butterfly in WordNet English dictionary

1. a swimming stroke in which the arms are thrown forward together out of the water while the feet kick up and down
   butterfly  butterfly stroke 
   
2. diurnal insect typically having a slender body with knobbed antennae and broad colorful wings
   butterfly 
   

1. talk or behave amorously, without serious intentions
   "The guys always try to chat up the new secretaries"; "My husband never flirts with other women"
   chat up  flirt  dally  butterfly  coquet  coquette  romance  philander  mash 
   
2. cut and spread open, as in preparation for cooking
   "butterflied shrimp"
   butterfly 
   
3. flutter like a butterfly
   butterfly