circuit ( circuits plural )
1 n-count An electrical circuit is a complete route which an electric current can flow around.
Any attempts to cut through the cabling will break the electrical circuit.
2 n-count A circuit is a series of places that are visited regularly by a person or group, especially as a part of their job.
usu supp N
It's a common problem, the one I'm asked about most when I'm on the lecture circuit.
3 n-count A racing circuit is a track on which cars, motorbikes, or cycles race.
4 n-count A circuitof a place or area is a journey all the way round it. FORMAL usu N of n She made a slow circuit of the room.
circuit board ( circuit boards plural ) A circuit board is the same as a printed circuit board. n-count
circuit breaker ( circuit breakers plural ) , circuit-breaker A circuit breaker is a device which can stop the flow of electricity around a circuit by switching itself off if anything goes wrong. n-count
There is an internal circuit breaker to protect the instrument from overload.
Circuit training is a type of physical training in which you do a series of different exercises, each for a few minutes. n-uncount
closed-circuit , closed circuit
A closed-circuit television or video system is one that operates within a limited area such as a building. adj ADJ n
There's a closed-circuit television camera in the reception area.
integrated circuit ( integrated circuits plural ) An integrated circuit is a very small electronic circuit printed on a single silicon chip. (TECHNICAL) n-count
printed circuit board ( printed circuit boards plural ) A printed circuit board is an electronic circuit in which some of the parts and connections consist of thin metal lines and shapes on a thin board. (TECHNICAL) n-count
short-circuit ( short-circuits 3rd person present) ( short-circuiting present participle) ( short-circuited past tense & past participle )
1 verb If an electrical device short-circuits or if someone or something short-circuits it, a wrong connection or damaged wire causes electricity to travel along the wrong route and damage the device.
Carbon dust and oil build up in large motors and cause them to short-circuit... V
Once inside they short-circuited the electronic security. V n
Short-circuit is also a noun., n-count
The fire was started by an electrical short-circuit.
2 verb If someone or something short-circuits a process or system, they avoid long or difficult parts of it and use a quicker, more direct method to achieve their aim.
The approach was intended to short-circuit normal complaints procedures. V n