postdate /ˌpəʊstˈdeɪt/verb 3adjective 1/ˈpəʊstˌdeɪt/ noun 1forms 3 verb3 •To assign an effective date to a document or action later than the actual date.no postdated checks [sign in a retail store]to postdate a contract, that is, to date it later than the time when it was in fact made •To affix a date to after the event. •To occur after an event or time; to exist later on in time.Because these prophecies of Isaiah postdate the fall of Babylon (539 B.C.E), they probably refer to that event. — 2001 adjective1 •(no longer used) Postdated; made or done after the date assigned. postdate /ˈpəʊstˌdeɪt/ noun1 •A date on a document later than the real date on which it was written. formspostdated · postdating · postdates