Pop up dictionary is most awaited feature among students. I have some app like quick dictionary which when enabled, gives meaning of the word copied in the small pop up that appear in the bottom of the screen.

I think it would be very helpful if Adobe's PDF reader includes this feature. Everyone would be thankful including me for this to Adobe.

You can add meaning option also in the options that come when the word is selected.

Thanks in advance. Kindly notify me if Adobe is already working on it.