4. (verb)alarm clock, alarm a clock that wakes a sleeper at some preset time
5. (verb)dismay, alarm, appal, appall, horrify 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"
6. (verb)alarm, alert 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"