Oxford English DictionaryThis link opens in a new windowThe Oxford English Dictionary (OED) is widely regarded as the accepted authority on the English language. It is an unsurpassed guide to the meaning, history, and pronunciation of 600,000 words— past and present—from across the English-speaking world.
Contains definitions and translations from the Cambridge Dictionary of American English, Cambridge International Dictionary of English, Cambridge Learner's Dictionary, Dictionnaire Cambridge Klett Compact and Diccionario Cambridge Klett Compact.
A multi-source dictionary search service, including the American Heritage Dictionary of the English Language, Random House Unabridged Dictionary and Webster's New Millennium Dictionary of English.
Contains definitions and translations from Collins' Spanish English Dictionary, French English Dictionary, Italian English Dictionary, German English Dictionary as well as the Collins English Dictionary.
The Smithsonian from A to Z - search over 2 million records, with 210,500 images, video and sound files from dozens of Smithsonian museums, archives, and libraries
Searches over 100 encyclopedias, dictionaries and thesauruses, including The Columbia Encyclopedia, Oxford’s World Encyclopedia, and the Encyclopedia of World Biography.