• AskOxford.com   - Free dictionary produced by Oxford University Press. Answers questions on English grammar, spelling, and usage. Ability to search a dictionary of words, names or quotations; also provides help with writing and for crosswords and puzzles.
• Merriam-Webster OnLine   - Free searchable dictionary and thesaurus, word games, a word of the day, and many other English language and vocabulary reference tools and resources.

   

• AllWords.com - Features two modern English dictionaries, multilingual search, and translation. Also features a guide to language sites on the web and a language discussion forum.
• The Beet Foundation - General purpose online English language dictionary and Thesaurus.
• Beginners English Dictionary - Contains over 2000 everyday words and phrases. Includes Idioms and Expression Pages.
• Cambridge Dictionary - Free online dictionary from Cambridge University Press.
• The Century Dictionary Online - Free 500,000 word dictionary of English with an encyclopedia and world atlas. Contains headword lookup and a full text search of 22 million words of text.
• Chambers 21st Century Dictionary - Access to the free dictionary through a single search interface.
• Cooldictionary.com - Free edition of a complete Webster dictionary. Fully crosslinked. Includes sound.
• DataSegment Dictionary - Find definitions by alphabetical browsing or word lookup. Powered by several print dictionaries.
• DICT Development Group - A WWW interface to several freely available on-line dictionaries, including Webster's 1913, the Jargon File, the US Gazetteer, and Easton's Bible Dictionary.
• Dictionary of Difficult Words - Search or browse this dictionary of more than 13,000 words.
• Dictionary of Indian English - Regionalisms defined.
• Dictionary.co.uk - Searchable dictionary which includes the ability to add a word.
• Dictionary.net - A dictionary database of word and phrase definitions from eight different sources.
• Elizabethan Dictionary - Provides the origins and meanings of Elizabethan words and vocabulary including obscure Shakespearean expressions.
• eLook Dictionary - Provides definitions, synonyms, and related words.
• English Dictionary - Definr.com - English dictionary contains 150,000 entries.
• English-dictionary.us - Simple English dictionary.
• Examining the Oxford English Dictionary - A scholarly analysis of the Oxford English Dictionary by Dr Charlotte Brewer, Hertford College, Oxford.
• GrokItBetter.com - A visual dictionary. Contains a graphical presentation of the semantic context of words, including synonyms, generalisations and other semantic relations.
• HyperDic - Based on the WordNet lexical database and thesaurus, this dictionary covers only a selection of the most frequent English words. Includes synonyms, antonyms, examples and pronunciation, and links between related words.
• HyperDictionary.com - Includes a thesaurus and searchable dictionaries for English, computers, dreams and medicine.
• Hypertext Webster Gateway - Provides access to multiple English dictionaries.
• Information Please Dictionary - Infoplease's free online dictionary. Features almanacs, an encyclopedia, and an atlas.
• Internet Terms Dictionary - Internet Terms Dictionary contains over 500,000 terms.
• The Jargon Database - A repository of popular neologisms, management speak, and technical terms relevant to various regions, jobs, and cultures, and organized by categories.
• Just-Define Dictionary - Contains thousands of word definitions.
• Lexipedia Visual Word Web - Visual dictionary. Includes definitions and examples of sentence use.
• Literature Dictionary - Literature dictionaries and glossaries.
• Longman Dictionary Of Contemporary English - Searchable dictionary of contemporary English.
• Macmillan English Dictionaries - Resource site for the Macmillan range of dictionaries.
• Memidex Dictionary - An online dictionary originally based on WordNet, contains extensive cross-references, hierarchical links, and a complete listing of inflections.
• Middle English Dictionary - A concise dictionary of middle English. Time period is from A.D. 1150 to 1580.
• Mnemonic Dictionary - Mnemonic Dictionary is a resource which provides memory aids for each word.
• The Newbury House Online Dictionary - Search over 40,000 entries to get clear concise definitions and when available related pictures.
• Ninjawords Dictionary - A free searchable on-line dictionary.
• OneLook Dictionaries - Contains a database of words, terms, names, and acronyms.
• Online Dictionary - Die.net - Cross-referenced definitions, spelling correction, and searches from WordNet and Webster's.
• Online Dictionary of Language Terminology - Explains key language terms such as: nouns, verbs, aspects, and tenses. Provides usage and grammar guidance.
• Oxford Advanced Learner's Dictionary - Allows users to search, free of charge, for entries in the latest (year 2000) edition of the Oxford Advanced Learner's Dictionary.
• Plan of an English Dictionary (1747) - Letter written by Samuel Johnson to the Earl of Chesterfield setting out his plan for an English Dictionary.
• Reference Dictionary - A dictionary of words and phrases on the verge of extinction.
• Suggestive Dictionary - An English dictionary which suggests words as one types. Helps explore new words and meanings.
• Ultralingua - Searchable dictionary of the English language, with standard, reverse and phonetic lookup. Also links to a range of other language resources.
• Virtual Dictionary - Searchable English language dictionary shows results in synonym sets.
• Voycabulary - Online dictionary and thesaurus web linking lookup reference tool.
• Webster's Unabridged Dictionary of 1913 - Forms version. Allows browsing headwords.
• Wiktionary - English language Wiki dictionary from the Wikimedia Foundation.
• Word Central - Student dictionary and rhyming dictionary online at Merriam-Webster's website. Daily Buzzword by subscription.
• Word Information Dictionary - A dictionary of English words derived from Latin and Greek Sources. Ability to find the Latin and Greek origins or etymologies.
• Word Spy - Site dedicated to recently coined words and existing words revived into modern usage.
• Word Sytes - Use this online dictionary to search for definitions in WordNet, Webster's and many other databases.
• WordIQ Dictionary - Searchable definitions available in a variety of dictionaries including Webster's, a legal dictionary, a dream dictionary, and an encyclopedia.
• The Wordsworth Compendium - Program containing over 516,000 English words and phrases to solve word puzzles. Useful for the search and manipulation of words in all aspects of logological activities.

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