BambooWeb Dictionary Online dictionary and encyclopedia providing articles and information on a wide variety of topics. http://www.bambooweb.com/

Merriam-Webster Dictionary official site includes online versions of the collegiate dictionary and thesaurus. http://www.m-w.com/

OneLook Dictionaries search for multiple definitions of a word from a variety of online dictionaries. http://www.onelook.com/

DICT Development Group Simultaneously search several dictionaries for word definitions including Websters, Jargon File, and other databases. http://www.dict.org/

Dictionary.com features a variety of tools including thesauri, translator, and writing resources. http://www.dictionary.com/

The Free Dictionary provides English, medical, legal, and computer dictionaries as well as a thesaurus, encyclopedia, and literature reference library. http://www.thefreedictionary.com/

LookWAYup dictionary and search tool embedded into the web page. http://www.lookwayup.com/

VoyCabulary makes the words on any webpage into links so you can look them up in a dictionary or other reference site, by simply clicking on the words. http://www.voycabulary.com/

WebRef.org providing glossaries of terms related to various scientific disciplines, aesthetic arts, and biographical information. http://www.webref.org/

Wiktionary collaborative project to produce a free multilingual dictionary in every language, with meanings, etymologies and pronunciations. http://www.wiktionary.org/

Wordsmyth Educational Dictionary-Thesaurus American English dictionary with an integrated thesaurus and other lexical resources. http://www.wordsmyth.net/

Oxford Reference Online Subscription-based service brings together hundreds of well-known dictionaries and reference books into a single cross-searchable web database. http://www.oxfordreference.com/

TechDictionary Computer and technology terms, acronyms, chat abbreviations, filename extensions, and emoticons. http://www.techdictionary.com/

AllDictionaries.com Categorized index of language and subject dictionaries. http://www.alldictionaries.com/

AllWords.com Features two modern English dictionaries, multilingual search, and translation. Also features a guide to language sites on the web and a language discussion forum. http://www.allwords.com/

Cooldictionary.com Free edition of a complete Webster dictionary. Fully crosslinked. http://www.cooldictionary.com/

1000Dictionaries.com Links to online language dictionaries and subject dictionaries. http://www.1000dictionaries.com/

Dictionary Building Software for Reporters Software program for realtime reporters and captioners that lists many diverse vocabulary lists. http://www.dictionaryjumpstart.com/

Dictionary Link A directory of free online language resources such as dictionaries, thesauruses, language translators, and encyclopedias. http://www.dictionarylink.com/

Dictionary of Comprehension A dictionary of comprehension in different languages. http://www.dictionarydictionary.com/