Authenticate meaning

ô-thĕntĭ-kāt
(1) To verify (guarantee) the identity of a person or company. To ensure that the individual or organization is really who it says it is. See authentication, digital certificate and CAPTCHA.
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To prove that something, such as a document, is what it purports to be, especially so that the item can be admitted into evidence at a trial or hearing. For example, a party wishing to admit a letter into evidence may ask the witness whether it is, indeed, the letter he received, does he recognize the handwriting, and similar questions.
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To place a mark, such as a signature or a stamp, on a document to signify that it is authentic, effective, or valid.
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To approve or adopt a writing as one’s own.
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To render authentic; to give authority to, by the proof, attestation, or formalities required by law, or sufficient to entitle to credit.
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To prove authentic; to determine as real and true; as, to authenticate a portrait.
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The definition of authenticate is to show or certify that something is not a copy of anything else.

An expert in antique vases who examines a vase to verify that it is not a replicate or fake is an example of an expert that will authenticate the vase.

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To establish the authenticity of; prove genuine.

A specialist who authenticated the antique samovar.

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To make authentic or valid.
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To establish the truth of; verify.
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To prove to be genuine or as represented.
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