interrupter

or in·ter·rup·tor

[ in-tuh-ruhp-ter ]
/ ˌɪn təˈrʌp tər /

noun

a person or thing that interrupts.
Electricity. a device for interrupting or periodically opening and closing a circuit, as in a doorbell.

Origin of interrupter

First recorded in 1505–15; interrupt + -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for interrupter

interrupter

interruptor

/ (ˌɪntəˈrʌptə) /

noun

a person or thing that interrupts
an electromechanical device for opening and closing an electric circuit
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012