Wiktionary
million city
n. A city with at least a million inhabitants.
Usage examples of "million city".
The multi-million city became a feature of the moderu world after the Industrial Revolution introduced enormous advances in transportation and communication.
There aren't enough knees in the whole of Britain even today to take and hold a multi-million city the size of Birmingham.
He contacted again the enormous communication centre of the two million city of Terrania while John Marshall, the telepath, turned to leave.