What is the meaning of activating?

noun

• The activity of causing to have energy and be active.
  • synonyms: energizing, activation

verb

• Put in motion or move to act.
  • usage: "trigger a reaction"; "actuate the circuits"
  • synonyms: trip, actuate, trigger, activate, set off, spark off, spark, trigger off, touch off
• Make active or more active.
  • usage: "activate an old file"
  • synonyms: activate
• Make more adsorptive.
  • usage: "activate a metal"
  • synonyms: activate
• Aerate (sewage) so as to favor the growth of organisms that decompose organic matter.
  • synonyms: activate, aerate
• Make (substances) radioactive.
  • synonyms: activate

adjective

• Causing motion or action or change.
  • synonyms: actuating