verb (used with object), val·i·dat·ed, val·i·dat·ing.
- to make valid; substantiate; confirm: Time validated our suspicions.
- to give legal force to; legalize.
- to give official sanction, confirmation, or approval to, as elected officials, election procedures, documents, etc.: to validate a passport.
- to confirm or corroborate
- to give legal force or official confirmation to; declare legally valid
1640s, from Latin validatus, from validus (see valid). Related: Validated; validating.