WordWeb Online

1. Show to be right by providing justification or proof
   "vindicate a claim";
   - justify
    
2. Maintain, uphold, or defend
   "vindicate the rights of the citizens"
    
3. Clear of accusation, blame, suspicion, or doubt with supporting proof
   "You must vindicate yourself and fight this libel"

Derived forms: vindicated, vindicates, vindicating

Type of: acquit, assoil [archaic], clear, defend, discharge, exculpate, exonerate, maintain, uphold