Definition of authenticate verb from the Oxford Advanced American Dictionary

 

authenticate

 verb
verb
NAmE//ɔˈθɛntɪˌkeɪt//
 
Verb Forms present simple I / you / we / they authenticate
 
he / she / it authenticates
 
past simple authenticated
 
-ing form authenticating
 
 
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to prove that something is genuine, real, or true authenticate something The letter has been authenticated by handwriting experts. authenticate something as something Experts have authenticated the writing as that of Byron himself.
authentication
 
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NAmE//ɔˌθɛntɪˈkeɪʃn//
 
noun [uncountable]
See the Oxford Advanced Learner's Dictionary entry: authenticate