Oxford English Dictionary (OED)
For more than a century, the undisputed authority on the English language. Includes 300,000 entries and 59 million words.
![[Title page: A Compendious Dictionary for the English Language, by Noah Webster, 1806]](http://cdn.loc.gov/service/pnp/cph/3a50000/3a51000/3a51900/3a51924r.jpg)
