—v., -dat•ed, -dat•ing,
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.
a prior date.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.