verb (used with object), an·te·dat·ed, an·te·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.


  1. a prior date.

verb (ˈæntɪˌdeɪt, ˌæntɪˈdeɪt) (tr)

  1. to be or occur at an earlier date than
  2. to affix a date to (a document, etc) that is earlier than the actual date
  3. to assign a date to (an event, etc) that is earlier than its previously assigned date
  4. to cause to occur sooner

noun (ˈæntɪˌdeɪt)

  1. an earlier date

1580s, earlier as noun meaning “a backdating, false early date attached to a document or event” (1570s); from Latin ante “before” (see ante) + date (v.1). Related: Antedated; antedating.

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