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.
Worthless Word for the Day Obscure, abstruse and/or recondite word, especially one not falling into medical terms, foreign monetary units, foreign units of measure, legal terms, or professional jargon of any type.
OneLook Dictionaries Look up a word or term in an Internet dictionary or glossary. Free search access to a frequently updated database of words, terms, names, and acronyms.
Research-It Includes several dictionaries and a thesaurus as well as online tools for shipping and mailing, currency exchange, and language translation.
Cooldictionary.com Free edition of a complete Webster dictionary. Fully crosslinked.
Dictionary Society of North America An international organization of librarians, booksellers, translators, linguists, publishers, writers, journalists, and collectors. Founded in 1975 to further research in dictionary making, study, collection, and use. Member of the American Council of Learned Societies.
High Definition Dictionary Mixed collection of drug terminology with an apparently arbitrarily selected mix of other, unrelated terms. Dictionary accepts contributions of new terms.
The Century Dictionary Online Free 500,000 word dictionary of English with an encyclopedia and world atlas. Uses DjVu and JPEG formats to display page images. Has headword lookup and full text search of 22 million words of underlying text.
Strange Dictionaries Free online versions of the Dictionary of One-Letter Words, the Dictionary of All-Vowel Words, the Dictionary of All-Consonant Words, and other strange dictionary resources.
Free Dictionary and Free Translation Collection of free dictionaries and translation sites. Supports searching all dictionaries with just one mouse click.
Dictionary.com Free online dictionary search, translator, word of the day, crossword puzzles and word games, and vocabulary learning resources for many languages.
yourDictionary.com Comprehensive index of on-line dictionaries in more than 200 different languages. Includes an index of on-line grammars, word of the day by email, and several pages of linguistic fun.
HyperDictionary.com Includes a thesaurus and searchable dictionaries for English, computers, dreams and medicine.
Merriam-Webster OnLine A free, searchable on-line dictionary and thesaurus, word games, a word of the day, and many other English language and vocabulary reference tools and resources.
The Online Dictionary List A large directory of online dictionaries, both in English and bilingual, including specialist dictionaries.
Dictionary Link A directory of free online language resources such as dictionaries, thesauruses, language translators, and encyclopedias.
eLook Dictionary Provides definitions, synonyms, and related words.
Dictionarium Directory of English and foreign-language dictionaries.
Web Dictionaries Multi-search tool by Tinh Van, which consults English-only dictionaries, and Vietnamese into English or French translation dictionaries.
Quotations: The Yale Dictionary Project to create an searchable online database and a quotation dictionary from Yale University Press.
Worthless Word for the Day An obscure, abstruse and/or recondite word is posted on a daily basis. Subscription available.