closed circuit
Unbroken electrical loop
A closed circuit is an electrical pathway that forms a complete loop, allowing current to flow.
The term extends to television systems where signals are transmitted to a limited set of receivers rather than broadcast publicly: The store monitors customers via closed-circuit TV.
Figuratively, something operating in a closed circuit is self-contained or restricted to insiders.
Curve closing on itself
- currentDirected flow of charge
- conductorOne who directs musicians
- resistorCurrent-limiting circuit element
- ammeterElectrical flow gauge
voltmeter · ohmmeter · breaker · fuse · diode · capacitor · inductor · transformer
Limited in scope
- privateRestricted to certain parties
- members-onlyRestricted to enrolled participants
- limitedRestricted in extent
- selectiveChoosing with care
insider · VIP · confidential · access · controlled · gated · clearance · privileged
Closed to prevent entry
- containedKept within limits
- self-containedWhole without external parts
- insulatedShielded from heat loss
- hermeticImpenetrably closed off
recirculating · independent · autonomous · internal · barrier · boundary · separation · cut-off
loop
Curve closing on itself
- currentDirected flow of charge
- conductorOne who directs musicians
- resistorCurrent-limiting circuit element
ammeter · voltmeter · ohmmeter · breaker · fuse · diode · capacitor · inductor · transformer · grounding
restricted
Limited in scope
- privateRestricted to certain parties
- members-onlyRestricted to enrolled participants
- limitedRestricted in extent
selective · insider · VIP · confidential · access · controlled · gated · clearance · privileged · secure
sealed
Closed to prevent entry
- containedKept within limits
- self-containedWhole without external parts
- insulatedShielded from heat loss
hermetic · recirculating · independent · autonomous · internal · barrier · boundary · separation · cut-off · encapsulation
CCTV
Surveillance camera network
- camerasVisual recording devices
- monitoringOngoing observation of something
- securityProtection from threat
recording · footage · feed · watchman · guards · patrol · detection · sensors · access control · intrusion
broadcast
Transmitted media signal
- transmissionSending of information
- networkInterconnected system
- channelPassage for transmission
receiver · antenna · cable · satellite · telecast · program · signal · feed · studio · production
closed circuitopen circuit
Incomplete electrical loop
public broadcast · broadcast · broadcast television · public access · open system
closet, circuit, closed, closing, closer, disclose, closure, closest, enclosure