The name says all: it's a dictionary online. And it's the best multilanguage dictionary online! Here you can find the meaning
of a huge quantity of words, in many language: English, Spanish, Italian, French, Chinese, Portuguese, Russian, Norwegian, Dutch and Greek. The dictionary is very well structured, and every meaning is explained in very detailed way. Also pictures are used to show some difficult meaning.
The graphical design is simple but absolutely clear. No misunderstanding, no long researches anymore about some meaning that ordinary dictionaries have forgotten!
But the service offered by this site is more interesting also: you can hear the correct pronunciation of the word that you looked for, in its own language. Then, on the site there are some interactive games - very easy to understand - which allow you to play and learn the language at the same time. The most famous game here provided is the Hangman (where you must guess the hidden word, if you don't want that the man on the screen will be hanged).
There are also very specialistic sections of terms: a section dedicated only to medicine words, law and right terms, finance stuff, and also there are acronyms and idioms. There are also links to an encyclopedia - if you need to expand your knowledge from the single word that you have to translate.
So, whatelse you can ask for? It's the perfect site for improving your linguistic skills, and also for enlarge your culture. If you are a total beginner or an advanced speaker of some language, the site has much to give you.
Look at it: you'll learn and you'll have fun at the same time. There are other online encyclopedias and online dictionaries too, but this one is so well designed and articulated, that you won't find no other site that offer what The Free Dictionary offers.