If you are searching for a free online dictionary so, this one could be very helpful for you. Wordnik is dedicated to not only defining words, but also providing the pronunciation, an example sentence, related words, statistics and images. This dictionary is completely free, if you want to save your favorite words, add a commentary, record pronunciations or even suggested related words, you can register an account, is free and you don’t have to sign up to use the dictionary. If you want a definition of a word, just type a word you want to look for and then click the magnifying glass button. This dictionary is very helpful for home works, check this out!