Definition of alarmed adjective from the Oxford Advanced American Dictionary

Oxford3000

alarmed

adjective
/əˈlɑrmd/
 
[not before noun]
 
1 alarmed (at/by something) anxious or afraid that something dangerous or unpleasant might happenShe was alarmed at the prospect of traveling alone.2 protected by an alarmThis door is alarmed.
Usage noteUsage note: afraidscared frightened terrified alarmed paranoidThese words all describe feeling or showing fear.afraid [not before noun] feeling fear; worried that something bad might happen: There's nothing to be afraid of. Aren't you afraid (that) you'll fall?scared feeling fear; worried that something bad might happen: The thieves got scared and ran away. She was scared that the glass would break.frightened feeling fear; worried that something bad might happen: a frightened childafraid, scared, or frightened?Scared is more informal, more common in speech, and often describes small fears.Afraid cannot come before a noun. It can only take the preposition of, not about. If you are afraid/scared/frightened of something, or afraid/scared/frightened to do something, you think you are in danger of being hurt or suffering in some way. If you are scared/frightened about something, it is less a fear for your personal safety and more a worry that something unpleasant might happen.terrified very frightened: I was terrified (that) she might follow me. She looked at him with wide, terrified eyes. I was terrified of flying.alarmed afraid that something dangerous or unpleasant might happen: She was alarmed at the prospect of traveling alone.paranoid (somewhat informal) afraid or suspicious in a way that is not reasonable: You're just being paranoid.patternsafraid/scared/frightened/terrified of spiders, etc.scared/frightened/paranoid aboutafraid/scared/frightened/terrified thatafraid/scared/frightened to open the door, etc.Don't be afraid/scared/frightened/alarmed.