Megalopolis vs. Megacity — What's the Difference?

A megalopolis (), sometimes called a megapolis; also megaregion, city cluster or supercity, is a group of two or more roughly adjacent metropolitan areas, which may be somewhat separated or may merge into a continuous urban region. The megalopolis concept has become highly influential as it introduced a new, larger scale in thinking about urban patterns and urban growth.

A megacity is a very large city, typically with a population of more than 10 million people. Precise definitions vary: the United Nations Department of Economic and Social Affairs in its 2018 "World Urbanization Prospects" report counted urban agglomerations having over 10 million inhabitants.

A very large, heavily populated city or urban complex

A very large city; a megalopolis.

A very large city.

A region made up of several large cities and their surrounding areas in sufficient proximity to be considered a single urban complex.

A large conurbation, where two or more large cities have sprawled outward to meet, forming something larger than a metropolis; a megacity.

A chief city; a metropolis.

A very large urban complex (usually involving several cities and towns)