The Oxford Dictionary of English is considered the leading reference work for the English language. At the forefront of linguistic research, the dictionary focuses on contemporary English. It is based on the latest data from the world's largest language research program, including the two-billion-word Oxford English Corpus. This new edition has added thousands of new words and meanings, as well as up-to-date encyclopedic information and extensive appendices on topics such as countries, heads of state, and chemical elements. New features include Word Trends, which present linguistic research based on the Oxford English Corpus. They provide insight into the remarkable stories behind rapidly changing everyday English words.