English:
- Merriam-Webster Dictionary - official site for the reference publisher. Includes online versions of the collegiate dictionary and thesaurus.
- OneLook Dictionaries - search for multiple definitions of a word from a variety of online dictionaries.
- allwords.com - English dictionary with multi-lingual search capability. Includes crossword solver features.
- American Heritage Dictionary of the English Language, Fourth Edition - features over 90,000 entries, most with audio word pronunciations.
- Oxford Dictionaries - contains a dictionary and thesaurus, as well as quotations, word of the day, games, and lexicography.
- Cambridge International Dictionaries - search separate dictionaries of English, phrasal verbs, or idioms.
- Century Dictionary Online - American dictionary with full text search page images representing the definitions, atlas, and cyclopedia from the original text.
- CoolDictionary.Com: Audible Webster Dictionary - features audio clips of words and quotes.
- DICT Development Group - simultaneously search several dictionaries for word definitions including Websters, Jargon File, and other databases.
- Dictionary of American Regional English - specializes in regional words and phrases.
- Dictionary.com - features a variety of tools including thesauri, translator, and writing resources.
- FreeDictionary.org - simultaneously and efficiently searches several dictionaries for word definitions.
- HyperDictionary - displays definitions with each individual word in the definition hyperlinked to its definition.
- iTools Language Tools - features dictionary, thesaurus, and translation tools.
- LookWAYup - dictionary and search tool embedded into the web page.
- VoyCabulary - makes the words on any webpage into links so you can look them up in a dictionary or other reference site, by simply clicking on the words.
- WebRef.org - providing glossaries of terms related to various scientific disciplines, aesthetic arts, and biographical information.
- Word Assault - searches various dictionaries for multiple words at a time.
- Wordsmyth Educational Dictionary-Thesaurus - American English dictionary with an integrated thesaurus and other lexical resources.
American Sign Language:
- American Sign Language Browser - ASL dictionary that lets you see the words being signed in QuickTime video. A project of the Michigan State University Communication Technology Laboratory.
- Basic Dictionary of ASL Terms - combination of text, graphics, and animation.
Chinese:
- Web of Chinese Character Dictionaries, A - allows simultaneous searching of the major Chinese character dictionaries on the web; requires Chinese browser or fonts.
- Chinese Character Dictionary - with lookup capabilities in English, Pinyin, Cantonese, or by character paste-in.
- Dictionary of Chinese Characters - Mandarin-Cantonese-Hakka-English character dictionary, with several different look-up methods for characters and Romanizations.
- English-Chinese Online Dictionary - includes GB, BIG5, and IMAGE output.
- Lexiconer Online Dictionary - English-Chinese and Chinese-English dictionaries with GB input and output.
French
- Bilingual Canadian Dictionary - interuniversity project to produce a truly Canadian English-French dictionary for sophisticated language users.
- Dictionnaires d'autrefois - project to make available online versions of the authoritative French dictionary. All or part of these editions are available: 1st Edition, 1694; 5th Edition, 1798; 6th Edition, 1835.
- English-French Sailing Dictionary - dictionary of sailing terms may be useful to English speakers sailing in French-speaking waters.
- French - English On-line Dictionary - database from the freeware multilingual program Ergane.
- French/English Dictionary - contains 35,000 French headwords along with 18,000 French expressions and compounds.
- Little Explorers English - French Picture Dictionary - by Enchanted Learning Software.
- Lookwayup: Online French English Dictionary - offers drag and drop translations of French to English.
- Online English to French to English Dictionary - offers online translation from French to English and English to French.
- German - English On-line Dictionary
- German<->English Dictionary - simple bilingual dictionary based on a wordlist of about 130,000 entries.
- LEO English/German Dictionary - bilingual dictionary offering a variety of search options.
- Online Film Dictionary - reference for movie terms in foreign languages.
Greek:
- Greek-Ancient Greek-English Dictionary - translation dictionary for English, Greek, and Ancient Greek.
Hungarian:
Hindi:
- A dictionary of Urdu, classical Hindi, and English. Online version of John T. Platts' 'A Dictionary of Urdu, Classical Hindi, and English' from the Digital Dictionaries of South Asia
- yourDictionary.com - Indo-Iranian Languages Hindi - Profile. Shakespear's Hindustani-English Dictionary; English-Hindi. Dictionary (transliterated text file); English-Hindi Dictionary
- Puja - Archaka :: English to Hindi Dictionary.
- English to hindi dictionary shabdakoSha .. The eText of the dictionary includes English word on the left, its grammar structure.
- World's First English-Hindi Dictionary English To Hindi Dictionary -Enter English word.
- Hindi Dictionary links Other languages. Hindi Dictionaries. Dictionaries for Hindi - English. Hindi Electronic Dictionary (no verbs); Hindi Electronic Dictionary (verbs).
Japanese:
- Nihongo: Japanese Language - searchable E/J, J/E dictionary, archive of "What's in a Word" columns originally published in Japan Currents, and more.
- WWWJDIC
Korean:
- Korean Online | Dictionaries Here you search Korean-English and English-Korean dictionaries
- Korean Dictionary
- Korean-English-Korean IT glossary - Terms Korea
- English-Korean Dictionary
- Whatis English-Korean Computer Terms
Malay:
- Dr. Bhanot's Malay-English Dictionary - offers word search.
Russian:
- Live Dictionary - features a new weekly dictionary from ETS Publishing House, with new Russian words, usage with context and praxis, acronyms, abbreviation, proverbs etc.
- Online English to Russian to English Dictionary
- Russian-English English-Russian Dictionaries
Spanish:
- Diccionarios.com - translations and definitions for Spanish to English, Spanish to French, Catalan to Castilian, and vice versa. Also includes Spanish synonyms and antonyms.
- English-Spanish Text Composition System - dictionary of common phrases and expressions.
- Online English to Spanish to English Dictionary - simple to use English to Spanish and Spanish to English online translator.
- SpanishDict.com - Spanish-English translation dictionary with audio clips of proper pronunciation.
- LangtoLang - multilingual translation dictionary.
- allwords.com - English dictionary with multi-lingual search capability. Includes crossword solver features.
- Internet Picture Dictionary - multilingual picture dictionary with interactive activities for learning English, French, German, Spanish, and Italian.
- Travlang's Translating Dictionaries - multilingual online dictionaries including German, French, Spanish, English, Dutch, Danish, Afrikaans, Esperanto, Frisian, and more.
- WordReference.com - enables website visitors to double-click any English word for a definition or translation.
- WordSniffer - multi-lingual dictionary for English, German, French, Spanish, Italian, Japanese, Chinese, and more. Offers definitions, pronunciations, and sample sentences.
- English - Afrikaans On-line Dictionary
- English-Czech Dictionary
- English-Czech Dictionary / Anglicko-Ceský slovník
- English-Estonian Dictionary
- Finnish - English On-line Dictionary
- Online English to Finnish to English Dictionary
- Hawaiian Dictionary Online - Hawaiian-English and English-Hawaiian words.
- Anthon's English-Polish Dictionary
- Polish-Ukranian-English Dictionary Online - trilingual word list.
- Small English-Polish Dictionary
- Portuguese Language Dictionary - supports different kinds of searches; includes a verb conjugator.
- Beginner's Yiddish Dictionary - look up Yiddish words, see their Yiddish-letter spellings, and get a brief definition.
- Yiddishkeit - A-Z glossary of Yiddish words and expressions.