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tr.v. ac·ti·vat·ed, ac·ti·vat·ing, ac·ti·vates
1. To set in motion; make active or more active.
2. To organize or create (a military unit, for example): activate the National Guard.
3. To treat (sewage) with aeration and bacteria to aid decomposition.
4. Chemistry To accelerate a reaction in, as by heat.
5. Physics To make (a substance) radioactive.
6. Biology To convert (a molecule or cell) into a form that carries out a specific action: activate an enzyme; activate B cells.

ac′ti·va′tion n.
ac′ti·va′tor n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.activated - (of sewage) treated with aeration and bacteria to aid decompositionactivated - (of sewage) treated with aeration and bacteria to aid decomposition
treated - subjected to a physical (or chemical) treatment or action or agent; "the sludge of treated sewage can be used as fertilizer"; "treated timbers resist rot"; "treated fabrics resist wrinkling"
2.activated - (of e.g. a molecule) made reactive or more reactive
natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"
reactive - participating readily in reactions; "sodium is a reactive metal"; "free radicals are very reactive"
3.activated - rendered activeactivated - rendered active; e.g. rendered radioactive or luminescent or photosensitive or conductive
active - exerting influence or producing a change or effect; "an active ingredient"
4.activated - (military) set up and placed on active assignment; "a newly activated unit"
armed forces, armed services, military, military machine, war machine - the military forces of a nation; "their military is the largest in the region"; "the military machine is the same one we faced in 1991 but now it is weaker"
active - engaged in full-time work; "active duty"; "though past retirement age he is still active in his profession"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Activated alumina process is one of the most prevalently used adsorption methods for the defluoridation of drinking water.
Summary: Activated alumina process is one of the most prevalently used adsorption methods for the defluoridation of drinking water.
Once activated, an Ooredoo Passport instantly provides 1Gb of roaming data and 100 minutes, letting customers stay connected to friends and family while travelling.
M2 PRESSWIRE-June 19, 2019-: Global Activated Carbon Market 2019-2025: Size, Share & Trends Analysis & Outlook
Activated charcoal may be able to assist kidney function by filtering out undigested toxins and drugs.
Kouther visited Davao in March and met with local manufacturers of coco shell charcoals, activated carbon and other coconut products.
I read that New York recently banned something called activated charcoal from all food and beverages.
-- As one of the fastest-growing oral care companies in the U.S., Hello Products continues to expand its naturally friendly range of best-selling activated charcoal products.
Sialkot -- Police on Sunday registered cases against 10 accused who activated their bricks kilns as the government imposed ban to activated bricks kilns in winter season due to smog.
The FineVine Activated Charcoal Mud Mask is one of the latest facial and body masks on the market, and it promises to deliver a very good experience and value.
'Thirty percent nung 42,000 barangays na yun ay hindi activated yung BADAC, at kung activated man ay non-functional.