Based on the authority of the Oxford English Corpus and the ongoing research of Oxford Dictionaries, this revised edition of the Concise Oxford English Dictionary, 11th edition contains over 240 000 words, phrases, and definitions, and provides the most authoritative description of the English language. It offers rich vocabulary coverage, with full treatment of World English, rare, historical, and archaic terms, as well as scientific and technical vocabulary. This revised edition includes hundreds of new and up-to-date words, such as sudoku, agroterrorism, and bird flu, with a special focus on words and phrases used in business English eg. helicopter view, knowledge economy, and vulture fund.