Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The quality or condition of being authentic, trustworthy, or genuine.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The quality of being genuine or not corrupted from the original.
  • n. Truthfulness of origins, attributions, commitments, sincerity, and intentions.
  • n. The quality of being authentic (of established authority).

from the GNU version of the Collaborative International Dictionary of English

  • n. The quality of being authentic or of established authority for truth and correctness.
  • n. Genuineness; the quality of being genuine or not corrupted from the original.

from The Century Dictionary and Cyclopedia

  • n. The quality of being authentic, or entitled to acceptance as authoritative, genuine, true, or correct: as, the authenticity of the Scriptures or of a document; the authenticity of a portrait; the authenticity of a statement.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. undisputed credibility

Etymologies

authentic +‎ -ity (Wiktionary)

Examples

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