From Longman Dictionary of Contemporary EnglishRelated topics: Geographycommuter beltcomˈmuter ˌbelt noun [countable] British EnglishSGan area around a large city, from which many people travel to work every dayExamples from the Corpuscommuter belt• Then another train towards the Kent commuter belt, and Dartford.• But of course they did not circulatebeyond the commuter belt, so they failed to qualify as nationals on that ground.