Definition of Excess Jurisdiction
Such exists where a court, having jurisdiction of persons and subject matter of the case before it, exceeds its power in trial of such case by dealing with matters about which it is without power or authority to act; and error in court’s ruling is not synonymous with ruling in excess of jurisdiction. Robrock v. Robrock, 105 Ohio App. 25, 151 N.E.2d 234, 239.
That's the definition of Excess Jurisdiction in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.