Area of a city where retail and office activities are clustered

A theory that explains the distribution of services, since settlements serve as centers of market areas for services; larger settlements are fewer and farther apart than smaller settlements and provide services for a larger number of people who are willing to travel farther

An increase in the percentage of and the number of people living in urban settlements.

Clusters of large buildings away from the central business district

the restoration of run-down urban areas by the middle class (resulting in the displacement of lower-income people)

A city which is greater than two times the next largest city in a nation (or contains over one-third of a nation's population) and usually very expressive of the national culture and often the capital city.

A pattern of settlements in a country such as the Nth largest settlement is 1/n the population of the largest settlements.

A process by which financial institutions refuse to lend money to people to purchase or improve property within certain boundaries.

Development of new housing sites at relatively low density and at locations not contiguous to the existing built-up area

Development that meets the needs of the present without compromising the ability of future generations to meet their own needs.

Area with a city of 50 thousand or more people, together with adjacent urban communities that have strong ties to the central city

A central city and its surrounding built-up areas.

A law that limits the permitted uses of land and maximum density of development in a community.

A mini edge city that is connected to another city by beltways or

highways.

A model of the internal structure of cities in which social groups are arranged around a series of sectors, or wedges, radiating out from the CBD.

Spatial generalization of the large, late-twentieth-century city in the United States. It is shown to be a widely dispersed, multicentered metropolis consisting of increasingly independent zones or realms, each focused on its own suburban downtown; the only exception is the shrunken central realm, which is focused on the Central Business District (CBD).

In the United States, an urban area with at least 50,000 inhabitants.  

Includes a thriving CBD with a commercial spine. The quality of houses decreases as one moves outward away from the CBD, and the areas of worse housing occurs in the outlying sectors.

.  In the United States, an urban area with between 2,500 and 50,000 inhabitants