postscript /ˈpoʊst.skɹɪpt/noun 2verb 1forms 3 noun2 •An addendum to a letter, added after the author's signature.As a rule Julian dictated to secretaries, and so fast that Libanius says the "tachygraphers" were unable to keep pace with him, but certain postscripts are marked "with his own hand." — 1913 •An addition to a story, play, etc. after its completion.In a moving post-script to the novel, Forster tells the reader that the book was inspired by a visit to the home of Edward Carpenter. — 1974 verb1 •To extend (a letter or another document) with additional remarks. formspostscripted · postscripting · postscripts