Meaning of alarm

Definition of alarm

(noun) fear resulting from the awareness of danger
a device that signals the occurrence of some undesirable event
an automatic signal (usually a sound) warning of danger
a clock that wakes a sleeper at some preset time
(verb) fill with apprehension or alarm; cause to be unpleasantly surprised; "I was horrified at the thought of being late for my interview"; "The news of the executions horrified us"
warn or arouse to a sense of danger or call to a state of preparedness; "The empty house alarmed him"; "We alerted the new neighbors to the high rate of burglaries"

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