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switch-off

American  
[swich-awf, -of] / ˈswɪtʃˌɔf, -ˌɒf /

noun

  1. the act or process of switching off a power supply, light source, appliance, etc.

switch off British  

verb

  1. to cause (a device) to stop operating by or as if by moving a switch, knob, or lever; turn off

  2. informal to cease to interest or be interested; make or become bored, alienated, etc

"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
switch off Idioms  

  1. Stop paying attention, lose interest, as in Whenever he starts in on economics, I switch off automatically. This metaphoric expression transfers turning off a light switch or similar device to diverting one's attention. [c. 1860] Also see switch on.

Etymology

Origin of switch-off

Noun use of verb phrase switch off

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.