Meaning of 'alarm'

noun

a device that signals the occurrence of some undesirable event

Synonyms: warning device alarm system

noun

a clock that wakes a sleeper at some preset time

Synonyms: alarm clock

noun

an automatic signal (usually a sound) warning of danger

Synonyms: alert

noun

fear resulting from the awareness of danger

Synonyms: dismay consternation

verb

to warn or arouse to a sense of danger, or to call to a state of preparedness

Example: "The empty house alarmed me."

Synonyms: alert

verb

to fill with apprehension or alarm

Example: "I don't mean to alarm you, but your car is on fire."

Synonyms: dismay appall horrify