To call to arms for defense

To give (someone) notice of approaching danger

To rouse to vigilance and action; to put on the alert.

To surprise with apprehension of danger; to fill with anxiety in regard to threatening evil; to excite with sudden fear.

To keep in excitement; to disturb.

Having an alarm fitted.

"This door is alarmed."

Worried; anxious; panicky.

"I'm extremely alarmed about the army outside my house."