United Kingdom of Great Britain and Northern Ireland /jʊˈnaɪtɪd ˈkɪŋdəm əv ˌɡɹeɪt ˈbɹɪtən ən ˌnɔː(ɹ)ðə(ɹ)n ˈaɪə(ɹ)lənd/ noun1 •Official name of the United Kingdom: a country in Northern Europe.