alarm
/əˈlɑːm//əˈlɑɹm/noun
Definitions
A summons to arms, as on the approach of an enemy.
Any sound or information intended to give notice of approaching danger; a warning sound to arouse attention; a warning of danger.
A sudden attack; disturbance.
Sudden surprise with fear or terror excited by apprehension of danger; in the military use, commonly, sudden apprehension of being attacked by surprise.
verb
Definitions
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.