Ancillary jurisdiction allows a federal court to hear a claim that would normally be outside of its subject-matter jurisdiction if it is substantially related to a second claim that is within the court's jurisdiction. A claim comes within a federal court’s ancillary jurisdiction when it bears a logical relationship to the aggregate core of operative facts of the main claim, and the main claim meets the requirements of federal question jurisdiction or diversity jurisdiction.
Definition from Nolo’s Plain-English Law Dictionary
A term used in federal courts for when the court takes control of matters not normally under federal jurisdiction so that it can give a judgment on the entire controversy, part of which is a federal matter that it is authorized by law to determine. (See also: pendent jurisdiction
Definition provided by Nolo’s Plain-English Law Dictionary.
August 19, 2010, 5:11 pm