Country
A country is a part of the land on Earth which has come together under one government, and that no other government can control. Some countries mostly have one group of people living in them; other countries are made of many different peoples who share one government; still other countries have many peoples who have moved to that country at different times.
Most of the land on Earth is located in one country or another. The United States, China, and India are all countries.
Click on this link for a list of countries.