1 A roughly circular line, route, or movement that starts and finishes at the same place.
1.1 British A track used for motor racing, horse racing, or athletics.
2 An established itinerary of events or venues used for a particular activity, typically involving sport or public performance.
2.1 A series of athletic exercises performed consecutively in one training session.
2.2 A regular journey made by a judge around a particular district to hear cases in court.
2.3 A district administered or formerly administered by travelling judges.
2.4 A group of local Methodist Churches forming an administrative unit.
2.5 A chain of theatres or cinemas under a single management.
3 A complete and closed path around which a circulating electric current can flow.
3.1 A system of electrical conductors and components forming an electrical circuit.
Late Middle English via Old French from Latin circuitus, from circuire, variant of circumire ‘go round’, from circum ‘around’ + ire ‘go’.
Sid's seventh grade science students studied simple circuits
during several classroom sessions.
Words are a game. Sometimes I play alone, but you are welcome to play, too.