Metropolitan may be:

Of or relating to a metropolis or metropolitan area, in the sense of:

• an ecclesiastical 'mother see': Metropolitan archbishop or Metropolitan bishop
• a major city, especially a capital, e.g. in
  • Metropolitan Police of the English metropolis known as Greater London
  • New York, where two major cultural institutions are commonly called 'the Metropolitan': Metropolitan Museum of Art and Metropolitan Opera in New York
• the 'mother country' of an overseas empire, e.g. Metropolitan France (mainland France and Corsica)
• A rapid transit system, in particular:
  • Métro (originally Chemin de Fer Métropolitain) in Paris
  • Metropolitan Railway (now the Metropolitan Line) in London

As or in a name:

• Nash Metropolitan automobile
• Metropolitan, a 1935 movie directed by Richard Boleslawski
• Metropolitan, a 1990 movie directed by Whit Stillman
• Metropolitan band an indie rock group from Washington, D.C.
• Transmetropolitan, a comic book series.
• Metropolitan University, renamed Polytechnic insitutions in the United Kingdom after they were given university status in 1992, e.g Manchester Metropolitan University.