10.6: Disable Dictionary.app's Multiple Windows

In Snow Leopard, opening a definition from the dictionary result in Spotlight (or right-clicking on a word and selecting "Look Up in Dictionary") would result in the dictionary app creating a new window. I find this quite bothersome as the windows can quickly flood my screen. Fortunately, MacOSXHints has the solution. This simple terminal command:

defaults write com.apple.Dictionary ProhibitNewWindowForRequest -bool TRUE

To disable this modification, use:

defaults delete com.apple.Dictionary ProhibitNewWindowForRequest