- a complete electrical circuit through which current can flow when a voltage is applied
Compare open circuit
WordReference Random House Unabridged Dictionary of American English © 2026
closed′ cir′cuit, [Elect.]
closed′-cir′cuit, adj.
- Electricitya circuit without interruption, providing a continuous path through which a current can flow. Cf. open circuit.
- 1820–30
Collins Concise English Dictionary © HarperCollins Publishers::
closed circuit n
'closed circuit' also found in these entries (note: many are not synonyms or translations):
CCTV
- circulation
- closed-circuit television
- henry
- open circuit
- vidicon
- monitor
- simulcast