noun /juːˌnaɪ.tɪd ˈkɪŋ.dəm,jʊˌnaɪ.tɪd ˈkɪŋ.dəm/
A kingdom and sovereign state in Europe comprising of the four countries of England, Scotland and Wales in the island of Great Britain, and Northern Ireland in the island of Ireland. Official name: United Kingdom of Great Britain and Northern Ireland. Abbreviation: UK.
Wikipedia foundation.