validation

UK: /ˌvælɪˈdeɪʃ^ən/ US: /ˌvælɪˈdeɪʃən/

WordReference Random House Learner's Dictionary of American English © 2025

val•i•date /ˈvælɪˌdeɪt/   v. [~ + object] , -dat•ed, -dat•ing. 

1. to make valid; substantiate;
   confirm.
2. to give official permission, confirmation, or approval to:
   to validate a passport.

val•i•da•tion /ˌvælɪˈdeɪʃən/  n. [uncountable] See -val-.

WordReference Random House Unabridged Dictionary of American English © 2025

val•i•date  (val′i dāt′), v.t., -dat•ed, -dat•ing. 

1. to make valid; substantiate;
   confirm:
   Time validated our suspicions.
2. to give legal force to;
   legalize.
3. to give official sanction, confirmation, or approval to, as elected officials, election procedures, documents, etc.:
   to validate a passport.

• Medieval Latin validātus (past participle of validāre to make valid), equivalent. to valid- (see valid) + -ātus -ate¹
• 1640–50

val′i•da′tion, n. 
val′i•da′tor, n. 
val•i•da•to•ry  (val′i də tôr′ē, -tōr′ē), adj.  Synonyms

• 1. authenticate, verify, prove.

Antonyms

• 1. disprove.