1. Make valid or confirm the validity of
   "validate a ticket"
    
2. Declare or make legally valid
   "The court validated the contract";
   - formalize, formalise [Brit]
    
3. Prove valid; show or confirm the validity of something
   "The results validated our initial assumptions"
    
4. Give evidence for
   "The new findings validated the researcher's hypothesis";
   - corroborate

Derived forms: validated, validates, validating

Type of: affirm, alter, authorise [Brit], authorize, change, clear, confirm, corroborate, modify, pass, reassert, substantiate, support, sustain

Antonym: invalidate

Encyclopedia: Validate