/əˈlɑːm/
noun
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.A mechanical device for awaking people, or rousing their attention.An instance of an alarm ringing, beeping or clanging, to give a noise signal at a certain time.verb
To call to arms for defenseTo give (someone) notice of approaching dangerTo 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.