invoke in WordNet English dictionary

1. request earnestly (something from somebody); ask for aid or protection
   "appeal to somebody for help"; "Invoke God in times of trouble"
   appeal  invoke 
   
2. cite as an authority; resort to
   "He invoked the law that would save him"; "I appealed to the law of 1900"; "She invoked an ancient law"
   invoke  appeal 
   
3. summon into action or bring into existence, often as if by magic
   "raise the specter of unemployment"; "he conjured wild birds in the air"; "call down the spirits from the mountain"
   raise  conjure  conjure up  invoke  evoke  stir  call down  arouse  bring up  put forward  call forth