• Abbreviations.com
    Directory and search engine for acronyms and abbreviations.
  • Acronym Finder
    Dictionary of acronyms and abbreviations. Contains over 750,000 definitions.
  • Answers.com
    Aggregator of definitions, encyclopedia entries, and language translations.
  • Cambridge
    Search multiple dictionaries from Cambridge University Press.
  • Computer Definitions
    Featuring 20,000 topics and 2,500 images. Search field at bottom of page.
  • Definitions.net
    Multilingual dictionary that provides definitions and translations.
  • Dictionary.com
    Includes definitions from American Heritage, Random House, and Merriam-Webster.
  • Investor Words
    Financial glossary with a comprehensive index of 7,500 definitions.
  • Law.com Dictionary
    Concise, easy-to-read definitions from The People’s Law Dictionary.
  • Macmillan
    British English and American English dictionaries.
  • MarketingPower Dictionary
    4,000 cross-referenced definitions of marketing terms.
  • Mathworld Dictionary
    Source of mathematical definitions and concept explanations.
  • Med Terms
    Easy-to-understand explanations of more than 16,000 medical terms.
  • Medi Lexicon
    Search over 200,000 medical terms, ICD-9 codes, hospitals, and more.
  • Merriam Webster
    Based on the print version of Merriam-Webster’s Collegiate Dictionary.
  • Merriam Webster Visual Dictionary
    6,000 full-color images; 20,000 terms with contextual definitions.
  • Net Lingo
    Definitions for thousands of terms in the field of technology and communication.
  • OneLook
    Meta-search tool indexing 13 million words from 1,000 dictionaries.
  • Oxford Dictionaries Online
    Oxford’s Compact English Dictionary contains 145,000 words and definitions.
  • Thesaurus.com
    Over 17,000 entries. Find synonyms, antonyms, and brief definitions.
  • The Free Dictionary
    General and subject dictionaries for financial, legal, and medical terms.
  • Urban Dictionary
    Dictionary of contemporary American slang. Not appropriate for children.
  • Visual Thesaurus
    Displays a unique visualization of connections between words.
  • Vocabulary.com
    Outstanding dictionary and engaging vocabulary teaching tool.
  • WebMD Medical Dictionary
    Thousands of medical entries from abdomen to zygote.
  • Webopedia
    Dictionary of computer and Internet terms.
  • Wiktionary
    Multilingual dictionary and thesaurus written and edited by the public.
  • Word Spy
    Blog tracking new words and phrases in popular use.
  • Wordnik
    Aggregator of definitions, images, and word usage statistics.
  • YourDictionary
    Definitions, thesaurus entries, spelling, pronunciation, and etymology results.
  • Crossword Dictionary
    Find answers to crossword puzzles, anagrams and cryptograms.
  • Internet Anagram Server
    Remarkable, robust anagram lookup service from Wordsmith.
  • RhymeZone
    Writing tool for poetry, song lyrics, greeting cards, and more.
  • WordCount
    Artistic experiment that presents 86,800 English words, ranked in order of frequency.
  • Wordle
    Java-based word cloud generator. Customizable fonts, layouts, and color schemes.
  • Write Rhymes
    Simple online notepad with rhyme suggestions for poets.
  • Census Bureau: Statistical Abstract of the U.S.
    Compilation of statistics on the social, political, and economic organization of the U.S.
  • CIA: World Factbook
    Country-specific information compiled by the Central Intelligence Agency.
  • Country Profiles
    Current geographic, social, economic, and political summaries by country.
  • Fact Monster
    Almanac and reference site for children.
  • Fed Stats
    Easy access to official statistical information from numerous agencies.