What does sorry mean ?

What does sorry mean ?
its only just a word
it never really erases the pain
that thanks to you occurred

it doesn't make it all better
doesn't suddenly make it OK
because really all sorry is
a word you feel you should say

doesn't forgive whats been done
it didn't stop you sit and cry
it doesn't make me feel any better
no matter how hard you might try

sorry is really all there is
to try sort out the past
when really its only a word
which meaning doesn't always last

sick of hearing sorry
its all i ever you ever say
no matter how much you apologize
it doesn't make it OK