authenticity

UK /ɑθɛnˈtɪsɪti/ US /ɑθɛnˈtɪsɪti/
noun 2

Definitions

noun

1

The quality of being genuine or not corrupted from the original, of having the same origin (or attribution, commitment, intention, etc.) as claimed.

I hereby certify the authenticity of this copy.

The authenticity of this painting is questionable.

2

The quality of being authentic (of established authority).

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