(1) The legal authority of a court to hear and decide a case. Concurrent jurisdiction exists when two courts have simultaneous responsibility for the same case. Some issues can be heard in both state and federal courts. The plaintiff initially decides where to bring the suit, but in some cases, the defendant can seek to change the court. (2) The geographic area over which the court has authority to decide cases. A federal court in one state, for example, can usually only decide a case that arose from actions in that state.