Monolingual General Dictionaries on the Internet - Dizionari Generali Monolingue su Internet

Miscellaneous	Many	Onelook (Searches 589 dictionaries at once) - Select "definitions"
Definitions, usage, synonyms, antonyms, idioms	En	Merriam Webster Dictionary (or here) (select) (incl. audio pronunciation)
	En	Webster's Revised Unabridged Dictionary
	En	WordNet 1.5 Search (Synonyms, antonyms, parts of object, more general / specific, related words)
	En	WordNet 1.6 (or here)
	En	RhymeZone (definitions, synonyms, antonyms, related words, rhyming words, similar sounding words, homophones, similar spellings, words with matching consonants, quotations)
	En	Wordsmyth (definitions, usage, synonyms, idioms)
	En	Oxford Advanced Learner's Dictionary (OALD) (or here) (definitions, usage, synonyms, idioms)
	En	The Newbury House Online Dictionary (& illustrations) (definitions, usage, synonyms, idioms)
	En	Dictionary.com (definitions, usage, synonyms, idioms)
	En	Collins English Dictionary (Wordreference) (definitions, usage, synonyms, idioms)
	En	The American Heritage Dictionary of the English Language (definitions, usage, synonyms, idioms, incl. audio pronunciation)
	En	The American Heritage Dictionary of the English Language (definitions, usage, synonyms, idioms, incl. audio pronunciation)
	En	Encarta World English Dictionary
	En	Cambridge International Dictionary of English (select) (definitions, usage, idioms)
	En	Collins Cobuild English Dictionary (Definitions, idioms)
	It	Garzanti
	It	Parolevive
	It	LIST OF ITALIAN DICTIONARIES by Marcello Napolitano, (ATA - American Translators Association)
	De	Meyers Lexikon
	De	Wahrig Deutsches Wörterbuch (or here & select!)
	De	Leipzig (or here) (usage, idioms)
	Fr	Hachette (Francophonie)
	Fr	Larousse (or here)
	En	The American Heritage Dictionary of the Spanish Language (definitions, usage, synonyms, idioms, incl. audio pronunciation)
	Es	Diccionario de la Lengua Española
	Es	Vox/Vox
	Es	Diccionarios
	Es	Laenciclopedia - Diccionario de la Lengua Española
	Es	Diccionario del Español Usual en México
	Es	Dictionary of Chilean Spanish
	Pt	Porto Editora
	Pt	Michaelis
	Pt	Dicionário Universal Língua Portuguesa / Dicionário Universal Língua Portuguesa
	ZH	Chinalink
Dialects	It (CH)	Vocabolario di dialetto ticinese (or here)
	It (CH)	Il lessico italiano in Svizzera
	De (CH)	Pauker Dictionary of Swiss German terms (keywords: Schweizer Deutsch, Schwyzerdütsch)
	De (CH)	Schweizerdialekt (CH De-De / De-CH De)
	De (CH)	Schweizerdeutsch Alltag
Thesaurus (synonyms)	En	Roget's Thesaurus
	En	Roget's Thesaurus (Bartleby - 1)
	En	Roget's Thesaurus (Bartleby - 2, incl. definition)
	En	Roget's Thesaurus (260,000 synonyms & cross-references)
	En	Lexical FreeNet (Synonyms and related words; search for general terms or famous names)
	En	Merriam Webster
	En	Moby Thesaurus
	En	WordNet 1.5 Search (Synonyms, antonyms, parts of object, more general / specific, related words)
	En	WordNet 1.6 (or here)
	En	Bloomsbury's Thesaurus. Select "thesaurus".
	En	*** Thesaurus.com (incl. antonyms)
	En	RhymeZone (definitions, synonyms, antonyms, related words, rhyming words, similar sounding words, homophones, similar spellings, words with matching consonants, quotations)
	En	ISC Dictionary of Synonyms (France) (or here)
	En	Lycos dictionary (Select "Find synonyms", "Find related words" or "Find antonyms")
	Br En / US En	British English / American English
	Br En / US En	English2American
	Br En / US En	United Kingdom English for the American Novice
	It	Virgilio
	It	Parolevive
	Fr	Elsap
	Fr	Institut des Sciences Cognitives (ISC) (France) (or here, here, here)
	Es	Universidad de Oviedo
Anagrams	En	Lexical FreeNet (Search for general terms or famous names)
	En	Wordsmith Internet Anagram Server
Antonyms	En	**** WordNet 1.5 Search (Synonyms, antonyms, parts of object, more general / specific, related words)
	En	**** WordNet 1.6 (or here)
	En	RhymeZone (definitions, synonyms, antonyms, related words, rhyming words, similar sounding words, homophones, similar spellings, words with matching consonants, quotations)
	En	Lexical FreeNet (Search for general terms or famous names)
	It	Parolevive
Hypernyms (supernyms) & hyponyms	En	Lexical FreeNet (Search for general terms or famous names)
	En	WordNet 1.5 Search (Synonyms, antonyms, parts of object, more general / specific, related words)
	En	WordNet 1.6 (or here)
Idioms	En	Cambridge International Dictionary of Idioms (select) (idiom -> concept )
	En	GoEnglish Idiom Dictionary
	En	Phrase Finder (concept -> idiom)
	En	English idioms, sayings & slang (Wayne Magnuson)
	En	The Idiom Connection (idiom -> concept; category -> idiom)
	En	Idioms Guide (explanations, examples and translation in Chinese) (Virtual Language Centre, Hong Kong)
Slang	En	A dictionary of slang (peevish.com)
	En	English idioms, sayings & slang (Wayne Magnuson)

