WordWeb

If you bought a Longman , Oxford , or Cambridge dictionary, you may have gotten the cd with it. Then you don't really need a another dictionary on your computer. But if you don't have a dictionary cd or other type of dictionary for quick reference, I suggest you download WordWeb from http://wordweb.info/free/. This is a good dictionary, and the free version should work well enough for most of us. I have been using it now for about half a year and rely on it much of the time. It not only provides information about words, but it also has a thesaurus, so I can look up related words.