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1.
1) A place to take a pee during a long drive.

2) A place where gay men often hang out have sex.
Alright you're under arrest for having gay sex in the rest area.
by 1069 September 12, 2006
 
2.
A place on the interstate where you can stop an use the restroom and get a soda during long trips. Rest areas often have maps where you can where you are.
I think we need to stop at the next rest area.
by David March 07, 2004