Webster's Revised Unabridged Dictionary · 1913

Vindicate

Vindicate , transitive verb

[Latin vindicatus, past participle of vindicare to lay claim to, defend, avenge. See Vengeance.]

1.
To lay claim to; to assert a right to; to claim. [Rare]
Is thine alone the seed that strews the plain? The birds of heaven shall vindicate their grain. — Pope
2.
To maintain or defend with success; to prove to be valid; to assert convincingly; to sustain against assault; as, to vindicate a right, claim, or title.
3.
To support or maintain as true or correct, against denial, censure, or objections; to defend; to justify.
When the respondent denies any proposition, the opponent must directly vindicate... that proposition. — I. Watts
Laugh where we must, be candid where we can, But vindicate the ways of God to man. — Pope
4.
To maintain, as a law or a cause, by overthrowing enemies. — Milton
5.
To liberate; to set free; to deliver. [Obsolete]
I am confident he deserves much more That vindicates his country from a tyrant Than he that saves a citizen. — Massinger
6.
To avenge; to punish; as, a war to vindicate or punish infidelity. [Obsolete] — Bacon
God is more powerful to exact subjection and to vindicate rebellion. — Bp. Pearson