event in WordNet English dictionary

1. a special set of circumstances
   "in that event, the first possibility is excluded"; "it may rain in which case the picnic will be canceled"
   event  case 
   
2. a phenomenon that follows and is caused by some previous phenomenon
   "the magnetic effect was greater when the rod was lengthwise"; "his decision had depressing consequences for business"; "he acted very wise after the event"
   consequence  effect  outcome  result  event  issue  upshot 
   
3. something that happens at a given place and time
   event 
   
4. a phenomenon located at a single point in space-time; the fundamental observational entity in relativity theory
   event