Question

alarm
I
 /əˈlɑɚm/  noun  ,  pl   alarms
  1 [  count  ]
  1 a : a device that makes a loud sound as a warning or signal
   The alarm went off when he opened the door.
   a car alarm
   The whole town heard the alarm.
  ◇ In figurative usage, when alarm bells are ringing people are worried about a possible problem or danger.
   His long absence from school set (the) alarm bells ringing and we finally called the police.
  — see also burglar alarm, false alarm, fire alarm, smoke alarm
  1 b : alarm clock
   She set the alarm for six o'clock.
   The alarm went off at six o'clock.
  2 [  noncount  ] : a feeling of fear caused by a sudden sense of danger
   The rumors caused widespread alarm and concern.
   His parents have expressed alarm about/for his safety.
   The new developments are being viewed with alarm.
   She looked around in alarm when she heard the noise.
   There's no cause for alarm. [=there is no reason to be worried or afraid]
  synonyms see fear, 1
  3 [  count  ] : a warning of danger
   The dog's barking gave the alarm and the intruders were caught.
   A passerby saw the intruders and raised the alarm.
   They have ignored repeated alarms about the dangers of smoking.
   Economists have raised/sounded the alarm [=have warned people] about a possible recession.
   Economists have been raising/sounding alarms about a possible recession.
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II
  verb  , alarms, alarmed, alarm·ing [  + obj  ]
  : to cause (someone) to feel a sense of danger : to worry or frighten (someone)
   I didn't mean to alarm you.
   The rapid spread of the disease has alarmed many people.
  alarmed  adj   [more ~; most ~]
   I was alarmed to see how sick he is.
   Many people are alarmed about/at/by the rapid spread of the disease.
  alarming  adj   [more ~; most ~]
   an alarming number of problems
   It is alarming to see how quickly the disease is spreading.
   The team lost with alarming frequency.
  alarm·ing·ly /əˈlɑɚmıŋli/  adv