substance the coefficient of friction
  3. Word Originmid 17th cent. (in the sense ‘cooperating to produce a result’): from modern Latin coefficient-, from com- ‘together’ + efficient- ‘accomplishing’.
See the Oxford Advanced American Dictionary entry: coefficient