Constitution: The Constitution is a written document that outlines the fundamental laws and principles by which a country is governed. In the case of the United States, it serves as the supreme law of the land.
Citizenship: Citizenship refers to being recognized as a member of a particular nation or country and having certain rights and responsibilities within that nation's borders.
Alien: In legal terms, an alien is someone who is not a citizen or national of the country they are residing in.