Original: Jurisdiction (from the Latin ius, iuris meaning "law" and dicere meaning "to speak") is the practical authority granted to a formally constituted legal body or to a political leader to deal with and make pronouncements on legal matters and, by implication, to administer justice within a defined area of responsibility.
Simplified: It also includes the authority a of formally constituted legal body or a political leader to deal with legal matters and, by implication, to administer justice within a defined area of responsibility.