summon in WordNet English dictionary

1. call in an official matter, such as to attend court
   summon  summons  cite 
   
2. gather or bring together
   "muster the courage to do something"; "she rallied her intellect"; "Summon all your courage"
   muster  rally  summon  come up  muster up 
   
3. make ready for action or use
   "marshal resources"
   mobilize  mobilise  marshal  summon 
   
4. ask to come
   "summon a lawyer"
   summon