Acronym Finder – a searchable database of more than 750,000 abbreviations and acronyms about computers, technology, telecommunications, and the military
AllWords.com – an English language dictionary for crossword solvers – has multi-lingual search capability
American Heritage Dictionary – 4th Edition – has over 90,000 entries, features 10,000 new words and senses, 70,000 audio word pronunciations, 900 full-page color illustrations, also language notes and word-root appendixes (contains some advertising)
American Sign Language Browser – Michigan State University’s online American Sign Language browser, contains video of thousands of ASL signs plus interesting information about the signs themselves – requires a browser that supports frames and the ability to embed quicktime movies
Amo’s Online Crossword Puzzle Dictionary – contains more than 170,000 words
Anagram Server – a product of Wordsmith – specializing in the art of rearranging letters of one word or phrase to form another word or phrase – contains links to other Wordsmith sites
Dictionary.com – a multi-source dictionary search service – each definition is followed by its source and a link to the source – contains both audio and spelled pronunciations – also citation notes
EnglishClub.com [ESL Resource] – a site for learners or teachers of English as a Second Language – contains lesson plans, games, etc. – access is free
Hyperdictionary – combines an English, Computer, Video, Dream, & Medical Dictionary plus a thesaurus
Merriam-Webster Online – based on the print version of Merriam-Webster’s Collegiate Dictionary, 11th edition – includes the main A-Z listing of the Collegiate Dictionary, as well as the Abbreviations, Foreign Words and Phrases, Biographical Names, and Geographical Names sections of that book – also includes 1,000 illustrations and 25 tables – omits some sections that cannot readily be reproduced in HTML
Thesaurus.com – produced by Dictionary.com, LLC – uses Roget’s II: The New Thesaurus
OneLook Dictionaries – searches in over 600 online dictionaries, including general, legal, and foreign dictionaries, as well as, specialized resources such as The Cadillac Performance Dictionary – provides links to the cited resource
yourDictionary.com
Wordsmyth: The Educational Dictionary-Thesaurus
Visual Dictionary Online