1. Call in an official matter, such as to attend court
   "He was summoned to appear before the judge";
   - summons, cite
    
2. Ask to come
   "summon a lawyer"
    
3. Gather or bring together
   "Summon all your courage";
   - muster, rally, come up, muster up
    
4. Cause to become available for use, either literally or figuratively
   "running into an old friend summoned up memories of her childhood";
   - call up
    
5. Make ready for action or use
   "summon resources";
   - mobilize, mobilise [Brit], marshal

Derived forms: summoned, summoning, summons

Type of: call, collect, create, garner, gather, make, pull together, send for

Encyclopedia: Summon