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| Alphabetical | By Popularity (What's This?) | | - Merriam-Webster Dictionary
 - Free online version of the Merriam-Webster English dictionary, with searchable dictionary definitions, thesaurus, and a student dictionary for kids. Also offers online subscription versions of Merriam-Webster's collegiate dictionary and the Encyclopedia Britannica. - Dictionary.com
- Free online English dictionary site, offering word definitions, synonyms, word of the day emails, and writing resources. - YourDictionary
 - Directory of online English dictionaries and thesauruses, translation dictionaries of 150 different languages, grammar help for 70 languages, and pages of linguistic fun. - OneLook Dictionaries
 - Dictionary search service that offers definitions from a variety of online English and foreign language dictionaries. Find the definition of a term, see terms that correspond to definition key words, or search for the correct spelling of a word. - Free Dictionary, The
- Free online dictionary search, offering English, medical, legal, and computer dictionaries as well as a thesaurus, encyclopedia, and literature reference library. - Cambridge International Dictionaries
- Search Cambridge's free online dictionaries of English, English for students, French, Spanish, phrasal verbs, or idioms. - Merriam-Webster's Word Central
- Offers kids a student dictionary, Word of the Day, and interactive word games. Includes homework help and lesson plans for parents and teachers. - AllWords.com
- Online English dictionary with multi-lingual translations to or from Dutch, French, German, Italian, or Spanish. Includes crossword puzzle solver features, creative writing tips, and slang words. - Wordsmyth Dictionary-Thesaurus
- Online dictionary, thesaurus, and other American English resources for students and the general public. Find word definitions, spellings, and synonyms, or try tools like the Wordsmyth glossary maker or anagram solver. - AskOxford.com
- Searchable online version of the Compact Oxford English Dictionary, as well as thesauri, quotations, foreign language dictionaries, a word of the day, and games. - HyperDictionary
- Online dictionary featuring links to explanations of difficult terms within a given word's definition. Includes computer, dream, and medical dictionaries. - DICT.org
- Dictionary search site that draws on dictionaries and reference sources including Webster's, Jargon File, translation dictionaries, and Roget's Thesaurus. Created as part of an experiment to create a data exchange protocol for dictionary information. - VoyCabulary
- Turns the words on a webpage into links to their dictionary definitions, so you can look them up with a single click. Includes thesauri and foreign language dictionaries. - Newbury House Dictionary of American English
- Free online version of the Newbury House Dictionary of American English, with simple definitions for students and English learners. - CoolDictionary.Com: Audible Webster Dictionary
- Online version of Webster's American Dictionary, with audio clips of the correct pronunciation of words and quotes. - Encarta World English Dictionary
- Online English dictionary and thesaurus, featuring audio clips of words pronounced, as well as a word of the day. - Word Assault
- Searches multiple English dictionaries for words and phrases. Includes thesaurus, place names, computing terms, a Bible dictionary, and the CIA World Factbook. - Visual Dictionary, The
- See definitions for terms from biology, anatomy, and music with the InfoVisual visual dictionary. Browse by topics and thumbnails, or search for a word or phrase. - OneLook Reverse Dictionary
- Reverse dictionary lets you enter a concept to see matching words and phrases, for those times when you remember the definition but not the word. - WordIQ.com
- Reference resource that includes an encyclopedia, dictionary, almanac, thesaurus, and dream interpretation database as well as a general search engine. - Wiktionary
- Collaboratively produced multilingual dictionary, with meanings and definitions, etymologies, and pronunciations. From the founders of Wikipedia. - Hypertext Webster Gateway
- Online version of Webster's Dictionary, searchable by word or phrase. - Longman Dictionary of Contemporary English
- Online English dictionary, with photo illustrations, audio files of selected word pronunciations, example sentences, and lesson plans for teachers. Also available as a CD-ROM edition. - Dictionary of American Regional English
- Online American English dictionary, specializing in local slang and regional words and phrases. - English-Dictionary.us
- No-frills online English dictionary that users can search by word or phrase or browse alphabetically. - American Heritage Dictionary of the English Language, Fourth Edition
- Free online version of the American English dictionary featuring over 90,000 definitions, most with audio word pronunciation guides. - Grandiloquent Dictionary
- Collecting and defining the most rare, obscure, and pretentious words in the English language. Available in HTML and PDF formats. - ARTFL Project: 1913 Webster's Revised Unabridged Dictionary
- Search for and browse historical dictionary definitions from the 1913 edition of Webster's Dictionary. - Datasegment Online Dictionary
- Online dictionary allowing users to search and browse word definitions from multiple English dictionaries and a thesaurus. - WordWeb Online
- Online dictionary and thesaurus which covers American, British, Australian, Canadian, and Asian English spellings and words. - Omnificent English Dictionary In Limerick Form, The (OEDILF)
- Dedicated to writing at least one limerick for each and every word in the English dictionary. - Yahoo! Reference
- Find an online encyclopedia, quotations, and other fact-finding tools at Yahoo! Reference. Search for dictionary definitions, spelling help, thesaurus synonyms, maps, flags, and other answers. - BambooWeb Dictionary
- Online dictionary and encyclopedia providing articles and information on a wide variety of topics. Browse encyclopedia entries by subject, or search for information by key words. - iTools Language Tools
- Online dictionary service that includes a thesaurus, industry-specific terminology, crossword puzzle and Scrabble help, and translation tools. - ObjectGraph Dictionary
- Free online dictionary that suggests words and phrases as you type in the search box. - LookWAYup
- Online multilingual dictionary and thesaurus search tool that can be embedded into a web page. - Dictionaryofsign.com
- Online international dictionary of sign language. Allows users to send in their own video clips of sign language for use in the dictionary. Bilingual Canadian Dictionary
- Interuniversity project to produce a truly Canadian English-French dictionary for sophisticated language users.- Phoebe
- Online dictionary providing word definitions and links to additional resources. - New Dictionary of Cultural Literacy
- Searchable online dictionary of cultural phrases and shared concepts, from the Bible to new technology, sorted alphabetically and by subject. - Century Dictionary Online
- Searchable American English dictionary, featuring JPEG images of the correct pages in the print version of the Century Dictionary. - Merriam-Webster's Open Dictionary
- Submit and share entries that aren't already in the online dictionary. - Hutchinson Dictionary of English
- Defines selected words that are often misused or misspelled. The Hutchinson Dictionary of English Usage explains the difference between words that are commonly misused. - Dictonary Page
- Quick reference guide and dictionary of complicated or uncommon words that are often misspelled. - eLook.org Dictionary
- Online dictionary provides definitions, synonyms, and related words. - Language Bin, The
- Online dictionary featuring an interface that allows users to see word definitions from multiple sources simultaneously. - Difficultwords
- A searchable dictionary of selected difficult or uncommon words. - 123words.com
- English dictionary with lists of words sorted by their popularity on the Web. Features links to Spanish, French, Italian, Chinese, Hindi, etymology, and thesaurus resources for each word. - DifficultWords.info
- Provides a searchable dictionary of selected difficult or uncommon words. - Definitions.net
- Online dictionary providing instant lookup and translations of word and phrase definitions, complete with images. - Visuwords™ Graphical Dictionary
- Visuwords looks up word meanings and associations with other words and concepts. This graphical dictionary is a helpful tool for writers, journalists, students, and teachers. - definr
- Very fast and simple dictionary which suggests possible words as you type. Good for the spelling-challenged.
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