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8.
rta
A group on AOL that chats by using the "Reply To All" button.
Let's join that random rta, Magnetic!
by fel June 24, 2005
 
9.
rta
RTA stands for regional transportation authority (in Chicago) which is public transportation (pace & metra not CTA) that goes through chicago and other nearby outside areas.
P1: dude take the CTA to Dolton
P2: we need to take the RTA if we're going outside chicago
by dict12 January 01, 2008
 
10.
rta
RTA is the abbreviation for " RECTUM TESTING AREA".
Hey Noug, wanna go rta?
by Hey_noug_u _want_breakfast February 18, 2005