The Oxford English Dictionary (OED) is a comprehensive dictionary of the English language, published by the Oxford University Press. It provides detailed definitions, etymologies, and usage examples for over 600,000 words, covering both current and historical language. The OED is known for its scholarly approach and extensive research, making it a valuable resource for linguists, writers, and anyone interested in the evolution of English. First published in 1884, the OED has undergone numerous updates and revisions to reflect changes in language and usage. It is available in print and online, with the online version offering regular updates and additional features, such as audio pronunciations and advanced search options.