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  1. Dictionary
    alarm
    /əˈlɑːm/

    noun

    verb

    • 1. cause (someone) to feel frightened, disturbed, or in danger: "many people were alarmed by the decision"
    • 2. fit or protect with an alarm: "I've just spent a fortune to alarm the house"

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    More definitions, origin and scrabble points

  2. dictionary.cambridge.org › dictionary › englishALARM | English meaning - Cambridge Dictionary

    a warning of danger, usually a loud noise or flashing light: If there's any trouble, raise / sound the alarm by pulling the emergency cord. The first two bomb alerts were false alarms, but the third was for real. B1 [ C ] a device that makes a loud noise to warn of danger: a burglar / car / fire / smoke alarm. A2 [ C ] an alarm clock.

  3. www.merriam-webster.com › dictionary › alarmAlarm Definition & Meaning - Merriam-Webster

    Today we usually think of an alarm as a loud noise that awakens us or warns us of fire or some other danger. Its first use, however, was as a call to arms to soldiers in Italy. The Italian phrase all'arme! means literally "to arms" or "to your weapons."

  4. www.collinsdictionary.com › dictionary › englishALARM definition and meaning | Collins English Dictionary

    If something alarms you, it makes you afraid or anxious that something unpleasant or dangerous might happen.

  5. www.dictionary.com › browse › alarmALARM Definition & Meaning | Dictionary.com

    a sudden fear or distressing suspense caused by an awareness of danger; apprehension; fright. Synonyms: panic, terror, consternation. any sound, outcry, or information intended to warn of approaching danger: Paul Revere raced through the countryside raising the alarm that the British were coming.

  6. www.oxfordlearnersdictionaries.com › definition › englishalarm noun - Definition, pictures, pronunciation and usage notes...

    alarm. noun. /əˈlɑːm/ /əˈlɑːrm/ Idioms. [countable, usually singular] a loud noise or a signal that warns people of danger or of a problem. She decided to sound the alarm (= warn people that the situation was dangerous). I hammered on all the doors to raise the alarm. By the time the alarm was raised the intruders had escaped. see also false alarm.

  7. www.thefreedictionary.com › AlarmAlarm - definition of alarm by The Free Dictionary

    1. Sudden fear or concern caused by the realization of danger or an impending setback. See Synonyms at fear. 2. A warning of existing or approaching danger: The committee's report issued an alarm about the dangerous condition of the town's buildings. 3. A device that is used to warn of danger by means of a sound or signal: a fire alarm. 4.

  8. dictionary.cambridge.org › dictionary › learner-englishALARM | meaning - Cambridge Learner's Dictionary

    ALARM definition: 1. a loud noise that warns you of danger: 2. a clock that makes a noise to wake you 3. a sudden…. Learn more.