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âshort circuitâ in British English. See all translations. short circuitnoun [ C ] uk â /ËÊÉËt ËsÉË.kÉªt/ us â /ËÊÉËrt ËsÉË.kÉªt/ informal short. âº a bad electrical connection that causes the current to flow in the wrong direction, often having the effect of stopping the power supply.
An electronic device that controls the flow of an electric current and is used as an amplifier or switch. Transistors consist of three layers of semiconductor material connected to an electric circuit.ranÂ·sisÂ·tor. n. 1. A small electronic device containing a semiconductor and having at least three electrical contacts, used in a circuit as an amplifier, detector, or switch. 2. Any of various devices serving the same purpose but employing a different technology: an optical transistor. 3. A transistor radio.