Definitions
1.nounA date on a document later than the real date on which it was written.
2.verbTo occur after an event or time; to exist later on in time
3.verbTo assign an effective date to a document or action later than the actual date"to postdate a contract, that is, to date it later than the time when it was in fact made"
4.verbTo affix a date to after the event.
5.adjectivePostdated; made or done after the date assigned.