Oxford English Dictionary

Description:
The Oxford English Dictionary (OED) is an authority when it comes to the English language. As a historical dictionary, OED is a guide to the meaning, history, and pronounciation of 600,000 words past and present from across the English speaking world. OED also includes access to the history of individual words, and traces the usage of words through 3 million quotations from a wide range of international English language sources.

Dates:
Current (updated every three months)