Dictionaries

Bilingual Dictionaries | English Language Dictionaries | Technical Dictionaries | Thesauri and Quotations

Bilingual Dictionaries

• ARTFL Project: French-English Dictionary Form
  Look up words in a simple French-English, English-French dictionary containing about 75,000 terms
• Diccionarios.com
  Online Spanish dictionary, Spanish-English, English-Spanish dictionary and more
• German - English On-line Dictionary
  With more than 170,000 entries, searchable in German or in English
• YourDictionary.com
  The most comprehensive and authoritative portal for language and language-related products and services on the web with more than 1800 dictionaries with more than 250 languages. Includes specialty dictionaries including business, computing, law and medicine, grammars, translation products and services, and more

English Language Dictionaries

• OED Online
  The OED Online is the accepted authority on the evolution of the English language. It contains the meaning, history and pronunciation of over half a million words. More about the OED.
• Oxford Dictionary of English
• American Heritage Dictionary of the English Language
  Over 90,000 entries feature 10,000 new words and senses, 70,000 audio word pronunciations, 900 full-page color illustrations, language notes and word-root appendixes
• ARTFL Project: ROGET'S Thesaurus Search Form
  Search the headwords or full text of Roget's Thesaurus
• Cambridge Dictionaries Online
  Comprises Cambridge Learners dictionary, Cambridge International dictionary of English and Cambridge Dictionary of American English
• Canadian Oxford Dictionary
  The dictionary combines coverage of international English with information on English as it is particularly used in Canada
• Dictionary.com
  Includes language dictionaries, a thesaurus, writing resources and a question and answer service for words, grammar and language queries
• Dictionary of Difficult Words
  Search the Hutchinson Dictionary of Difficult Words' A-Z index of over 13,900 difficult words to increase your vocabulary or just find out what those words really mean!
• Encarta World English Dictionary
  An online dictionary with an audio component
• Free Dictionary
  The FreeDictionary.com contains 250,000 English language (including idioms) entries, as well as medical, legal, financial, and computer dictionaries, plus a thesaurus, acronyms dictionary, and encyclopedias
• Merriam-Webster Online
  Dictionary with audio component and a thesaurus
• OneLook Dictionaries
  Offers spell-check for words in English or French with wildcard option and definitions for words in many other languages
• Online Etymology Dictionary
  Dictionary of word origins and usage over time
• Rhyming dictionary
  Enter words to find words that rhyme, definitions, synonyms, homonyms, antonyms and more
• URBANdictionary
  Slang dictionary; contibutions welcome
• YourDictionary.com
  The most comprehensive and authoritative portal for language and language-related products and services on the web with more than 1800 dictionaries with more than 250 languages. Includes specialty dictionaries including business, computing, law and medicine, grammars, translation products and services, and more

Technical Dictionaries

• American Sign Language Dictionary
  Includes a few American Sign Language terms to aid in communication with a person who signs, but does not hear. New word definitions are being added, and this will soon bring the total dictionary number of ASL terms to more than 1270. Also included is the basic alphabet and numbers1-10. This dictionary has both animated and text definitions
• Biographical Dictionary
  Covers more than 28,000 notable men and women who have shaped our world from ancient times to the present day
• Biotech Life Sciences Dictionary
  Most of the 8300+ terms deal with biochemistry, biotechnology, botany, cell biology and genetics. Also includes some terms relating to ecology, limnology, pharmacology, toxicology and medicine
• Brewer's Dictionary of Phrase and Fable
  Comprises over 18,000 entries that reveal the etymologies, trace the origins and otherwise catalog "words with a tale to tell"
• Behind the Name
  Search the etymology, the language of origin and history of first names.
• FOLDOC (Free On-line Dictionary of Computing)
  FOLDOC is a searchable dictionary of acronyms, jargon, programming languages, tools, architecture, operating systems, networking, theory, conventions, standards, mathematics, telecoms, electronics, institutions, companies, projects, products, history, and any other topics related to computing
• Grove Dictionary of Art
  The most comprehensive online reference resource for all aspects of the visual arts, worldwide, from prehistory to the present day
• Symbols.com
  The world's largest online encyclopedia of graphic symbols, SYMBOLS.com contains more than 2,500 Western signs, arranged into 54 groups according to their graphic characteristics
• Duhaime's Law Dictionary
  Canadian law with legal terms explained in plain language
• YourDictionary.com
  See above under bilingual dictionaries

Thesauri and Quotations

• Wordnik Thesaurus
• Bartlett's Familiar Quotations
  A collection of passages, phrases, and proverbs traced to their sources in ancient and modern literature
• Cyber Nation's Quotation Center
  Search for quotations by author, keyword, or subject
• Quoteland
  Includes quotations by topic, by author, literary quotations and quotations for special occasions
• Quotations Home Page
  One of the largest quotations websites with an associated poetry site which is the largest private archive of its kind on the web
• The Quotations Page
  A searchable database of over 20,000 quotations, quotes of the day, motivational quotes, quotes by author, and much more
• Roget's Thesauri
  i) Roget’s II: The New Thesaurus - contains 35,000 synonyms and over 250,000 cross-references in an easy-to-use format, with succinct word definitions and an innovative hyperlinked category index.
  (ii) Roget’s International Thesaurus of English Words and Phrases - a complete book of synonyms and antonyms founded upon and embodying Roget's original work with numerous additions and modernizations
• Thesaurus.com
  An online searchable thesaurus facility
• Visual Thesaurus Online
  Accesses data from WordNet, a publicly available lexical reference system developed by the Cognitive Science Laboratory at Princeton University. This database, inspired by psycholinguistic theories of human lexical memory, contains over 50,000 words and 40,000 phrases collected into more than 70,000 sense meanings.