possibly in WordNet English dictionary

1. by chance
   "perhaps she will call tomorrow"; "we may possibly run into them at the concert"; "it may peradventure be thought that there never was such a time"
   possibly  perchance  perhaps  maybe  mayhap  peradventure  possibly  perchance  perhaps  maybe  mayhap  peradventure 
   
2. to a degree possible of achievement or by possible means
   "they can't possibly get here in time for the funeral?"
   possibly  possibly