Vindicate

1. v. t. To avenge; to punish; as, a war to vindicate or punish infidelity.
2. v. t. To lay claim to; to assert a right to; to claim.
3. v. t. 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.
4. v. t. To support or maintain as true or correct, against denial, censure, or objections; to defend; to justify.
5. v. t. To maintain, as a law or a cause, by overthrowing enemies.
6. v. t. To liberate; to set free; to deliver.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.