1. to turn off or disable something, especially a device, system, or feature
You can deactivate your account at any time.
Você pode desativar sua conta a qualquer momento.
2. to make something inactive or non-functional
The security system was deactivated during maintenance.
O sistema de segurança foi desativado durante a manutenção.
3. in chemistry, to reduce or remove the activity of a substance
Heat can deactivate certain enzymes.
O calor pode desativar certas enzimas.