1. Present participle of 'ativar'; the act of turning on, enabling, or putting into action
He is activating the alarm system.
Ele está ativando o sistema de alarme.
2. Making something active or operational; initiating a process or function
She is activating her account on the platform.
Ela está ativando sua conta na plataforma.
3. Stimulating or energizing; bringing to life or increased activity
The medication is activating the immune system.
O medicamento está ativando o sistema imunológico.