Pronunciation: (u-sûrt'),[key] —v.t. 1. to state with assurance, confidence, or force; state strongly or positively; affirm; aver: He asserted his innocence of the crime. 2. to maintain or defend (claims, rights, etc.).
3. to state as having existence; affirm; postulate: to assert a first cause as necessary. 4. assert oneself, to insist on one's rights, declare one's views forcefully, etc.: The candidate finally asserted himself about property taxes.