The meaning is An additional remark at the end of a letter.
A sentence could be,I was sending my mom a message but i had to tell her about my new college
weel you get a pen and when you write a sentence you put the word POSTSCRIPT in it. its not as hard as you might think
There was a postscript on the letter reminding me that I will need to bring my passport.
the abbreviation of postscript is P.S.
Postscript is abbreviated to 'P.S.'.
Postscript.
I had to add a postscript at the end of my letter letting my dad know that I moved.
The postscript of Aunt Mabel's letter cautioned us to bring our swim suits when we came to visit.
The prefix "post-" means after or following. In the word postscript, it indicates that the script or writing comes after the main body of text.
At the end of my letter for Nina, I had to write a postscript because I forgot to tell her my grandpa-pa died yesterday.
The Spanish language equivalent for the English "postscript" is "posdata;" the abbreviation equivalent to the English "P.S." is, appropriately, "P.D."
A synonym for 'epilogue' is 'conclusion' or 'postscript'.
(as to the introduction to a document) addendum, epilogue, postscript