activate

verb

1. (transitive)To encourage development or induce increased activity; to stimulate.

   “activate the economy”

2. (transitive)To put a device, mechanism (alarm etc.) or system into action or motion; to trigger, to actuate, to set off, to enable.

   “The pranksters activated the fire alarm by spraying deodorant next to it.”

3. (transitive)To render more reactive; excite.
4. (transitive)To render a molecule reactive, active, or effective in performing its function.
5. (transitive)To render a substance radioactive.
6. (transitive)To hasten a chemical reaction, especially by heating.
7. (transitive)To remove the limitations of demoware by providing a license; to unlock.
8. (transitive)To aerate in order to aid decomposition of organic matter.
9. (transitive)To organize or create a military unit or station.

   “A new squadron was activated.”

10. (transitive)To bring a player back after an injury.