noun
plural alarms
[count] a device that makes a loud sound as a warning or signal
In figurative usage, when alarm bells are ringing people are worried about a possible problem or danger.
alarm clock
[noncount] :a feeling of fear caused by a sudden sense of danger
synonyms see1fear</SYNR
[count] :a warning of danger
verb
alarms; alarmed; alarming
[+ obj] :to cause (someone) to feel a sense of danger :to worry or frighten (someone)