Have you ever been stuck in a cabin in the woods playing Scrabble with your friends when an intense debate begins about the spelling of the game-taking word? Next time you're without a strong internet connection (or just don't feel like doing the googling yourself) you can use your smartphone or computer to email firstname.lastname@example.org and you'll be treated to the dictionary definition and synonyms of any word.
All you have to do is send a blank email to the wordsmith.org address. Make the subject line: "define myword" where "myword" is insert the word whose definition you need.
It's also a fast way to solve word queries during lunch with friends because you don't have to suffer through a mobile search engine.