English Reference

Word

alarm

US/əˈɫɑɹm/

UK/ɐlˈɑːm/

Definitions

01warning device

B1 · Intermediate Countable noun

n. a machine or device that makes a loud noise to warn you about danger, like a fire or a thief.

n. a mechanical or electronic device designed to emit a signal as a warning of danger or unauthorized intrusion.

“The smoke alarm started ringing because I burnt the toast.”

“The building's security alarm was triggered accidentally when a staff member entered the restricted zone without deactivating the sensors.”

02clock for waking up

A2 · Elementary Countable noun

n. a clock or phone app that makes a sound to wake you up at a specific time.

n. a device or software function used to rouse a person from sleep at a predetermined time.

“I set my alarm for seven o'clock so I wouldn't be late for work.”

“He found it difficult to adjust to the early shift, often sleeping through his alarm despite the high volume of the buzzer.”

Synonyms

alarm clockwake-up call

03feeling of fear

B2 · Upper Intermediate Uncountable noun

n. a sudden feeling of fear or worry that something dangerous is happening.

n. a state of sudden anxiety or fear resulting from the realization of danger.

“The news of the storm caused great alarm among the people living near the coast.”

“The sudden drop in the company's share price caused considerable alarm among the board of directors, leading to an emergency meeting.”

Antonyms

04to worry someone

B1 · Intermediate

v. to make someone feel worried or afraid.

v. to cause someone to feel a sudden sense of danger or anxiety. Transitive, always requiring an object.

“I don't want to alarm you, but I think I smell gas in the kitchen.”

“The doctor was careful not to alarm the patient while explaining the potential risks associated with the upcoming surgery.”

Synonyms

frightenscareunsettle

Antonyms

Collocations

Common phrases and expressions where native English speakers use the word “alarm” in context.

Verb

01. set off an alarm

“The smoke from the burnt toast set off the fire alarm.”

verb + noun

02. set your alarm

“Don't forget to set your alarm for 6:00 AM so you don't miss the train.”

verb + possessive + noun

03. sound the alarm

“The security guard sounded the alarm as soon as he saw the intruders.”

verb + noun

Adjective

04. false alarm

“The fire department arrived, but it was just a false alarm caused by a faulty sensor.”

adj + noun

Noun

05. alarm clock

“My alarm clock is very loud, so it always wakes me up immediately.”

noun + noun

06. alarm goes off

“I was having a great dream when my alarm went off.”

noun + verb

Preposition

07. in alarm

“She looked up in alarm when she heard the loud crash outside.”

prep + noun

Etymology

From Middle English alarme, alarom, borrowed from Middle French alarme, itself from Old Italian all'arme! (“to arms!, to the weapons!”), ultimately from Latin arma (“arms, weapons”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

NOUN

alarm(B1)

ADJECTIVE

Related words

Idioms

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.B1 PreliminaryIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.4.0–5.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 3.0–3.544–71TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.550–784
Frequency
Common
Level
B1 · IntermediateOxford
Updated

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