the means by which the presence, quality, or genuineness of anything is determined; a means of trial.
Definition: 2
the trial of the quality of something: to put to the test.
Definition: 3
a particular process or method for trying or assessing.
Definition: 4
a set of questions, problems, or the like, used as a means of evaluating the abilities, aptitudes, skills, or performance of an individual or group; examination.
Definition: 5
Psychology. a set of standardized questions, problems, or tasks designed to elicit responses for use in measuring the traits, capacities, or achievements of an individual.