A button in a critical system (such as a nuclear weapons system) used to quickly activate an extreme measure to mitigate an emergency situation.

Taking the gunner's chair, Ryan quickly activated the front missile pod and tracking system.

He ran to a control pad that was mounted on a nearby wall and quickly activated the lab's emergency backup lights.

With a confidence born of self-assurance and ignorance, Varis quickly activated the thrusters.

He accessed a nausea suppression program and quickly activated it.

He quickly activated a special radio frequency, calling in a "mass casualty incident."

He quickly activated it and ran a basic diagnostic, confirming its operation.

He quickly activated all the various equipment that monitored the conditions within the environmental chamber.

B'Elanna watched as Seven disconnected with the console, then quickly activated it, watching the screen.

So, undeterred by any fear that law-abiding folks just might be able to protect themselves, vicious criminal minds would quickly activate bold new plans here.