English Online Language Dictionaries

  English Translation Engines

Translated.net Online Translation Engine - Translation service with free online translations of text from English to and from Chinese, French, German, Greek, Italian, Japanese, Korean, Portuguese, Russian, and Spanish, with a large variety of technical and specialty lexical databases.
Dictionary.com Translation Engine - Translate text from English to a number of other language combinations and vice-versa.
ProMT Online Translation Engine - Provides online translations for from English to a number of other languages and vice-versa with a number of other language options; also displays back-translation of the translated text.
Bowne Global Solutions iTranslator - Translate text from from English to a number of other languages and vice-versa; plus a number of other language combinations.



  English Hyper-Dictionaries and Directories

OneLook Dictionaries - Comprehensive hyper-dictionary interface that queries multiple dictionaries at a time.
The DICT Development Group - Hyper-dictionary search with jargon, computing terminology, biblical sources, almanacs, gazetteers, and many foreign dictionaries.



Bartleby.com - Online compendium of literature, with numerous dictionaries, encyclopedias, thesauri, books on quotations, usage, style, etc.
Dictionary.com - Comprehensive directory of dictionaries.
Yahoo! Reference - Reference directory from Yahoo!
WebRef.org - Glossary index with entries for the physical, biological, and social sciences, and the arts, plus an index of short biographies.



  English Dictionaries

GNU Collaborative International Dictionary of English (GCIDE_XML) - The GNU version of The Collaborative International Dictionary of English, presented in the Extensible Markup Language; searchable online, with downloadable textfile lexicon.
Merriam-Webster Online - Features free online dictionary and thesaurus with audio pronunciations in WAV format, plus subscription services to other content.
Merriam-Webster's Word Central - Kid-friendly vocabulary interface, with a student dictionary, Word of the Day, interactive word games; includes homework help and lesson plans for parents and teachers.
Compact Oxford English Dictionary - From the makers of the OED and other dictionaries.
Cambridge Dictionaries Online - Features dictionaries of American English, advanced learner's of English, idioms, phrasal verbs, French-English, and Spanish-English.
Infoplease Dictionary - English dictionary plus thesaurus, encyclopedia, atlas, and other information.
eLook.org Dictionary - Simple interface that provides definitions, synonyms, and related words.
HyperDictionary - Gives definitions with links to new entries for each word in the definition; with dictionaries for English, computer science, medicine, dream interpretation, and a thesaurus.
Dict.info English Dictionaries - A collection of free English bilingual dictionaries for Afrikaans, Arabic, Brazilian Portuguese, Byelorussian, Croatian, Czech, Danish, Dutch, Esperanto, Estonian, Fijian, Finnish, French, German, Greek, Hungarian, Icelandic, Indonesian, Inuktitut, Irish, Italian, Japanese, Japanese Romaji, Korean, Kurdish, Latin, Latvian, Malay, Maltese, Manx, Norwegian Bokmal, Pali, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swahili, Swedish, Traditional Chinese, Turkish, Ukrainian, Walloon, and Welsh. Browsable online, with word searches, and downloadable data files.
The Free Dictionary - English, medical, legal, and computer dictionaries, thesaurus, encyclopedia, a literature reference library, and a search engine all in one.
NetLingo.com - Dictionary of Internet terms and jargon.



  Other English Language Aids

The Elements of Style - 1918 edition of this classic reference book is a must-read for any student and conscientious writer.
Fowler - The King’s English - This reference work has remained a standard resource, serving generations of students and writers with commonsense rules of style and grammar.
American Heritage Book of English Usage - With a detailed look at grammar, style, diction, word formation, gender, social groups and scientific forms, this valuable reference work is ideal for students, writers, academicians and anybody concerned about proper writing style.
Bartleby.com - Online compendium of literature, with numerous dictionaries, encyclopedias, thesauri, books on quotations, usage, style, etc.
The Wordsmyth English Dictionary-Thesaurus - Dictionary-thesaurus, with glossary maker, quiz builder, vocabulary drills, anagram solver, and crossword puzzle aid. Requires registration.
Online Etymology Dictionary - Word origins and histories.
OneLook Reverse Dictionary - Describe a concept and get back a list of words and phrases related to that concept.
CMU Pronouncing Dictionary - Gives pronunciations using a symbol set of 39 phonemes and three degrees of lexical stress.
EcoMate2000 - Electronic Dictionary of Finance EN/FR FR/EN; search economic terms in English and French.