contingent in WordNet English dictionary

1. a temporary military unit
   "the peacekeeping force includes one British contingent"
   contingent  detail 
   
2. a gathering of persons representative of some larger group
   "each nation sent a contingent of athletes to the Olympics"
   contingent 
   

1. determined by conditions or circumstances that follow
   "arms sales contingent on the approval of congress"
   contingent  contingent on  contingent upon  dependent on  dependant on  dependent upon  dependant upon  depending on 
   
2. possible but not certain to occur
   "they had to plan for contingent expenses"
   contingent 
   
3. uncertain because of uncontrollable circumstances
   "the results of confession were not contingent, they were certain"- George Eliot
   contingent