perhaps this is what you are referring to:
1. select menu button (bottom right of screen, looks like a wifi symbol)
2. select settings (rightmost menu icon)
3. select dictionary (if you don't see dictionary, you may be in another screen, press top left button repeatedly to get to main settings page)
4. select "entry commands"
5. select "copy to pasteboard"
this will allow you to copy dictionary definitions with just one press of a button...