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Internet dictionary of slang words and phrases. More than 5 million street lingo words and expressions have been defined by the Internet community. The definitions on Urban Dictionary are meant to be those of slang or subculture words, phrases, and phenomena not found in standard dictionaries and tend to have the newest words. Entries are checked by volunteer editors and rated by site visitor…

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Bartleby combines the best of both contemporary and classic quotations collections (over 86,000 entries), the largest of its kind ever compiled.

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Look up your word in this authoritative Merriam-Webster Online Dictionary, with more than 215,000 definitions with pronunciations

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Wordsmyth's dictionary contains 50,000 headwords, and very precisely defined and hyperlinked synonyms

When you have a sentence that you want to write, but aren't sure how to phrase some parts of it, phraseup* helps by finishing the sentence for you by suggesting possible combinations of words that fit well in the spots where you place a *. Each suggestion is accompanied by definitions, synonyms and translations to other languages.