Dictionary.com
Free online English dictionary, thesaurus and reference guide, crossword puzzles and other word games, online translator and Word of the Day.
dictionary.com

ArtLex - Art Dictionary
Dictionary of art terminology, especially for art students elementary through undergraduate.
artlex.com

Semantic Rhyming Dictionary
Rhyming dictionary and thesaurus: rhymes, near rhymes, homophones synonyms, and semantic siblings of English words.
rhymezone.com

Merriam-Webster's WordCentral.Com
Student dictionary and rhyming dictionary online at Merriam-Webster's website. Daily Buzzword by subscription.
wordcentral.com

Little Explorers
Picture dictionary gives definitions, pictures, and Internet links for more than 1,100 words. Includes English and French, German, Portuguese, and Spanish to English dictionaries.
enchantedlearning.com

The Internet Picture Dictionary: Italian
Free, online multilingual picture dictionary with interactive activities for Italian, English, French, Spanish, German and ESL learners.
pdictionary.com

PseudoDictionary
Compiling words that people may use all the time that aren't in a normal dictionary. Includes slang, webspeak, and colloquialisms. Submissions welcome.
pseudodictionary.com

Merriam-Webster's Thesaurus
Searchable online thesaurus from Merriam-Webster.
merriam-webster.com

The Internet Picture Dictionary
Multilingual picture dictionary with interactive activities for learning English, French, German, Spanish, and Italian.
pdictionary.com

Fact Monster
An online dictionary with definitions and information about the history of over 125,000 words.
dictionary.factmonster.com

Skeptic's Dictionary
Definitions and essays on occult, paranormal, and supernatural ideas and practices from the point of view of someone who is a sceptic, that is, does not believe in these things.
skepdic.com

USM's Dictionary
Find thousands of dictionaries for any language or profession.
student-manual.com

DinoDictionary.com
Features profiles of over 300 known dinosaurs along with audio files that demonstrate how to pronounce their names.
dinodictionary.com

Wordsmyth
American English dictionary with an integrated thesaurus and other lexical resources.
wordsmyth.net

Webopedia
Searchable online dictionary and internet search engine for computer and internet terms and technical support. Definitions hyperlinked to further information.
webopedia.com