VALIDATION
validation, proof, substantiation
(noun) the act of validating; finding or testing the truth of something
establishment, validation
(noun) the cognitive process of establishing a valid proof
Source: WordNet® 3.1
Etymology
Noun
validation (countable and uncountable, plural validations)
The act of validating something.
Something, such as a certificate, that validates something; attestation, authentication, confirmation, proof or verification.
The process whereby others confirm the validity of one's emotions.
(US) The process of identifying a new prisoner's gang affiliation.
Source: Wiktionary
Val`i*da"tion, n. Etym: [Cf. F. validation.]
Definition: The act of giving validity. [R.] Knowles.
Source: Webster’s Unabridged Dictionary 1913 Edition