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deactivate

[dee-ak-tuh-veyt] /diˈæk təˌveɪt/
verb (used with object), deactivated, deactivating.
1.
to cause to be inactive; remove the effectiveness of.
2.
to demobilize or disband (a military unit).
3.
to render (a bomb, shell, or the like) inoperative, especially by disconnecting, removing, or otherwise interfering with the action of the fuze.
4.
Chemistry. to render (a chemical, enzyme, catalyst, etc.) inactive.
verb (used without object), deactivated, deactivating.
5.
Physical Chemistry. to lose radioactivity.
Origin
1900-1905
1900-05; de- + activate
Related forms
deactivation, noun
deactivator, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for deactivate
  • Also remove or deactivate social networking accounts you no longer use.
  • The column allows you to select multiple students to delete or deactivate.
  • Though a deterrent to the average shoplifter, apparently some have discovered ways to deactivate these devices.
  • Before resuming motion, the driver shall deactivate these lights and allow congested traffic to disperse where practicable.
  • In response, plants produce a variety of enzymes that deactivate the oxidants.
British Dictionary definitions for deactivate

deactivate

/diːˈæktɪˌveɪt/
verb
1.
(transitive) to make (a bomb, etc) harmless or inoperative
2.
(intransitive) to become less radioactive
3.
(transitive) (US) to end the active status of (a military unit)
4.
(chem) to return or cause to return from an activated state to a normal or ground state
Derived Forms
deactivation, noun
deactivator, noun
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
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Word Origin and History for deactivate
v.

1904, from de- + activate. Related: Deactivated; deactivating; deactivation.

Online Etymology Dictionary, © 2010 Douglas Harper
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