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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. [Abbrev. P. S.

Origin: L. Postscriptus, (assumed) p. P. Of postscribere to write after; post after _ scribere to write: cf. F. Postscriptum. See Post-, and Scribe.