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TOEFL IELTS BNC: 3004 COCA: 3693
alarmnounuk/əˈlɑːm/ us/əˈlɑːrm/

alarm noun WARNING

[ C ] a warning of danger, usually a loud noise or flashing light警报

If there's any trouble, raise/sound the alarm by pulling the emergency cord.如果出现任何问题，拉紧急警报索报警。
The first two bomb alerts were false alarms, but the third was for real.前两次炸弹警报是一场虚惊，但是第三次是真的。

B1 [ C ] a device that makes a loud noise to warn of danger警报器；警报装置

a burglar/car/fire/smoke alarm防盗／汽车／防火／烟雾警报器

A2 [ C ] an alarm clock 闹钟

B1 [ C ] If an electronic device such as a watch or computer has an alarm, it can be set to make a noise at a particular time.闹铃装置；定时装置

More examples

If the alarm sounds, leave the building immediately.

The fire alarm goes off accidentally so often that when it's the real thing nobody will take any notice.

Quick, sound the alarm - there's a fire in the machine room!

Police said the thieves were obviously well acquainted with the alarm system at the department store.

I heard his alarm clock bleeping this morning.

alarm noun WORRY

C2 [ U ] sudden worry and fear, especially that something dangerous or unpleasant might happen惊恐，惊慌；担忧

I didn't tell her that he was late because I didn't want to cause her any alarm.我没有告诉她他来晚了，因为我不想让她担惊受怕。
Villagers have reacted with alarm to news of a proposed new road.听说有要修新路的计划，村民们很是担忧。

More examples

The birds flew off in alarm when the cat appeared.

There was alarm in the stock market today when prices suddenly began to drop.

The gun shot made the monkeys chatter in alarm.

It's all right, everybody - there's no need for alarm.

A bomb threat caused great alarm in the City this morning.

Idiom(s)

raise the alarm
ring/sound alarm bells
alarmverb [ T ]uk/əˈlɑːm/ us/əˈlɑːrm/

C1 to make someone worried or frightened令某人担心或害怕

I didn't want to alarm him by telling him that she was ill.我不想让他担心，没有告诉他她生病的事。
TOEFL IELTS BNC: 3004 COCA: 3693
alarm

noun¹

 1fear/worry驚恐；憂慮ADJECTIVE | VERB + ALARM | PREPOSITION | PHRASES ADJECTIVE➤considerable, great相當大的憂慮；極大的驚慌▸➤growing不斷增加的擔憂▸➤sudden突然產生的擔憂▸➤public公眾的擔憂◇There is growing public alarm at this increase in crime.公眾對罪案的增加越來越感到擔憂。➤unnecessary不必要的擔心VERB + ALARM➤cause, create, provoke引起恐慌；引發擔憂◇The school's policies have caused alarm among parents.學校的政策引起了家長們的恐慌。◇The incident created serious public alarm.這一事件使公眾深感憂慮。➤express表示憂慮◇Many people have expressed alarm at the plans.許多人對這些計劃表示擔憂。PREPOSITION➤in alarm驚慌地◇He shouted out in alarm.他驚慌地喊叫起來。➤to sb's alarm讓某人擔憂的是◇To her parents' alarm, she announced that she intended to travel the world.她說她打算環遊世界，讓父母很擔心。➤with alarm驚慌地◇The news has been greeted with alarm.人們聽到這一消息感到惶恐不安。➤alarm about, alarm at, alarm over對⋯感到擔憂◇There has been considerable alarm about the new proposals.人們對這些新建議感到非常擔憂。PHRASES➤cause for alarm擔心的理由◇I see no cause for alarm, as she often arrives late.我看沒什麼可擔心的，因為她經常遲到。
alarm

noun²

 2warning of danger警報ADJECTIVE | VERB + ALARM | ALARM + NOUN ADJECTIVE➤false虛假的警報◇The police were called, but it was a false alarm.打電話叫了警察，卻是一場虛驚。VERB + ALARM➤give, raise, sound報警；引起警覺；發出警報◇The guard raised the alarm when he discovered that six prisoners had escaped.警衞發現跑了 6 名犯人後發出了警報。ALARM + NOUN➤call警報呼號◇Many birds give alarm calls to warn of danger.許多鳥都會發出危險警報。
alarm

noun³

 3device設備ADJECTIVE | VERB + ALARM | ALARM + VERB | ALARM + NOUN ADJECTIVE➤fire, smoke火警／煙霧報警器▸➤burglar, intruder, security防盜／入室／安全警報器▸➤car車輛報警器▸➤panic, personal, rape (BrE) 緊急／個人防身／防強姦報警器◇Carry a personal alarm with you and make sure you know how to use it.隨身攜帶一台個人防身報警器，並保證知道如何使用。➤radio收音機鬧鐘VERB + ALARM➤set定鬧鐘◇I set my alarm for 6.30.我把鬧鐘定在 6 點 30 分。➤activate, set off, trigger, trip激活／觸響／觸發／觸動報警器◇Unfortunately any little noise can set off the alarm.可惜，一丁點兒聲音都能觸響警報器。➤disable, switch off, turn off使報警器失靈；關掉警報；關閉警報▸➤be fitted with (BrE) 裝有警報器◇The fire brigade recommends that every house is fitted with a smoke alarm.消防隊建議每幢房屋都應裝上煙霧報警器。➤fit, install安裝報警器▸➤test測試報警器ALARM + VERB➤go off, ring, sound警報響起；鬧鐘響起◇The alarm went off at 7 o'clock.鬧鐘 7 點鐘響了。◇Suddenly the alarm sounded and they all had to leave the building.突然警報響起來，他們不得不全部撤離大樓。ALARM + NOUN➤bell, clock, system警鈴，鬧鐘；報警系統▸➤call (BrE) (wake-up call in NAmE) （旅館的）叫早電話◇Book an alarm call if you need to make an early start.如果需要一早動身，可以預約叫早電話。
TOEFL IELTS BNC: 3004 COCA: 3693
alarm noun
⇨ alarm (a burglar alarm) ⇨ fear (a feeling of alarm) ⇨ warning (raise the alarm)alarm verb
⇨ frighten alarm

noun

alarm ♦︎ siren ♦︎ hornThese are all words for a device that makes a noise to warn people or attract their attention. 这些词均指能发出警报的装置。PATTERNS AND COLLOCATIONS 句型和搭配◆to hear an alarm / a siren / a horn◆an alarm / a siren / a horn sounds■ alarm [countable] a device that makes a noise to warn people of a particular danger 警报器◆All new houses must be fitted with a smoke alarm.所有新建房屋必须安装烟雾警报器。◆The earthquake set off burglar alarms throughout the city.地震触发了全城的防盗警钟。◆A car alarm went off in the middle of the night.半夜里，一辆汽车的警报器突然响了起来。   see also alarm ⇨ warning ■ siren ˈsaɪrən [countable] a device that makes a long, very loud noise as a warning or signal 警报器；汽笛◆Air-raid sirens sounded to warn everyone in the city that an attack was coming.空袭警报响起，提醒城里的人空袭即将来临。◆A police car raced past with its siren wailing.一辆警车鸣着警笛飞驰而过。■ horn [countable] a device in a vehicle for making a loud noise as a warning or signal （汽车）喇叭◆She flashed her lights and honked her horn at the car in front.她向前面的车闪了车灯，按了喇叭。◆Behind him, a horn blared.在他身后响起了刺耳的喇叭声。
TOEFL IELTS BNC: 3004 COCA: 3693

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