happily in WordNet English dictionary

1. in a joyous manner
   "they shouted happily"
   happily  merrily  mirthfully  gayly  blithely  jubilantly  happily  merrily  mirthfully  gayly  blithely  jubilantly 
   
2. in an unexpectedly lucky way
   "happily he was not injured"
   happily  happily