- to make active; cause to function or act.
- to render more reactive; excite: to activate a molecule.
- to induce radioactivity.
- to aerate (sewage) in order to accelerate decomposition of impure organic matter by microorganisms.
- to make (carbon, a catalyst, molecules, etc.) more active.
- to hasten (reactions) by various means, as heating.
- to place (a military unit or station) on an active status in an assigned capacity.
Origin of activate
SynonymsSee more synonyms on Thesaurus.com
1. actuate, start, turn on, set going.
1. stop, halt, check.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples 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
November 6, 2014
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
April 18, 2014
Moments later, he activated a landmine, resulting in his death, leaving those color images as his final photographs.Capa in Color
January 31, 2014
Nuwell activated it, and they went through it into the big building.Rebels of the Red Planet
Charles Louis Fontenay
When you threw that switch, it sent out an impulse that activated them.
Behind the collapsium shielding, they wouldn't have been activated.
But a machine that ain't been activated has not got any personality.The Machine That Saved The World
William Fitzgerald Jenkins
Baggage need not be opened, providing its spyproofing was not activated.Legacy
James H Schmitz
- to make active or capable of action
- physics to make radioactive
- to increase the rate of (a reaction)
- to treat (a substance, such as carbon or alumina) so as to increase powers of adsorption
- physiol to prepare by arousal (the body or one of its organs (e.g. the brain)) for action
- to purify (sewage) by aeration
- US military to create, mobilize, or organize (a unit)
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
Word Origin and History for activated
Online Etymology Dictionary, © 2010 Douglas Harper