The Collaborative International Dictionary of English v.0.48:
Whimsically \Whim"si*cal*ly\, adv. In a whimsical manner; freakishly. [1913 Webster]WordNet (r) 3.0 (2006):
whimsically adv 1: in a fanciful manner; "the Christmas tree was fancifully decorated" [syn: fancifully, whimsically]