巨きょ大だい都と市し

noun

megalopolis; megacity; supercity

Refers to an extremely large urban area, often a conurbation or a city with a population over 10 million. Used in urban planning and geography contexts.

• 東とう京きょうは世せ界かい有ゆう数すうの巨きょ大だい都と市しです。

  Tokyo is one of the world's leading megacities.

• 巨きょ大だい都と市しでは交こう通つう渋じゅう滞たいが深しん刻こくな問もん題だいだ。

  Traffic congestion is a serious problem in megacities.