Imbedded Dictionary in OS X!
I’m pretty sure that everyone knows there’s a dictionary in OS X, and that there’s even a dictionary widget… BUT, did you know there’s an imbedded one (and thesaurus) in OS X? Yep… You can activate it anywhere!
Just mouse over a word you want to know the definition for, and then press:
Ctrl+Command(Apple Key)+D
You’ll see a popup with the definition, and on the bottom, left, you can select Thesaurus (or Apple). It also has slang words, like “cuz”
Super Handy =)

.: Adam