look up any word, like dirty sanchez:
 
8.
OA
OverAll. Can be used to describe a measurement; length, width, and height overall.
It measures 7" x 6" x 6 1/2" OA.
by Evilyn January 27, 2006
 
9.
oa
object of avoidence, namely some creepy gross person who likes you
stephan is the new oa..hes totally following sarah everywhere
by couch March 01, 2005
 
10.
OA
The order of the arrow, An Honor society in the Boy Scouts of America.
Hey, are you in the OA?
by He'sTheMan March 16, 2005