ETYM French circuit, from Latin circuitus, from circuire or circumire to go around; circum around + ire to go.
1. A usually circular line encompassing an area.
2. The space enclosed within such a line.
3. A course around a periphery.
4. A circuitous or indirect route.
5. A regular tour (as by a traveling judge or preacher) around an assigned district or territory.
6. the route traveled.
7. A group of church congregations ministered to by one pastor.

A path for electrical current to flow; SYN. electrical circuit, electric circuit.
1. Any path that can carry electrical current.
2. A combination of electrical components interconnected to perform a particular task. At one level, a computer consists of a single circuit; at another, it consists of hundreds of interconnected circuits.
In physics or electrical engineering, an arrangement of electrical components through which a current can flow. There are two basic circuits, series and parallel. In a series circuit, the components are connected end to end so that the current flows through all components one after the other. In a parallel circuit, components are connected side by side so that part of the current passes through each component. A circuit diagram shows in graphical form how components are connected together, using standard symbols for the components.