/ Dictionary / Index A assert: Meaning and Definition of Find definitions for: as•sert Pronunciation: (u-sûrt'), [key] — v.t. to state with assurance, confidence, or force; state strongly or positively; affirm; aver: He asserted his innocence of the crime. to maintain or defend (claims, rights, etc.). to state as having existence; affirm; postulate: to assert a first cause as necessary. assert oneself, to insist on one's rights, declare one's views forcefully, etc.: The candidate finally asserted himself about property taxes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: assert (Thesaurus) Asser asserted Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language