What does the greek word polis mean?

city-state
Polis literally means 'city ' in Greek and indicated Greek City States. For example Astropolis now may mean a complex space station, Cosmopolis is a large urban center, Necropolis, city of the dead or a cemetery. Some cities carry the Word 'polis' in their name as in Annapolis in the USA, Biopolis in Singapore, Indianapolis in the USA and Sophia-Antipolis in France

police