Source : Webster's Revised Unabridged Dictionary (1913)

Densely \Dense"ly\, adv.
   In a dense, compact manner.

Source : WordNet®

densely
     adv 1: in a stupid manner; "he had so rapaciously desired and so
            obtusely expected to find her alone" [syn: {dumbly}, {obtusely}]
     2: in a concentrated manner; "old houses are often so densely
        packed that perhaps three or four have to be demolished
        for every new one built"; "a thickly populated area" [syn:
         {thickly}] [ant: {thinly}]