—v.t. 1. to be of older date than; precede in time: The Peruvian empire antedates the Mexican empire. 2. predate (def. 1).
3. to assign to an earlier date: to antedate a historical event. 4. to cause to return to an earlier time: to antedate one's thoughts by remembering past events. 5. to cause to happen sooner; accelerate: The cold weather antedated their departure from the country. 6. Archaic.to take or have in advance; anticipate.