n. Abbr. Pre.S.
An important message appended at the beginning of an e-mail or letter before the writer's message.
From: Bradley Thomas
To: Cooper, Ashley
Sent: Sun Aug 19 14:07:34 2007
Pre.S. I stayed up til 7am so I thought calling was less work than emailing, but you're not picking up.
Are we going to the park or to the movies? You decide. Do you want to get brunch as well?
Sent from my BlackBerry® wireless device