Post"date` (?), v. t. [imp. & p. p. Postdated; p. pr. & vb. n. Postdating.] [Pref. post- + date.] 1. To date after the real time; as, to postdate a contract, that is, to date it later than the time when it was in fact made.

2. To affix a date to after the event.

Post"date`, a. Made or done after the date assigned.

Of these [predictions] some were postdate; cunningly made after the thing came to pass.

Post"date`, n. A date put to a bill of exchange or other paper, later than that when it was actually made.

• To occur after an event or time; to exist later on in time
  
• To assign an effective date to a document or action later than the actual date