What is Writ Of Certiorari?

Legal Definition
A type of writ, meant for rare use, by which an appellate court decides to review a case at its discretion. The word certioari comes from Law Latin and means "to be more fully informed." A writ of certiorari orders a lower court to deliver its record in a case so that the higher court may review it. The U.S. Supreme Court uses certiorari to pick most of the cases that it hears.
Legal Definition
Writ of the appellate court responding to a request for the review of a lower court.
Legal Definition
-- Ballentine's Law Dictionary