1. (noun)activation stimulation of activity in an organism or chemical Synonyms: energizing, activating Antonyms: inactivation, deactivation, defusing
2. (noun)energizing, activating, activation the activity of causing to have energy and be active Synonyms: activation, energizing, activating Antonyms: defusing, inactivation, deactivation
3. (noun)activation making active and effective (as a bomb) Synonyms: energizing, activating Antonyms: defusing, inactivation, deactivation