1 definition by Nosredna RM

Top Definition
means "On A Serious Note"
often used in forum threads when someone says something off topic first and then types "OASN:" with something more related to the topic following

can also be used as OMSN(On A More Serious Note), or OSN
my favorite movies are all the ones i stared in, directed, wrote, and produced

OASN: haha, no but really i like mostly anything made by Steven Spielberg or Michael Bay
by Nosredna RM December 22, 2009

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.