Princeton's WordNet

1. alarm, dismay, consternation(noun)

   fear resulting from the awareness of danger

2. alarm, warning device, alarm system(noun)

   a device that signals the occurrence of some undesirable event

3. alarm, alert, warning signal, alarum(noun)

   an automatic signal (usually a sound) warning of danger

4. alarm clock, alarm(verb)

   a clock that wakes a sleeper at some preset time

5. dismay, alarm, appal, appall, horrify(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"

6. alarm, alert(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"

Kernerman English Learner's Dictionary

1. alarm(noun)əˈlɑrm

   a device that wakes you up

   The alarm went off at 6:00 a.m.; Did you set the alarm?

2. alarməˈlɑrm

   a device that warns you of smoke or fire

   a smoke/fire alarm

3. alarməˈlɑrm

   a strong feeling of worry and panic

   "Where's my daughter?" she screamed in alarm.

4. alarməˈlɑrm

   to warn people

   the first newspaper to raise the alarm about the problem

5. alarm(verb)əˈlɑrm

   to cause great worry

   Falling share prices alarmed investors.

Wiktionary

1. alarm(Noun)

   A summons to arms, as on the approach of an enemy.

   Arming to answer in a night alarm. --Shakespeare.

2. alarm(Noun)

   Any sound or information intended to give notice of approaching danger; a warning sound to arouse attention; a warning of danger.

3. alarm(Noun)

   Sudden surprise with fear or terror excited by apprehension of danger; in the military use, commonly, sudden apprehension of being attacked by surprise.

   Alarm and resentment spread throughout the camp. --Thomas Babington Macaulay.

4. alarm(Noun)

   A mechanical device for awaking people, or rousing their attention.

   The clockradio is a friendlier version of the cold alarm by the bedside

5. alarm(Noun)

   An instance of an alarum ringing or clanging, to give a noise signal at a certain time.

   You should set the alarm on your watch to go off at seven o'clock.

6. alarm(Verb)

   To call to arms for defense

7. alarm(Verb)

   To give (someone) notice of approaching danger

8. alarm(Verb)

   To rouse to vigilance and action; to put on the alert.

9. alarm(Verb)

   To surprise with apprehension of danger; to fill with anxiety in regard to threatening evil; to excite with sudden fear.

10. alarm(Verb)

    To keep in excitement; to disturb.

Origin: From alarme, alarom, from alarme, itself from Old , ultimately from arma.

Webster Dictionary

1. Alarm(noun)

   a summons to arms, as on the approach of an enemy

2. Alarm(noun)

   any sound or information intended to give notice of approaching danger; a warning sound to arouse attention; a warning of danger

3. Alarm(noun)

   a sudden attack; disturbance; broil

4. Alarm(noun)

   sudden surprise with fear or terror excited by apprehension of danger; in the military use, commonly, sudden apprehension of being attacked by surprise

5. Alarm(noun)

   a mechanical contrivance for awaking persons from sleep, or rousing their attention; an alarum

6. Alarm(verb)

   to call to arms for defense; to give notice to (any one) of approaching danger; to rouse to vigilance and action; to put on the alert

7. Alarm(verb)

   to keep in excitement; to disturb

8. Alarm(verb)

   to surprise with apprehension of danger; to fill with anxiety in regard to threatening evil; to excite with sudden fear

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