Megalopolis vs. Megacity

Megalopolisnoun

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

Megalopolisnoun

A chief city; a metropolis.

Megalopolisnoun

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

Megalopolisnoun

a very large, heavily populated city or urban complex

Megalopolis

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.

Megacitynoun

A very large city; a megalopolis.

Megacity

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 report counted urban agglomerations having over 10 million inhabitants.