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  • switch-off
    switch-off
    noun
    the act or process of switching off a power supply, light source, appliance, etc.
  • switch off
    switch off
    verb
    to cause (a device) to stop operating by or as if by moving a switch, knob, or lever; turn off
Synonyms

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

After the switch-off point, geomagnetic storms became less extreme and followed a 27-day pattern.

From Science Daily Jul. 21, 2026

"Every start and switch-off of the engine counts as one cycle," he explained.

From BBC Jun. 19, 2025

Fuel poverty campaigners said the switch-off process had been "doomed to failure" after it became clear that the 30 June deadline was "simply unachievable".

From BBC Jun. 18, 2025

The research team found the switch-off protein using advanced technology predicting unknown proteins.

From Science Daily Apr. 29, 2024

"With a switch-off from automatic if they should fail."

From What Need of Man? by Calin, Harold

Users will be able to switch off these settings, however, with critics saying they would be ineffective.

From Barron's Jul. 14, 2026

"It's something which you can never switch off from," says his mum Vicky.

From BBC Jun. 22, 2026

In the new study, researchers used genome editing to switch off the gene responsible for producing dihydroflavonol 4-reductase, an enzyme involved in a critical step just before anthocyanins are formed in red lettuce.

From Science Daily Jun. 15, 2026

New RNA-based drugs target the genetic instructions inside cells to lower cholesterol or blood pressure, while therapies based on Crispr, a gene-editing technology, will permanently switch off genes that drive heart disease.

From The Wall Street Journal Jun. 14, 2026

Someone broke into your house after you’d been kind enough to switch off the burglar alarm?

From "Inkheart" by Cornelia Funke

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