A collection of 62 online language dictionaries ranging from Afrikaans to Zulu - On-line Dictionaries and Glossaries - Language Sort
http://www.rahul.net/lai/glossaries.html

Biographical Dictionary
http://www.s9.com/biography/

Britannica Online
http://www.eb.com:80/

Dictionary.com
http://www.dictionary.com

Dictionary of Occupational Titles
http://www.wave.net/upg/immigration/dot_index.html

List of Dictionaries
Dictionaries from all over the world.
http://math-www.uni-paderborn.de/HTML/Dictionaries.html

Merriam-Webster OnLine
http://www.m-w.com/home.htm

Multilanguage Dictionary
http://www.facstaff.bucknell.edu/rbeard/diction.html

Newlingo Internet Language Dictionary
Vocabulary from the World Wide Web.
http://www.netlingo.com/

OneLook Dictionaries
http://www.onelook.com/

Synonym Dictionary
http://vancouver-webpages.com/synonyms.html.

Wordsmyth Dictionary and Thesaurus
Contest, words of the week will be found on this site.
http://www.wordsmyth.net/

WWWebster Dictionary
A highly recommended dictionary
http://www.m-w.com/