I seem to recall Leopard (and Tiger?) having a customizable keyboard shortcut for having the definition of the word you're pointing at popup. It didn't actually launch the dictionary or show the dictionary widget or anything, it just had a little semi-transparent bubble pop up with the definition in it. I think it's like, shift control command D by default in Leopard, but I'd changed it to just Command D since that was easier to remember. In any event, I just tried invoking it on the word "apathetic", and it didn't do anything. So I thought you know, maybe having upgraded to Snow Leopard changed the keyboard command. I went into System Preferences => Keyboard => Keyboard Shortcuts. I looked through all the options, and the closest keyboard shortcut it seemed to offer was Services => Searching => Look Up in Dictionary. Seemed pretty good, so I changed it to Command D, and then tried using it in Safari 4. It seems they've assigned that shortcut to "Add Bookmark" (right, D is an awesome choice... because both Add and Bookmark have it as an intial letter... and the D totally symbolizes Adding Bookmarks... A or + wouldn't work better, no way... eh, enough of a rant on that.) So I changed it to option command D and tried using it again. Rather than the popup I'm fond of, it launched the dictionary application. It's great and all that the dictionary application launches so fast, but I'd really much rather have the unobtrusive popup that disappears instantly when you point or click off of it. (Not to mention the fact that in order to even get this to work, you need to highlight the word, simply pointing at it isn't good enough.) So, I can't imagine the definition popup has truly been removed in Snow Leopard, rather more than likely it's just been moved. How can I use it? (And even if it's not available anywhere in the GUI, I imagine there's some terminal command that will restore it... if I have to resort to that, can someone tell me the commands to enter? I can't use terminal on my own...) Edit: My friend is also running Snow Leopard and demonstrated that the same old shortcut worked on their computer still. So now I'm wondering, why isn't it working on mine? Is there an options somewhere that I accidentally turned off? If so, where is it?