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

     

    duplication

     noun
    noun
    BrE BrE//ˌdjuːplɪˈkeɪʃn//
     
    ; NAmE NAmE//ˌduːplɪˈkeɪʃn//
     
    [uncountable, countable]
     
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  1. 1the act or process of making an exact copy of something a studio equipped with the latest duplication equipment
  2. 2the act or process of doing something again, especially when it is unnecessary a wasteful duplication of effort