Polity (noun)

A political organization or system, especially a state or society; the form of government in a state or country.

Origin:

Late 16th century: from french politie or latin politia, from greek politeia "citizenship, state".

Examples:

1. The country was ruled by a democratic polity.
2. The polity was an autocracy.
3. The polity is a federal system of government.
4. The polity's political system was based on a constitution.
5. The polity was a constitutional monarchy.