Definition of Sri Lanka from the Oxford Advanced Learner's Dictionary

an island off the southern tip of India. Its capital city is Colombo and its official language is Sinhalese. When it was part of the British Empire (1802-1948) it was called Ceylon. It is a member of the Commonwealth and one of the world's most important tea producers. In Britain, many people still refer to Ceylon tea. See related entries: Countries and continents
See the Oxford Advanced American Dictionary entry: Sri Lanka