Meaning

  1. (countable, uncountable) Something which validates or confirms the authenticity of something; or the process of doing so.
  2. (countable, uncountable) Proof of identity required by a user to log on to some network or access some resource.
  3. (countable, uncountable) A hallmark or assay-mark on a piece of metalwork.

Frequency

42k
Etymology

From authenticate + -ation.

Notes

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