English term or phrase: Urban agglomerate

Explanation:

urban agglomerate is an extended city or town area comprising the built-up area of a central place (usually a municipality) and any suburbs linked by continuous urban area.It is also known as
Conurbation.

Hindi Translation:

नगरीय/शहरी क्षेत्र का विस्तार क्षेत्र(एक्सटेंशन) या उपनगर