2. An airport city core and an outlying area of business stretching along transportation corridors.
Also called an aviation city or an airport city. In its purest form, the aerotropolis is an economic hub that extends out from a large airport into a surrounding area which consists mostly of distribution centers, office buildings, light manufacturing firms, convention centers, and hotels, all linked to the airport via roads, expressways (aerolinks), and rail lines (aerotrains). This business-centered version of the aerotropolis is also called an air-commerce cluster or an airport cluster.
Although the plural of metropolis is often rendered as metropolises, the plural of aerotropolis isn't aerotropolises; instead, it is aerotropoli. The difference is probably because more people are now using metropoli as the plural of metropolis, a usage change that dictionaries have not incorporated, yet; although it has been in usage since about 1978.
Etymologically, the problem with the creation of this new word is that the coinage has torn off a piece of metro [tro], "mother" and added it to aero, "air" and then added polis, "city"; making it more complicated than necessary. It would have been better to make the word aeropolis (s), aeropoli (pl), "air city".