Phrase and Fable (incl. idioms, proverbs)	En	Brewer's
	En	Brewer's Dictionary of Phrase and Fable
	En	The Age of Fable or Beauties of Mythology
	En	***** Encyclopedia Mythica
	It	Dizionario Mitologico
Proverbs	En / Sp / Lat / Bas	Gotzon Garate
	En	Globegate
	Fr	Proverbes
	It	Dizionario dei Proverbi Italiani (Giuseppe Giusti)
	It	Parolevive
Phrasal verbs	En	Cambridge International Dictionary of Phrasal Verbs (select)
Foreign words	De	Wahrig Fremdwörterlexikon; (or here &select!)
	De	Langenscheidt Fremdwörterbuch (keywords: Helvetismus, Helvetismen, Swiss words)
Neologisms	It	Neologisms
	Fr / En (Def. in Fr)	Colba.net (Le petit Dico de la francophonie de NiouZeNet; French neologisms and English etc. words from which they are derived)
	Fr	Dictionnaire de néologismes (Balnéo)
	De	Begriff-wissen (uncommon words)
Encyclo- paedias	En	Metasearch (6 encyclopaedias at once)
	En	Britannica (or here)
	En	Britannica Concise
	En	Encarta, (or here, here, here) (search or browse. Also: dictionary & world atlas)
	En	Encyclopedia
	En	Infoplease
	En	Xrefer Reference search engine with about 55 sources including Oxford Paperback Encycl. and many other encyc./dictionaries) (Use " " for exact phrases!)
	En	Columbia Encyclopedia (Bartleby)
	En	The Canadian Encyclopedia Online
	En	How Stuff Works (descriptions and images)
	En	World Factbook 2001 (new every year)
	En	World Factbook
	En	World Factbook
	En	Countrywatch (main information about different countries)
	En	Uni Wuerzburg country information (incl. constitutions in English)
	En	*** Wikipedia (incl. terms in local languages as well as English)
	De	Wissen (select "gesamt Wissen A-Z")
	De	Xipolis (searches over 30 lexicons, dictionaries and encyclopedias)
	De	Encarta (ore here)
	It	Encarta
	It	Parolevive
	Fr	Encarta (or here)
	Fr	WebEncyclo (or here)
	Fr	The Canadian Encyclopedia Online
	Fr	Club-Internet (Encyclopédie et Atlas Hachette) (50 000 articles) (or here, here, here, here)
	Fr	Universalis (or here)
	Fr	Larousse Encyclopédie Kléio
	Fr	Quid
	Pt	Continental Portuguese Encyclopedia
	Pt	Laenciclopedia - Dicionário Enciclpedico
	Pt	Dicionario Enciclopedico Verbo (or here)
	Pt	Enciclopedia Verbo
	Pt	Enciclopédia Universal
	Es	Encarta
	Es	** Laenciclopedia
Pictorial	En	The American Heritage Dictionary of the English Langauge
	En	RhymeZone (Select "Search for pictures")
	De	Duden German
	Es	Laencicopedia
Quotations (Quotes)	En	Bloomsbury Biographical Dict. of Quot., Bloomsbury Thematic Dict. of Quot., Oxford Dict. of Quot. (3 in one go) Select "quotations".
	En	Bartlett's Quotations
	En	Bartlett's Familiar Quotations (over 11,000 searchable quotations)
