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

     

    authentication

     noun
    noun
    BrE BrE//ɔːˌθentɪˈkeɪʃn//
     
    ; NAmE NAmE//ɔːˌθentɪˈkeɪʃn//
     
    [uncountable]
     
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  1. 1the act of proving that something is genuine, real or true When buying jewellery, make sure you get a certificate of authentication.
  2. 2the act of proving that somebody is a particular person User authentication is often performed with passwords.