verification

Short definition from Wiktionary

Noun

1. 1
   The act or process of verifying.
2. 2
   The state of being verified.
3. 3
   Confirmation; authentication.
4. 4
   A formal phrase used in concluding a plea, to denote confirmation by evidence.
5. 5
   The operation of testing the equation of a problem, to see whether it truly expresses the conditions of the problem.