What is "personal jurisdiction"

n. (context legal English) in the law of civil procedure, the ability of a court to hear a case brought against a party stemming from that party's presence, activities, or contacts within a specified set of geographical boundaries, usually the borders of a county, state, or nation.

Personal jurisdiction is a court's jurisdiction over the parties to a lawsuit, as opposed to subject-matter jurisdiction, which is jurisdiction over the law and facts involved in the suit. If a court does not have personal jurisdiction over a party, its rulings or decrees cannot be enforced upon that party, except by comity; i.e., to the extent that the sovereign having jurisdiction over the party allows the court to enforce them upon that party. A court that has personal jurisdiction has both the authority to rule on the law and facts of a suit and the power to enforce its decision upon a party to the suit. In some cases, territorial jurisdiction may also constrain a court's reach, such as preventing hearing of a case concerning events occurring on foreign territory between two citizens of the home jurisdiction.