Dictionaries

• English Language Dictionaries
  • American Heritage Dictionary of the English Language
  • BuzzWhack (for currently popular terms and buzzwords)
  • The Concise Oxford Dictionary (Oxford University Press)
  • A Dictionary of Slang
  • Dictionary.com
  • Merriam-Webster OnLine
  • The Oxford American Dictionary of Current English (Oxford University Press)
  • Oxford English Dictionary (2nd ed.) (historical background of words)
• Acronyms and Abbreviations Dictionaries
  • Acronym Database
  • Acronym Finder
  • E-mail & Online Chat Acronyms (dictionaries of acronyms used on the Internet)
  • Netlingo (dictionaries of acronyms used on the Internet)
  • The Oxford Dictionary of Abbreviations (Oxford University Press)
• Collections
  • Dictionaries and Language Resources (searches multiple dictionaries at once)
  • Onelook Dictionaries, The Faster Finder (searches multiple dictionaries at once)
  • Oxford Reference Online
  • Yahoo! Reference Dictionaries
• Computer-Related Terms
  • E-mail & Online Chat Acronyms (dictionaries of acronyms used on the Internet)
  • Netlingo (dictionaries of acronyms used on the Internet)
  • Glossary of Internet Terms
  • Webopaedia
  • whatis.com

• Multilanguage
  • The Concise Oxford-Duden German Dictionary: English-German (Oxford University Press)
  • The Concise Oxford-Duden German Dictionary: German-English
  • The Concise Oxford-Hachette French Dictionary: English-French (Oxford University Press)
  • The Concise Oxford-Hachette French Dictionary: French-English
  • The Concise Oxford Spanish Dictionary: English-Spanish (Oxford University Press)
  • The Concise Oxford Spanish Dictionary: Spanish-English
  • Directory of Bilingual and Multilingual Dictionaries
  • Foreign Language for Travelers
  • The Pocket Oxford Italian Dictionary: English-Italian (Oxford University Press)
  • The Pocket Oxford Italian Dictionary: Italian-English
  • WordReference.com
  • YourDictionary.com
• Online Translators
  • Babelfish
  • Google Language Tools
  • bab.la Language Portal

Thesauri

• The Oxford American Thesaurus of Current English (Oxford University Press)
• The Oxford Paperback Thesaurus (Oxford University Press)
• Roget’s International Thesaurus (from Bartelby.com)
• The Wordsmyth English Dictionary-Thesaurus