A rigorous test or appraisal of the quality or worth of something.
In the 1960s, a party based around the use and advocacy of the psychedelic drug LSD ("acid").
The act of verifying.
The state of being verified.
Confirmation; authentication.
A formal phrase used in concluding a plea, to denote confirmation by evidence.
The operation of testing the equation of a problem, to see whether it truly expresses the conditions of the problem.