D defs.my
Entry 1 sense Webster, 1913

Postscript

/pōs'-krĭptˌ/ · Post·script · IPA /ˈpoʊst.skɹɪpt/
01 n. A paragraph added to a letter after it is concluded and signed by the writer; an addition made to a book or composition after the main body…
  1. 1.
    A paragraph added to a letter after it is concluded and signed by the writer; an addition made to a book or composition after the main body of the work has been finished, containing something omitted, or something new occurring to the writer.