Online Reference Resources
Dictionaries
- Cambridge Dictionaries Online (Includes phrases and idioms)
- Dictionary.com
- Collins Dictionary
- The Free Dictionary
- Heinle's Newbury House Dictionaries
- Macmillan Dictionary
- Merriam-Webster
- OneLook Dictionary Search (Search many dictionaries at once)
- Online Etymology Dictionary
- Oxford Dictionaries
- Yourdictionary
Encycliopedia
- The Canadian Encyclopedia
- Encyclopedia Britannica
- Encyclopedia.com
- Encyclopidia of Diderot & d'Alembert
- Encyclopedia Mythica
- Encyclopedia Smithsonian
- Infoplease
- Questia
- Symbols.com unique online encyclopedia that contains everything about symbols, signs, flags and glyphs arranged by categories such as culture, country, religion, and more.
- Webopedia
Subject-specific Encyclopedias
- Cambridge History of English and American Literature
- Ancient History Encyclopedia
- Encyclopedia Mythica
- HyperHistory
- Internet Encyclopedia of Philosophy
- Jewish Encyclopedia
- Literary Encyclopedia
- LookLex Encyclopedia
- Spartacus - including British history 1700-1950, and two separate works for World War I
- Stanford Encyclopedia of Philosophy
- The ORB Encyclopedia: A Topical Index -- Medieval studies
- TechEncyclopedia
- Thomas Jefferson Encyclopedia