Is Great Britain and british the same?

No, "Great Britain" and "British" are not the same.

Great Britain is a geographical term referring to the largest island of the United Kingdom, which includes England, Scotland, and Wales.

"British" is a nationality term used to describe someone from the United Kingdom or another British territory, such as the Channel Islands or the Isle of Man. The term "British" can also refer to the culture, history, and traditions of the United Kingdom and its people.

While many British people live in Great Britain, there are also British people who live in other parts of the world, such as the United States, Canada, and Australia. Additionally, there are people from other countries who may have British citizenship or ancestry but do not live in Great Britain.

Therefore, "Great Britain" and "British" are distinct terms with different meanings.