Commonwealth (noun)

1. A nation, state, or other political entity founded on the principles of democracy and personal liberty.
2. A group of people united by a common interest or goal.

Origin:

From the old english word "gemǣne weal" meaning "common well-being".

Examples:

1. The United States of America is a commonwealth founded on the principles of democracy and personal liberty.
2. The Commonwealth of Kentucky is a state located in the Southern United States.
3. The Commonwealth of Independent States (CIS) is an organization of former Soviet Republics.
4. The Commonwealth of Australia is a federal parliamentary constitutional monarchy.
5. The British Commonwealth is a voluntary association of 54 independent sovereign states.