Urban area
An urban area, also known as a built-up area or urban agglomeration, is a human settlement with a high population density and an infrastructure of built environment. Urban areas originate through urbanization, and researchers categorize them as cities, towns, conurbations or suburbs. In urbanism, the term "urban area" contrasts to rural areas such as villages and hamlets. In urban sociology or urban anthropology, it often contrasts with natural environment.
Read on Wikipedia