Republic

noun

1. A state where sovereignty rests with the people or their representatives, rather than with a monarch or emperor; a country with no monarchy.

   "The United States is a republic; the United Kingdom of Great Britain and Northern Ireland is a constitutional monarchy."

2. A state, which may or may not be a monarchy, in which the executive and legislative branches of government are separate.
3. One of the subdivisions constituting Russia. See oblast.

   "The Republic of Udmurtia is west of the Permian Oblast."