circuit

Concise Oxford English Dictionary © 2008 Oxford University Press:
circuit/ˈsɜːkɪt/

▶noun

• 1 a roughly circular line, route, or movement.

• 2 Brit. a track used for motor racing, horse racing, or athletics.

• 3 a system of electrical conductors and components forming a complete path around which an electric current can flow.

• 4 an established series of sporting events or entertainments.

  ■ a series of athletic exercises performed in one training session.

  ■ a regular journey by a judge around a district to hear court cases.

• 5 a group of Methodist Churches forming an administrative unit.

▶verb move all the way around.

– origin ME: via OFr. from L. circuitus, from circuire, var. of circumire ‘go round’.