<p><strong>Verb (used with object)</strong></p><ul><li>to be of older date than; precede in time: The Peruvian empire antedates the Mexican empire.</li><li>to assign to an earlier date: to antedate a historical event.</li><li>to cause to return to an earlier time: to antedate one's thoughts by remembering past events.</li><li>to cause to happen sooner; accelerate: The cold weather antedated their departure from the country.</li><li>Archaic: to take or have in advance; anticipate.</li></ul><p><strong>Noun</strong></p><ul><li>a prior date.</li></ul>