The foremost single volume authority on the English language, the Oxford Dictionary of English is at the forefront of language research, focusing on English as it is used today. It is informed by the most up-to-date evidence from the largest language research programme in the world, including the two-billion-word Oxford English Corpus. This new edition includes thousands of brand-new words and senses, as well as up-to-date encyclopedic information, and extensive appendices covering topics such as countries, heads of state, and chemical elements. New features include Word Trends which showcase language research based on the Oxford English Corpus and illuminate the extraordinary stories behind fast-changing words of everyday English.