Definition: αρχαίος - ancient, and απαγόρευση - ban/blocking/obstacle.
The total meaning is old/ancient ban.
"This dictionary is urban. That's why it is called "Urban Dictionary". It is banned by the government and it has been banned for a long time, so therefore it is an old ban."
Adj. A lazy simplified word to characterize people who live in city dwellings. Usually used by non people of color in the 90s. Rarely used by non whites. A word that can be seen as less then and pejorative.
CEO: "Hey bro this urban food is delicious."
Friend: "Urban?"
CEO: "Yeah, why?
Friend: "Dude, no one uses that word and this is Subway btw****Eyeroll and sigh****
kenny: hey lee, you know how to pick a lock right?
lee: no! why would you say that?
kenny: well- you're... you know... urban?
lee: you are not saying what i think you're sayin'!
kenny: jesus man- i'm from florida! crazy shit just comes out of my mouth sometimes.