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English definition of “circuit”

circuit

noun [C] (CLOSED SYSTEM)    /ˈsɜː.kɪt/ US  /ˈsɝː-/
C2 a closed system of wires or pipes through which electricity or liquid can flow : A defect was found in the water-cooling/ electrical circuit.Electrical components and circuitry
(Definition of circuit noun (CLOSED SYSTEM) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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