Dictionary.net : Online english dictionary, offers a database of word and phrase definitions from different sources.

Free Dictionary : Online english dictionary, offering wide range of english definitions, synonyms, pronunciation, spellings and much more.

LDOCE Online : Information source for learners of all ages and levels who want to learn more about english definition, idioms, examples and much more.

Merriam Webster : Searchable dictionary and thesaurus and many other English language and vocabulary reference tools and resources.

Mnemonic Dictionary : Provides fun and easy way to build vocabulary using pictures, visual, etymology, usage, word games and more.

Online Medical Dictionary : Online medical dictionary for definitions of terminology, pharmaceutical drugs, health conditions, specialty terms, medical abbreviations and much more.

Polish Dictionary : Online english polish dictionary contains thousands of words, phrases and expressions.

Virtual Dictionary : Online english dictionary displays word meanings and definitions of nouns, verbs, adjectives and adverbs.

Voycabulary.com : Online web dictionary and thesaurus linking reference tool, transforms words into links to definition and word lookups in dictionaries.

Your Dictionary : Online dictionary offering definition search from Webster dictionary for word meanings and thesaurus.