[alarm] also ala.rum n [ME alarme, alarom, fr. MF alarme, fr. OIt all'arme, lit., to the arms] (14c) 1 usu alarum, archaic: a call to arms "the angry trumpet sounds alarum --Shak."
2: a signal (as a loud noise or flashing light) that warns or alerts; also: a device that signals "set the ~ to wake me at seven"
3: sudden sharp apprehension and fear resulting from the perception of imminent danger
4: a warning notice syn see fear
[2]alarm also alarum vt (1605) 1: disturb, excite
2: to give warning to
3: to strike with fear -- alarm.ing.ly adv