Source : Webster's Revised Unabridged Dictionary (1913)

Royally \Roy"al*ly\, adv.
   In a royal or kingly manner; like a king; as becomes a king.

         His body shall be royally interred.      --Dryden.

Source : WordNet®

royally
     adv : in a royal manner; "they were royally treated" [syn: {like
           kings}, {like royalty}]