Disable dictionary results in Spotlight? How can I remove dictionary results from Spotlight results? I've typed "chrome" into Spotlight and looked up chrome in the Dictionary one too many times, and now opening Chrome takes an extra keystroke.

I've seen comments about defaults write com.apple.spotlight DictionaryLookupEnabled NO, but this doesn't seem to work with Mac OS 10.8, even after a sudo killall -u _spotlight.
TinkerTool also allows you to change this preference via a GUI (rather than a Terminal command). It's under Applications > Spotlight:



Note that you will have to log out and back in for the changes to take effect.