[noun] fear resulting from the awareness of danger Synonyms:dismay, consternation
[noun] a device that signals the occurrence of some undesirable event Synonyms:warning device, system
[noun] an automatic signal (usually a sound) warning of danger Synonyms:alert, warning signal, alarum
[noun] a clock that wakes sleeper at preset time Synonyms:clock
[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" Synonyms:dismay, appal, appall, horrify
[verb] 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" Synonyms:alert