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English definition of “authenticate”

authenticate

verb [T]     /ɔːˈθentɪkeɪt/ US   /ɑːˈθenṱɪ-/
to prove that something is real, true, or what people say it is: Each of these signatures must be authenticated by a lawyer. Holograms can be used to authenticate documents.
IT to prove that someone is a particular person: A password is used to authenticate a user. We offer electronic certificates that authenticate the identity of internet traders.
authentication /ɔːˌθentɪˈkeɪʃən/ US   /ɑːˌθenṱɪ-/ noun [U]
(Definition of authenticate verb from the Cambridge Business English Dictionary © Cambridge University Press)
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