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activate

[ak-tuh-veyt] /ˈæk təˌveɪt/
verb (used with object), activated, activating.
1.
to make active; cause to function or act.
2.
Physics.
  1. to render more reactive; excite:
    to activate a molecule.
  2. to induce radioactivity.
3.
to aerate (sewage) in order to accelerate decomposition of impure organic matter by microorganisms.
4.
Chemistry.
  1. to make (carbon, a catalyst, molecules, etc.) more active.
  2. to hasten (reactions) by various means, as heating.
5.
to place (a military unit or station) on an active status in an assigned capacity.
Origin
1620-1630
1620-30; active + -ate1
Related forms
activation, noun
nonactivation, noun
overactivate, verb (used with object), overactivated, overactivating.
superactivate, verb (used with object), superactivated, superactivating.
unactivated, adjective
Can be confused
activate, actuate, stimulate.
Synonyms
1. actuate, start, turn on, set going.
Antonyms
1. stop, halt, check.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for activated
  • Another teller activated a silent alarm to alert the police.
  • Later, other scientists and the public should also be activated to prohibit them.
  • First he made haphazard tangles of fibers activated by charged liquids.
  • It consumes power only when the electronic paper is activated.
  • Hawkings computer allowed him to select letters and words but it was activated by his physical movement.
  • Porphyrins are light-activated chemicals that can be used to combat ills including tumors and diseases of the eye.
  • If this is recorded then warning systems can sometimes be activated to evacuate people.
  • And when a bone breaks, cells are activated to repair the damage.
  • The seniors activated several frontal brain regions that the others did not.
  • They can only be activated in females after puberty.
British Dictionary definitions for activated

activate

/ˈæktɪˌveɪt/
verb (transitive)
1.
to make active or capable of action
2.
(physics) to make radioactive
3.
(chem)
  1. to increase the rate of (a reaction)
  2. to treat (a substance, such as carbon or alumina) so as to increase powers of adsorption
4.
(physiol) to prepare by arousal (the body or one of its organs (e.g. the brain)) for action
5.
to purify (sewage) by aeration
6.
(US, military) to create, mobilize, or organize (a unit)
Derived Forms
activation, noun
activator, 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 activated

activate

v.

1620s; see active + -ate (2). Related: Activated; activating.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for activated

activated

adjective

Intoxicated by alcohol; tipsy: They got a little activated after their team lost in the Elite 8


The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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