urban
1) A word used to describe an area that has a much higher density than the surrounding area; clustered. This could either be the downtown of the central city in a larger metropolitan area (the skyscraper distict) or a clustered villiage/hamlet surrounded by forest\cropland\open desert.  

2) Traditionally, areas where employment came from non-primary sources (secondary and tertiary). However, modern industry tends to take place over an area that has little of the density needed to truly be considered urbanized.

3)Associated with African-American or Hip-Hop culture.

4) Not suburban.
1) Believe it or not, a dense clustered villiage or hamlet surrounded by open countryside is very much in fact, urban.
 An estate, set back from the road on 5 or more acres, a house space or more away from their neighbors near the metropolitan centre, now that's just not urban.   

2)While the economy of our metropolitan area is considered urban, the density of the industrial parks is low enough to render that term laughable. 

3)There is a store in Paducah near Lowertown that sells urbanwear and other aspects of urban or hip-hop culture.

4)Theres nothing sadder than a bunch of people living in low density suburbia calling themselves "urban".