PS meaning is postscript, it has been derived from Latin Post Scriptum. It is generally used in a letter.
So what does PS mean in a letter?
When you need to add something in a letter after you have already put your signatures or you need to make some corrections in already signed letter, you use PS.
How you use PS in a letter?
Using ps in a letter is pretty simple. It is written in the second half of the letter in a place after your signatures.
Example: Let us say you are writing a letter as follows
kindly grant me a leave for today.
PS: I am ill so I can not attend the office today.
This is how PS is used in a letter. Hope it is clear now that what does PS mean? Share with us in following comments.