Meaning of “authenticity” in the English Dictionary

british dictionary

"authenticity" in British English

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(Definition of “authenticity” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"authenticity" in Business English

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authenticitynoun [ U ]

uk /ˌɔːθenˈtɪsəti/ us

the quality of being real or true:

Many people now question the authenticity of his claims.
ensure/guarantee sth's authenticity Digital signatures ensure the authenticity of your documents.
check/verify sth's authenticity They showed the documents to several experts to verify their authenticity.

(Definition of “authenticity” from the Cambridge Business English Dictionary © Cambridge University Press)