postscript

As a noun postscript

is (countable) an addendum to a letter, added after the author’s signature.

As a verb postscript

is to extend (a letter or another document) with additional remarks.

As an adverb lastly is

(sequence).

As nouns the difference between note and postscript

is that note is while postscript is (countable) an addendum to a letter, added after the author’s signature.

As a verb postscript is

to extend (a letter or another document) with additional remarks.

As a noun postscript

is (countable) an addendum to a letter, added after the author’s signature.

As a verb postscript

is to extend (a letter or another document) with additional remarks.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between postscript and prescript

is that postscript is an addendum to a letter, added after the author’s signature while prescript is something prescribed; a rule, regulation or dictate.

As a verb postscript

is to extend (a letter or another document) with additional remarks.

As an adjective prescript is

directed; prescribed.

As verbs the difference between postscript and added

is that postscript is to extend (a letter or another document) with additional remarks while added is (add).

As a noun postscript

is (countable) an addendum to a letter, added after the author’s signature.

As nouns the difference between amendment and postscript

is that amendment is an alteration or change for the better; correction of a fault or of faults; reformation of life by quitting vices while postscript is (countable) an addendum to a letter, added after the author’s signature.

As a verb postscript is

to extend (a letter or another document) with additional remarks.

As nouns the difference between postscript and epilogue

is that postscript is an addendum to a letter, added after the author’s signature while epilogue is a short speech, spoken directly at the audience at the end of a play.

As a verb postscript

is to extend (a letter or another document) with additional remarks.

As nouns the difference between preface and postscript

is that preface is the beginning or introductory portion that comes before the main text of a document or book while postscript is an addendum to a letter, added after the author’s signature.

As verbs the difference between preface and postscript

is that preface is to introduce or make a comment before (the main point) while postscript is to extend (a letter or another document) with additional remarks.

In countable terms the difference between postscript and pdf

is that postscript is an addition to a story, play, etc while pdf is a document in this format.

As a proper noun PDF is

Parkinson's Disease Foundation

As verbs the difference between append and postscript

is that append is to hang or attach to, as by a string, so that the thing is suspended; as, a seal appended to a record; the inscription was appended to the column while postscript is to extend (a letter or another document) with additional remarks.

As nouns the difference between append and postscript

is that append is (computing) an instance of writing more data to the end of an existing file while postscript is (countable) an addendum to a letter, added after the author’s signature.