What keystrokes are necessary to get the dictionary widget to expand so that you can see all of the definition info without having to resort to the scroll bar? There is a key stroke which automatically sets the window size to the entry researched. Can't remember what it is.
iMac Line (2012 and Later)
Try moving the cursor to the middle of the bottom of the window and carefully move it until you get a double up/down arrow. Click and hold and you should be able to make the window larger/smaller.
It took a little doing, but I succeeded. FYI, there is also a keystroke option that was told to me on an Apple Support call. It was a little arcane, which is why I forgot it and that prompted my question in the first place. If I find out what it is, I'll post it here. I have an appointment at an Apple Store this week to service my iMac, so I'll ask them.
Resizing the Dictionary Widget
