Definition from Wiktionary, the free dictionary
From Latin vindicātus, perfect passive participle of vindicō (“lay legal claim to something; set free; protect, avenge, punish”), from vim, accusative singular of vīs (“force, power”), + dīcō (“say; declare, state”).
- To clear from an accusation, suspicion or criticism.
- to vindicate someone's honor
- To justify by providing evidence.
- to vindicate a right, claim or title
- 2012 June 19, Phil McNulty, “England 1-0 Ukraine”, BBC Sport:
- The Ukrainians immediately demanded a goal and their claims were vindicated as replays showed the ball crossed the line before Terry's intervention.
- To maintain or defend a cause against opposition.
- to vindicate the rights of labor movement in developing countries
- To provide justification for.
- The violent history of the suspect vindicated the use of force by the police.
- To lay claim to; to assert a right to; to claim.
- (obsolete) To liberate; to set free; to deliver.
- (obsolete) To avenge; to punish
- A war to vindicate infidelity.
Related terms 
to clear from an accusation, suspicion or criticism
to justify by providing evidence
to maintain or defend a cause against opposition
to provide justification
- second-person plural present active imperative of vindicō