The leading dictionary for learners of English of all ages and levels. The Longman Online Dictionary of contemporary English website provides support and resources for all teachers and learners who want to learn more about English: definition, idioms, examples and more.

A free online dictionary that offers definition search from Webster's dictionary for word meanings and thesaurus. Use this dictionary search as a crossword or scrabble dictionary. Also find legal dictionary, technical words, glossary, foreign language translation, medical dictionary, and rhyming dictionary lists.

Look up a word or term in an Internet dictionary or glossary. Free search access to a frequently updated database of words, terms, names, and acronyms.

The English language Wiktionary, a collaborative project to produce a free-content multilingual dictionary. Wiktionary is a wiki, which means that you can edit it, and all the content is licensed under the GNU Free Documentation License.

Free online dictionary search, translator, word of the day, crossword puzzles and word games, and vocabulary learning resources for many languages.