What is Circuit Court?

Legal Definition
a court where the authority covers several districts or counties where several judges can preside at the same time with each handling a different case.
Legal Definition
The name of a court of the United States, which has both civil and criminal jurisdiction. In several of the states there are courts which bear this name. Vide Courts of the United States.
-- Bouviers Law Dictionary
Legal Definition
The name of a system of courts of the United States, invested with general original jurisdiction of such matters and causes as are of Federal cognizance, except the matters specially delegated to the district courts. The United States circuit courts are held by one of the justices of the supreme court appointed for the circuit, (and bearing the name, in that capacity, of circuit justice,) together with the circuit judge and the district judge of the district in which they are held. Their business is not only the supervision of trials of issues in fact, but the hearing of causes as a court in banc; and they have equity as well as common-law jurisdiction, together with appellate jurisdiction from the decrees and judgments of the district courts. 1 Kent, Comm. 301-303.

In several of the states, circuit court is the name given to a tribunal, the territorial jurisdiction of which comprises several counties or districts, and whose sessions are held in such counties or districte alternately. These courts usually have general original jurisdiction. In re Johnson, 12 Kan. 102.
-- Black's Law Dictionary
Legal Definition
A court held by a judge or judges at different places in a district. See, also, United States Circuit Court.
-- Ballentine's Law Dictionary
Legal Definition
Circuit court is the name of court systems in several common law jurisdictions.
-- Wikipedia