What is the meaning of the word "attest"?

Definitions:

  1. to authenticate, affirm to be true, genuine, or correct, as in an official capacity copy to clipboard verb
    • I can attest that this is your signature. copy to clipboard
  2. to establish or verify the usage of copy to clipboard verb
    • This word is not attested until 1993. copy to clipboard
  3. to give testimony in a court of law copy to clipboard verb
    • I attested to what I had seen. copy to clipboard
  4. to provide evidence for copy to clipboard verb
    • I can attest to the quality of that sandwich by showing you this graph of deliciousness. copy to clipboard

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