An URBAN area is a densely populated area, typically characterized by high-rise buildings, commercial and industrial centers, and a large population. A BLOCK is a small area of land, usually surrounded by streets, that forms part of a larger URBAN area. An urb is a shortened form of the word 'URBAN', referring to an URBAN area. A MUNICIPALITY is a local government unit, typically consisting of a CITY or TOWN and its surrounding area. A TOWN is a small URBAN area, typically with a population of less than 100, 000 people. A METROPOLIS is a large URBAN area, typically with a population of more than one million people. A CITY is a large URBAN area, typically with a population of more than 100, 000 people. An innercity is an URBAN area located in the center of a larger CITY. An asphalt jungle is a slang term for a large, densely populated URBAN area.