Requires iOS 5, no iPad support
Do you use the dictionary a lot? But don't want to open the dictionary app all the time?
After the installation of SpotDict, your search bar in Spotlight will be resized, and in the space that left will be added a button of SpotDict, after you enter the text you want to look up in the dictionary in Spotlight, simply press on the SpotDict button and it will show the dictionary menu that Apple built.
No options to configure.
See larger Screenshots below..