• AltaVista Babel Fish Translation – enables you to translate short passages of text or entire Web sites among 19 pairs of languages

Dictionaries

• The American Heritage Dictionary of the English Language, 4th edition – 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
• Cambridge Dictionary of American English – search the full text of the Cambridge Dictionary of American English, which also provides full sentence examples
• Compact Oxford English Dictionary – contains 145,000 words, phrases, and definitions
• Dictionary.com – a multi-source dictionary search service of over 15 dictionaries
• The Free Dictionary – an expanded version of the American Heritage Dictionary of the English Language, 4th edition, with 200,000 entries, audio pronunciation feature, and etymologies
• Merriam-Webster Online - searchable; provides pronunciation, word function, and simple etymology
• Oxford English Dictionary - contains the complete text of the 20-volume Second Edition.
  Requires USC ID and password for off campus access
• Wiktionary - a collaborative project to produce a free, multilingual dictionary with definitions, etymologies, pronunciations, sample quotations, synonyms, antonyms and translations. Wiktionary is the lexical companion to Wikipedia.

Multi-Language Dictionaries

• ARTFL PROJECT: French-English Dictionary – French - English dictionary containing about 75,000 terms.
• Dictionnaire Cambridge Klett Compact – French - English dictionary from Cambridge Dictionaries Online
• Diccionario Cambridge Klett Compact - Spanish - English dictionary from Cambridge Dictionaries Online
• Merriam-Webster Online – Merriam-Webster’s Spanish - English Dictionary online

Specialty Dictionaries

• A Basic Dictionary of ASL Terms – browsable dictionary of American Sign Language Terms that includes text and animated definitions
• Cambridge International Dictionary of Phrasal Verbs – dictionary of phrases that combine a verb with an adverb, preposition, or both that have a different meaning that the individual words
• Concise Dictionary of First Names – searchable dictionary of over 6,000 names
• Dictionary of Units – provides a summary of most of the units of measurement in use around the world today (and a few of historical interest), together with the appropriate conversion factors needed to change them into appropriate International System (SI) unit
• DOD (Department of Defense) Dictionary of Military Terms – browseable dictionary of approved U.S. military terminology
• The Free Dictionary – in addition to standard dictionary, includes access to computing, medical, financial, and legal dictionaries
• Little Oxford Dictionary of Quotations (second edition) – contains more than 4,000 quotations on over 250 subjects
• Techterms – computer and technical terms defined and explained

Thesauri

• The Free Dictionary – contains color-coded additional definitions, synonyms, related words, and anonyms
• Getty Art & Architecture Thesaurus – comprehensive vocabulary of nearly 120,000 terms for describing objects, textural materials, images, architecture and material culture from antiquity to the present
• Getty Thesaurus of Geographic Names – structured vocabulary developed primarily for the field of art history, but with the potential for wide applications in related disciplines such as archeology, history and geography
• Merriam-Webster Online - provides word function and hot-linked synonyms
• Roget's II: The New Thesaurus – contains succinct definitions as well as 35,000 synonyms and over 250,000 cross-references

Abbreviations, Acronyms, & Idiom Guides

• Abbreviations.com – search from word to abbreviation and abbreviation to word or browse by category
• Acronym Finder – more than 560,000 acronyms, abbreviations, and initialisms
• Cambridge International Dictionary of Idioms – dictionary of phrases and colloquial expressions
• Joint Acronyms and Abbreviations Master Database – browsable dictionary of U.S. military acronyms and abbreviations

General Encyclopedias

• The Britannica Concise – searchable single-volume encyclopedia complete with 28,000 articles from the editors of Encyclopædia Britannica
• Columbia Encyclopedia – contains nearly 51,000 entries and more than 80,000 hypertext cross-references, among the most complete and up-to-date encyclopediæ ever produced
• Wikipedia - a multilingual, web-based, free content encyclopedia project written collaboratively by volunteers from all around the world. With rare exceptions, its articles can be edited by anyone with access to the Internet.

Specialty Encyclopedias

• Cambridge History of English and American Literature – 303 chapters of literary history and criticism, with essay topics ranging from poetry and fiction to theology and political writing
• Encyclopedia Mythica – encyclopedia of mythology, folklore, and religion
• How Stuff Works – find out how just about anything works
• Medline Plus: Medical Encyclopedia – includes over 4,000 articles about diseases, tests, symptoms, injuries and surgeries, as well as medical photographs and illustrations
• Symbols.com – contains more than 1,600 articles about 2,500 Western signs, arranged into 54 groups according to their graphic characteristics
• Webopedia – online dictionary and search engine for computer and Internet technology