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English definition of “circuit”

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circuit

noun uk   /ˈsɜː.kɪt/ us    /ˈsɝː-/

circuit noun (VISITS)

C2 [C] a regular pattern of visits or the places visited: They first met each other on the tennis circuit (= while at different tennis competitions). He was a familiar figure on the lecture circuit. [C] specialized law a particular area containing different courts that a judge visits: The judge had served for many years on the northeastern Circuit. a circuit judge
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circuit noun (TRACK)

C2 [C] something shaped approximately like a circle, especially a route, path, or sports track that starts and ends in the same place: They test the car tyres on a motor racing circuit. We made a leisurely circuit of the city walls.

circuit noun (CLOSED SYSTEM)

C2 [C] a closed system of wires or pipes through which electricity or liquid can flow: A defect was found in the water-cooling/electrical circuit.
(Definition of circuit from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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