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activate

play
verb ac·ti·vate \ˈak-tə-ˌvāt\

Definition of activate

activated

activating

  1. transitive verb
  2. :  to make active or more active: as a (1) :  to make (as molecules) reactive or more reactive (2) :  to convert (as a provitamin) into a biologically active derivative b :  to make (a substance) radioactive c :  to treat (as carbon or alumina) so as to improve adsorptive properties d (1) :  to set up or formally institute (as a military unit) with the necessary personnel and equipment (2) :  to put (an individual or unit) on active duty

  3. intransitive verb
  4. :  to become active

activation

play \ˌak-tə-ˈvā-shən\ noun

activator

play \ˈak-tə-ˌvā-tər\ noun


Examples of activate in a sentence

  1. Touch the screen to activate the system.

  2. activate and then deactivate a mechanism

  3. The camera is activated by pushing a button.

  4. The bomb was activated by remote control.

  5. Sunlight activates a chemical reaction in the plant's leaves.

  6. vitamins that activate the growth of new cells

  7. The President has activated the reserves.



1626

First Known Use of activate

1626


ACTIVATE Defined for Kids

activate

play
verb ac·ti·vate \ˈak-tə-ˌvāt\

Definition of activate for Students

activated

activating

  1. :  to start working or cause to start working <Activate the alarm.>




Medical Dictionary

activate

play
transitive verb ac·ti·vate \ˈak-tə-ˌvāt\

Medical Definition of activate

activated

;

activating

  1. :  to make active or more active: asa:  to convert into a biologically active derivative or form <activated plasminogen>b:  to make biologically or molecularly active <activate protein synthesis> <The [spinal] cord also contains neuronal circuits …that can be activated by incoming sensory signals without input from the brain …—John W. McDonald et al., Scientific American, September 1999>c:  to make (a substance) radioactive

activation

\ˌak-tə-ˈvā-shən\ play noun




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