megacity.

A very large city or urban agglomeration, often classified as containing at least ten million inhabitants.

Use it for

Words that belong together

• a coastal megacity
• megacity growth

On the page

The coastal megacity spread past the last boundary on the map.

Megacity growth joined districts whose residents still called them separate towns.

Usage notes

Primary category: setting. Forms: Singular megacity; plural megacities. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings.