an extensive urban area resulting from the expansion of several cities or towns so that they coalesce but usually retain their separate identities.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
British Dictionary definitions for conurbation
a large densely populated urban sprawl formed by the growth and coalescence of individual towns or cities
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012