Learning English - Học Tiếng Anh Online

English Dictionary Online

VDict (Vietnamese Dictionary) is the best and totally free Vietnamese-English-French Online Dictionary

Merriam-Webster Dictionary
You can hear the pronunciation of words.

AskOxford You probably know the famous Oxford Dictionary. This is the online version with a lot of advantage compare to the hardcover book thanks to its richness of resource such as writing tips, grammar tips, ask the expert, the quotes of the day. You can also find the Children Dictionary from this site and other world of English dictionaries such as Australian English , New Zealand English, American English and Canadian English.

Visual Dictionary. To learn by way of image with thematic, clear and precise pages, with concise and rigorous texts.

Cambridge Advanced Learner's Dictionary
You can add it to your browser.

Newbury House dictionary of American English contains over 40,000 entries. With simple, clear definitions, and provides a wealth of sample sentences and idioms.

Encyclopedia Britannica
Lets users simultaneously search the encyclopedia, expert reviews of the Web's best sites, timely articles from leading magazines, and related books.

Encarta World English Dictionary A big talking dictionary, click to hear the pronunciation of the word.

Wikipedia!
A free, open-content encyclopedia in many languages.

Your dictionary.com
More than 1500 dictionaries representing more than 230 languages.

Answer.com
A great site with all definition of every concept and term

Babel Fish
Machine translations of texts.

Eurodicautom
The European Commission's multilingual term bank. The focus is on specialized and technical terminology.