Megapolis is a noun that refers to a very large, heavy populated area.

Our word of the day comes from Greek words for ‘very large’ and ‘city.’ In fact, in Ancient Greece there was a city named megalopolis, a word that survives today and is another way of saying megapolis.

Either word may be used to describe a large city or a group of cities that when added together becomes very large.

Example: I had no idea how much of a megapolis the area had become. The population had grown to the point of now having four major sports teams.