United Kingdom is the shortened version of what is the 'United Kingdom of Great Britain and Northern Ireland' which can be further abbreviated to simply the U.K.
The United Kingdom is comprised of four states, in order of size, England the largest, Scotland, Wales and Northern Ireland.
The main language of the U.K. is English, but other languages such as Scottish Gaelic, Welsh and Irish Gaelic are also spoken in more remote parts.
The U.K. is situated in an archapelago of islands off the North Western coast of the European continent. Great Britain (England, Scotland and Wales) being the largest of the islands. The islands surrounding Britain are also a part of the U.K.
"I live in the United Kingdom of Great Britain and Northern Ireland."
"So you are British then?"
1) <verb> To put fins onto an arrow's body to increase it's accuracy. The name "Fletcher" comes from this trade, usually a Fletcher was one who made the entire arrow, not just Fletching.
2) <noun> Usually the nickname of anyone with the name of 'Fletcher.'