General Dictionaries

American Heritage Dictionary of the English Language
From Bartleby. Over 90,000 entries feature 10,000 new words and senses, 70,000 audio word pronunciations, 900 full-page color illustrations, language notes and word-root appendixes.

Dictionary Resources
From the Internet Public Library.

Encarta World Engish Dictionary
Find the meaning of a word, hear it spoken.

OneLook Dictionaries
Over 700 dictionaries that cover the subjects of a general nature, slang, arts & humanities, business/government, computer/Internet, medical, religion, science, sports and technolgy.

Specialized Resources

Acronyma
Identifies acronyms ("abbreviations coined from the initial letter of successive words in a term or phrase") in seven languages.

Synonym.com/Antonym.com

Oxymorons
An oxymoron is a literary figure of speech in which opposite or contradictory words, terms, phrases or ideas are combined to create a rhetorical effect by paradoxical means.

Visual Thesaurus
Looking up a word creates an interactive visual map with your word in the center of the display, connected to related words and meanings. Click on these words or meanings to explore further.