<p><strong>Verb</strong></p><ul><li>(used with object) to render or declare legally void or inoperative: to nullify a contract</li><li>Synonyms: cancel, void, annul, invalidate</li><li>to deprive (something) of value or effectiveness; make futile or of no consequence</li><li>Synonyms: cancel, void, annul, invalidate</li></ul>