Available Definitions:
1) v. t. - To affirm; to declare with assurance, or plainly and strongly; to state positively; to aver; to asseverate.
2) v. t. - To maintain; to defend.
3) v. t. - To maintain or defend, as a cause or a claim, by words or measures; to vindicate a claim or title to; as, to assert our rights and liberties.