1. Stimulation of activity in an organism or chemical 
2. The activity of causing to have energy and be active
   - energizing, activating, energising [Brit] 
3. Making active and effective (as a bomb)

Derived forms: activations

See also: activate

Type of: activity, beginning, commencement, start, stimulation

Antonym: deactivation, inactivation

Encyclopedia: Activation

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