The Oxford English Dictionary (OED) is the definitive English language dictionary. Used by scholars and researchers around the world, it is the most comprehensive and authoritative dictionary available. Its most unique feature is its inclusion of the first known use of words, their etymologies, and changes in meaning throughout history. The OED is continually updated to include new words, updated definitions, and new research findings.
Although some definitions might be accessible for free, the full OED is not available without paid access.
