megacities
/ˈmɛɡəˌsɪtiz/
noun
- Very large cities, typically with a population of more than 10 million people.
- Tokyo, Delhi, and Shanghai are some of the world's most famous megacities.
- The number of megacities around the globe has grown rapidly in the last fifty years.
- Megacities often face challenges like traffic congestion and pollution.
Synonyms