(n)an absent part, especially in a book or other piece of writing.
LOL :D .It's a Sarcasm. You never understood till now. :D :D.Some people do mean it. It depend how good and close that person is from you.And how much faith s/he has in you.
I wrote this comment in the hope that this statements are not sarcastic and people mean it when they say it....
Words are all that this blog is made of ~ From me to you, And words are all that I crave for ~From you to me!