Dictionaries are great, but then you've got to search through them for the word you're looking to define. Too much work, I say! That's why I'm excited about the Unichal Dixau DX3 Digital Dictionary.
The DX3 is a small device with a camera that you point at whatever word you want defined. It then looks it up and displays the definition on its screen. Sure, this could be easily replicated on a smartphone with a decent app, but, well. Uh, OK, so I guess it's not worth creating an entire device around. But until that app is made, it's the only option you've got, lazybones.