I'm not sure I fully understand your suggestion, but I think we have this feature covered already in the 4.0 software release (not quite released yet, but should be available any day...hopefully!)
If you have a strongs-based Bible loaded (i.e. KJVS, or NASS) then tapping a word will bring up it's strongs definition. If you have a strongs-based dictionary loaded, i.e. TGD (Thayer's) or BDB (Brown, Driver, Briggs') it's definition will also be available with a single tap.
In the new "Analyze Verse" section you can tap on a word and look up that word in any dictionary.