The meaning of ASSERT is to state or declare positively and often forcefully or aggressively. How to use assert in a sentence. Synonym Discussion of Assert.

ASSERT definition: to state with assurance, confidence, or force; state strongly or positively; affirm; aver. See examples of assert used in a sentence.

ASSERT definition: 1. to behave in a way that expresses your confidence, importance, or power and earns you respect…. Learn more.

If you assert your right or claim to something, you insist that you have the right to it. The republics began asserting their right to govern themselves.

Definition of assert verb in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

To state or express positively; affirm: asserted his innocence. 2. To defend or maintain (one's rights, for example). 3. To put into action boldly; employ or demonstrate: asserted her independence. To act …

to make a claim to: Minorities are now asserting their right to be heard. Idioms assert oneself, to claim one's rights or declare one's views firmly. aver: He asserted his innocence of the crime. to maintain …

Feb 21, 2026 · assert (third-person singular simple present asserts, present participle asserting, simple past and past participle asserted) To declare with assurance or plainly and strongly; to state positively.

Assert definition: To state or express positively; affirm.

To confidently and firmly state or declare something, often with the aim of expressing a belief, opinion, claim, or fact. "He tried to assert his authority, but no one listened to him."