Oxford English Dictionary Online (OED)
- Update Frequency: Quarterly
"The Oxford English Dictionary is the accepted authority on the evolution of the English language over the last millennium." The OED gives definitions, etymological analysis, and quotations to demonstrate the use of words in the English language over time.
The web-based version of the OED include all information contained in the print counterpart plus at least 1,000 new and revised entries each quarter.
The publisher, Oxford University Press, provides extensive information about the dictionary and its use on their web side.
Express Link (bookmark): http://www.galileo.usg.edu/express?link=oxrq-ogl1