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WordReference Random House Learner's Dictionary of American English © 2024ac•ti•vate /ˈæktəˌveɪt/USA pronunciation v. [~ + object], -vat•ed, -vat•ing. - to make active; cause to function or act: Pushing the switch activates the car alarm.
- Militaryto place (a military unit) on an active status:activated the national guard unit.
ac•ti•va•tion /ˌæktəˈveɪʃən/USA pronunciation n. [uncountable]ac•ti•va•tor, n. [countable]See -act-. WordReference Random House Unabridged Dictionary of American English © 2024ac•ti•vate (ak′tə vāt′),USA pronunciation v.t., -vat•ed, -vat•ing. - to make active;
cause to function or act. - Physics
- to render more reactive;
excite:to activate a molecule. - to induce radioactivity.
- Chemistryto aerate (sewage) in order to accelerate decomposition of impure organic matter by microorganisms.
- Chemistry
- to make (carbon, a catalyst, molecules, etc.) more active.
- Chemistryto hasten (reactions) by various means, as heating.
- Militaryto place (a military unit or station) on an active status in an assigned capacity.
ac′ti•va′tion, n. - 1.See corresponding entry in Unabridged . actuate, start, turn on, set going.
- 1.See corresponding entry in Unabridged . stop, halt, check.
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