The following outline is provided as an overview of and topical guide to Ireland: Ireland (Irish: Éire) is a sovereign island nation located in Northern Europe. The modern Irish state occupies five-sixths of the island of Ireland, which was partitioned in 1921. It is bordered by Northern Ireland (part of the United Kingdom) to the north, by the Atlantic Ocean to the west and by the Irish Sea to the east. According to the Constitution of Ireland, "Ireland" is the official English language name of the state. In 1949, the term "Republic of Ireland" was adopted as an English language description of the State.