alarm

1. (transitive) To call to arms for defense.transitive

2. (transitive) To give (someone) notice of approaching danger or necessary action; to rouse to vigilance; to put on the alert.Examples: "The sudden drop in temperature should alarm you into taking precautions."; "Her illness started to alarm the doctors, who ordered more tests."; "When the carriage drew up in the grass-grown court yard before the hall-door, two lazy-looking men, whose appearance well accorded with that of the place which they tenanted, alarmed by the obstreperous barking of a great chained dog, ran out from some half-ruinous out-houses, and took charge of the horses; […]"transitive

3. (transitive, of a device) To produce a warning of approaching danger or necessary action; to emit a signal intended to rouse a recipient to vigilance or put them on the alert.Examples: "The tower cab supervisor and various pilots stated that the LLWAS system frequently alarms because of the thunderstorm activity present, and that airspeed losses are common as a result of convective wind shear."transitive

4. (transitive) To surprise with apprehension of danger; to fill with anxiety in regard to threatening evil; to excite with sudden fear.Examples: "The loud bang in the hallway seemed to alarm everyone in the building."transitive

5. (transitive) To keep in excitement; to disturb.transitive