city state
noun [ C ] uk/ˌsɪt.i ˈsteɪt/ us/ˌsɪt̬.i ˈsteɪt/
（古代的）城邦
in the ancient world, a city and the area around it with an independent government
Rome and Athens were some of the great city states of the ancient world. 罗马和雅典都是古代强大的城邦。