sovereign

noun | \ ˈsä-vrən, ˈsə-, -və-rən \ | sov·er·eign

1. : a person or political entity (as a nation or state) possessing or held to possess sovereignty the doctrine that a sovereign could not be sued without its consent was universal in the States when the Constitution was drafted —Alden v. Maine, 527 U.S. 706 (1999) — see also sovereign immunity at immunity

adjective

1. : having supreme power a sovereign ruler

2. : enjoying autonomy sovereign states

3. : relating to, characteristic of, or befitting a sovereign