urban center(n = noun.location) city, metropolis - a large and densely populated urban area; may include several independent administrative districts; "Ancient Troy was a great city"
is a kind of municipality
has parts: concrete jungle, central city, city center, city centre, financial center, civic center, down town, municipal center, inner city, medical center
has particulars: national capital, provincial capital, state capital

army high performance computing research center, auditory center, broca's center, burn center, call center, casualty care research center, center, center bit, center field, center fielder, center for disease control and prevention, center line, center of attention, center of buoyancy, center of curvature, center of flotation, center of gravity, center of immersion, center of mass, center on, center punch, center seal, center spread, center stage, city center, civic center, community center, conference center, control center, counterterrorist center, day care center, dead center, defense technical information center, department of housing and urban development, entertainment center, federal law enforcement training center, financial center, housing and urban development, medical center, municipal center, national climatic data center, naval air warfare center weapons division, naval surface warfare center, naval underwater warfare center, nerve center, nonproliferation center, placement center, research center, respiratory center, secretary of housing and urban development, shopping center, storm center, student center, transshipment center, urban, urban area, urban guerrilla, urban ii, urban legend, urban planning, urban renewal, urban sprawl, urban typhus, urban v, urban vi, urban viii, wernicke's center, world trade center