Wordnik encourages Word Exploration

Despite being packed with information, a dictionary usually gets scant attention: You look up a word to check its spelling or definition, maybe skim its etymology, and then return to what you were doing. But if you consult Wordnik, you could easily find yourself embarking on a languorous exploration of the English language.

Wordnik provides definitions from the American Heritage Dictionary of the English Language, Fourth Edition; the Century Dictionary; WordNet 3.0; and the GNU version of The Collaborative International Dictionary of English. Synonyms and antonyms are pulled from Roget's II: The New Thesaurus, Third Edition, and Allen's Synonyms and Antonyms. Definitions from Webster's Unabridged 1913 edition also occasionally make appearances.

There's more to a word than its definition, of course, and Wordnik supplements the basic information in several additional ways.