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val·i·date

validate

pronunciation:
vae lih deIt
part of speech: transitive verb
inflections: validated, validates, validating
definition 1: to prove valid or acceptable; verify.
She validated the reports with direct evidence.He cited studies to validate his theory.
synonyms:
authenticate, confirm, establish, substantiate, verify
antonyms:
disprove, invalidate, negate
similar words:
back, certify, circumstantiate, corroborate, fortify, legitimize, prove, support, sustain, vindicate
definition 2: to make valid by legal means.
Your signatures are needed to validate the contract.
synonyms:
confirm, ratify
antonyms:
quash, revoke, void
similar words:
authorize, certify, formalize, legalize, license, sanction
derivation: validation (n.)