The UK's short name is UK.
The abbreviation "UK" stands for United Kingdom. It is commonly used in various contexts, including news articles, official documents, and everyday conversations, as a shorter and more convenient way to refer to the United Kingdom of Great Britain and Northern Ireland. You can use "UK" as an adjective, for example, "UK exports." While "Briton" refers to a native or inhabitant of Britain, it is more formal and less frequently used than "UK" as a short form.
