contingent

a gathering of persons representative of some larger group; "each nation sent a contingent of athletes to the Olympics"

a temporary military unit; "the peacekeeping force includes one British contingent"

possible but not certain to occur; "they had to plan for contingent expenses"

determined by conditions or circumstances that follow; "arms sales contingent on the approval of congress"

uncertain because of uncontrollable circumstances; "the results of confession were not contingent, they were certain"- George Eliot