The Collaborative International Dictionary of English v.0.48:
Royally \Roy"al*ly\, adv. In a royal or kingly manner; like a king; as becomes a king. [1913 Webster] His body shall be royally interred. --Dryden. [1913 Webster]WordNet (r) 3.0 (2006):
royally adv 1: in a royal manner; "they were royally treated" [syn: royally, like kings, like royalty]