validation

The act of giving validity; a strengthening, inforcement, or confirming; an establishing or ratifying. Blount, Glossographia (1670).

The act of giving validity.

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.

the act of validating; finding or testing the truth of something

the cognitive process of establishing a valid proof