verb (used with object), ac·ti·vat·ed, ac·ti·vat·ing.
- to render more reactive; excite: to activate a molecule.
- to induce radioactivity.
- to make (carbon, a catalyst, molecules, etc.) more active.
- to hasten (reactions) by various means, as heating.
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Example sentences from the Web for activated
The fMRI scan measures blood flow in the brain, and can sense when certain areas are activated.Welcome to Generation Overshare: Lena Dunham, Taylor Swift, and the Politics of Self-Disclosure|Marlow Stern|November 6, 2014|DAILY BEAST
As for the claims that activated charcoal will help purify your body from toxins?
Some natural health practitioners also say activated charcoal can be useful to treat minor digestive issues.
The volcanic chain was activated, we were told, expecting to see cataclysmic explosions at any moment.In Nicaragua Earthquakes and Politics Play Hell With Holy Week|Monica Seoane|April 18, 2014|DAILY BEAST
Moments later, he activated a landmine, resulting in his death, leaving those color images as his final photographs.
Baggage need not be opened, providing its spyproofing was not activated.Legacy|James H Schmitz
The other end had to be placed in proximity to another atomic power source, and activated.Keep Your Shape|Robert Sheckley
Commander Benedict kept his eyes on the rear plate as he activated the intercom.Time Fuze|Gordon Randall Garrett
Power purred along a network of lines, activated beams, turned off and on a series of fixtures in those coffin-beds.The Defiant Agents|Andre Alice Norton
He spun his chair about, activated the large entertainment screen, and spent some time watching a playlet.Final Weapon|Everett B. Cole
British Dictionary definitions for activated
- to increase the rate of (a reaction)
- to treat (a substance, such as carbon or alumina) so as to increase powers of adsorption