The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the north-western coast of the continental mainland.
It comprises England, Scotland, Wales, and Northern Ireland.
The official name for the kingdom comprising Great Britain (England, Scotland, and Wales) and Northern Ireland.
The United Kingdom of Great Britain and Northern Ireland is so named because it is a union of four countries: England, Scotland, Wales, and Northern Ireland.
The term "Great Britain" refers to the island that comprises England, Scotland, and Wales, while "Northern Ireland" is located on the island of Ireland.