I want a dictionary site where I can search for words by their definitions. For example, a moment ago I was trying to remember the word that means, "bring back from the dead". (Luckily a friend was online to compensate for my muddled memory and tell me that the word I was looking for is "resurrect".) Seems like that would be simple enough to plug into a search engine and get a list of words back.

Does such a thing exist?