Meaning

noun the act of vindicating or defending against criticism or censure etc.

noun the justification for some act or belief

originFrom Late Middle English vendicacion, vyndicacion, vyndycacion (“assertion of a claim”), from Old French vindication (“revenge, vengeance”) (modern dialectal French vindication), or from Medieval Latin vendicātio, both from Latin vindicātiō (“avenging; defence, protection, vindication; punishment; etc.”), from vindicō (“to avenge; to take revenge on; to protect from; etc.”) + -tiō (suffix forming…

Etymology from Wiktionary, CC BY-SA 3.0