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Definition of 'activate'


  1. put in motion or move to act; "trigger a reaction"; "actuate the circuits"
       Synonyms: trip actuate trigger set off spark off spark trigger off touch off
  2. make active or more active; "activate an old file"
       Antonyms: inactivate deactivate
  3. make more adsorptive; "activate a metal"
  4. aerate (sewage) so as to favor the growth of organisms that decompose organic matter
       Synonyms: aerate
  5. make (substances) radioactive

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