	En	Simpson's Contemporary Quotations (1950–1988)
	En	Famous Quotations (search by category/keyword)
	En	RhymeZone (definitions, synonyms, antonyms, related words, rhyming words, similar sounding words, homophones, similar spellings, words with matching consonants, quotations)
	De	Zitatebank
	De	Zitate (blueprints.de)
	De	Das Grosse Z
	De	Zitate.at
	De	Zitatenschatz (or here) Browsable only (by category)
	De	1001 Aphorismen
	It	Virgilio - Citazioni/aforismi
	It	Parolevive
	Fr	Belles citations
	Fr	Dicocitations
	Fr	Citations du Monde
	Fr	ABCitations (Click on ABC)
	Fr	Dictionnaire des citations (Quebec)
Corpuses (usage; words in context)	Many	Logos
	En	**British National Corpus (BNC)
	En	VLC's Web Concordancer (English corpus) (or here) (Virtual Language Centre, Hong Kong) keyword: collocation
	En	Collins Cobuild's Corpus Concordance Sampler (The Bank of English) (56 million words of contemporary written and spoken text)
	En	Collins Cobuild's Corpus Collocation Sampler (The Bank of English)
	En	International Corpus of English (ICE) (mostly sound files of English spoken in many countries around the world: GB, India, Jamaica, Australia etc.)
	En	The Oxford Text Archive (Click on Full-Text Search)
	En	Wortschatz Lexikon
	De	Wortschatz Lexikon
	Fr	Wortschatz Lexikon
Acronyms and abbreviations (see also specialised fields)	En	Acronyms and Abbreviations (or here)
	En	Acronym Finder (or here)
	En	Acronyms and abbreviations
	En	Dictionnaire des acronymes (Quebec) (or here)
	De	Abkuerzungen.de
	De	Akronyme und Abkürzungen
	De	Allgemeine Abkürzungen (and "Eisenbahnspezifische Abkürzungen" and "Abkürzungen aus der Rechtssprache")
	It	Virgilio
	It (incl. En long form)	Sigle e Abbreviazioni Usate in Italia
	Fr	Dictionnaire des acronymes (Quebec) (or here)
	Nl	Afkorting
Rhyming dictionaries	En	Lycos ryhming dictionary (RhymeZone) (or here) (you can also search for words with same consonants!)
	En	RhymeZone (rhyming words, similar sounding words, homophones, similar spellings, matching consonants)
	En	Lexical FreeNet (Search for general terms or famous names). Also searches for similar sounding words.
	De	Reim-lekikon
	De	2Rhyme
Pronunciation	En	Merriam Webster Dictionary (or here) (select)
	En	Webster's Revised Unabridged Dictionary
	En	The American Heritage Dictionary of the English Language

General Dictionaries - Monolingual

Definitions, usage, synonyms, antonyms, idioms

Thesaurus (synonyms)

Phrase and Fable (incl. idioms, proverbs)

Quotations (Quotes)

Corpuses (usage; words in context)

Acronyms and abbreviations (see also specialised fields)

Acronyms and abbreviations
(see also specialised fields)