1
- a roughly circular line, route, or movement that starts and finishes at the same place环线; 环道; 环行：
I ran a circuit of the village.
我绕村子跑了个环线。
1.1
- Brit. a track used for motor racing, horse racing, or athletics〈英〉（赛车、赛马、田径运动的）车道; 跑道。
1.2
- a complete and closed path around which a circulating electric current can flow电路, （电的）回路, 线路。
1.3
- a system of electrical conductors and components forming such a path（电导体、组件构成的）电路系统。
2
- an established itinerary of events or venues used for a particular activity, typically involving public performance巡回活动; 巡回活动集会地（尤指巡回公演剧场）：
the alternative cabaret circuit.
作为替补的卡巴莱歌舞巡回表演。
2.1
- a series of sporting events in which the same players regularly take part（系列运动项目中同一运动员们经常参加的）巡回赛, 联赛：
his first season on the professional circuit.
他在职业巡回赛的第一个赛季。
2.2
- a series of athletic exercises performed consecutively in one training session（一套）体操动作：
as modifier circuit training.体操训练。
2.3
- (in the UK) a regular journey made by a judge around a particular district to hear cases in court（英国）巡回审判：
as modifier a circuit judge.进行巡回审判的法官。
2.4
- a district of this type巡回审判区。
2.5
- a group of local Methodist Churches forming an administrative unit卫理公会派组织。
2.6
- a chain of theatres or cinemas under a single management统一经营的连锁剧院（或影院）。
with obj.
- move all the way around (a place or thing)绕（地点, 事物）环行：
the trains will follow the Northern line, circuiting the capital.
火车会绕首都沿北线行进。
词源
late Middle English: via Old French from Latin circuitus, from circuire, variant of circumire 'go round', from circum 'around' + ire 'go'.