Urban area
A city and its surrounding suburbs
Metropolitan area
A city and the surrounding areas that are influenced economically and culturally by the city
Urban sprawl
Areas of poorly planned, low-density development surrounding a city
Edge city
A type of community located on the outskirts of a larger city with commercial centers with office space, retail complexes, and other amenities typical of an urban center
Boomburb
A suburb that has grown rapidly into a large and sprawling city with more than 100,000 residents
Exurb
A typically fast-growing community outside of or on the edge of a metropolitan area where the residents and community are closely connected to the central city and suburbs
Infill
Redevelopment that identifies and develops vacant parcels of land within previously built areas
Rank-size rule
Explanation of size of cities within a country; states the second-largest city will be one-half the size of the largest, the third largest will be one-third the size of the largest, and so on
Primate City
The largest city in a country, which far exceeds the next city in population size and importance
Central place theory
A theory used to describe the spatial relationship between cities and their surrounding communities
Threshold
In central place theory, the number of people needed to support a certain good or service
Range
In central place theory, the distance that someone is willing to travel for a good or service
Megacity
A city with a population of more than 10 million
Metacity
A city with a population of more than 20 million
World city
A city that wields political, cultural, and economic influence on a global scale