(idiomatic) Someone with the roles of judge, jury and executioner; someone with full power to judge and punish others unilaterally.

plural of judge, jury and executioner

(law, historical) A jury for the trial of a foreigner, composed equally of citizens and aliens.

(law) The theoretical study of law. / (law) Case law, or the body of case law regarding a certain subject.

The power, right, or authority to interpret and apply the law. / The power or right to exercise authority. / The power or right to perform some action as part of applying the law.

(Roman and civil law) A person authorised to give legal advice. / (civil law) A master of civil law. Abbreviation: J.C. / (law) A master of jurisprudence. / (law) Someone who has studied law.

(law) An expert of law or someone who researches jurisprudence. / (US, Canada, law) A judge.

(US, law) The authority that a United States federal court has to hear a cause of action brought under the United States Constitution or federal statutes.

(law) 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.

(law) In the law of civil procedure, the ability of a court to hear a case based on the authority granted to the court to hear that particular type of case.