1. an electrical device that provides a path for electrical current to flow
2. a journey or route all the way around a particular place or area;
"they took an extended tour of Europe"
"we took a quick circuit of the park"
"a ten-day coach circuit of the island"
3. an established itinerary of venues or events that a particular group of people travel to;
"she's a familiar name on the club circuit"
"on the lecture circuit"
"the judge makes a circuit of the courts in his district"
"the international tennis circuit"
4. (law) a judicial division of a state or the United States (so-called because originally judges traveled and held court in different locations); one of the twelve groups of states in the United States that is covered by a particular circuit court of appe