Definition of alert in English:

alert

adjective əˈləːtəˈlərt

1Quick to notice any unusual and potentially dangerous or difficult circumstances; vigilant.
警惕的，警觉的，机警的
an alert police officer discovered a lorry full of explosive
一位警惕的警官发现了一辆满载炸药的卡车。
schools need to be constantly alert to this problem
各学校对此问题应该始终保持警惕。
Example sentencesExamples
- There are signs that Congress is at least somewhat alert to these dangers.
- And shortly thereafter, several alert readers noticed something very peculiar.
- You begin to become more alert to your surroundings.
- I think they're very guarded and very alert to anything that they think might be untoward or suspicious.
- As you revise, you should be very alert to this point.
- He is very alert to matters of procedural fairness.
- In fact, he was very alert to the activity of the minor pieces.
- At the other end Dermot Byrne almost got clear but Farrell Cuddihy was very alert to clear the danger.
- Though at times they don't seem to be the most aware of animals, sheep are very alert to mood swings, and this time was no exception.
- His poetry continued as it began, very alert to Art as politically acquiescent, complicit or compromised.
- Firstly Ballyfin's Eoin McEvoy had to be very alert to deny Conroy.
- It has however been equally alert to the fact that a State might present a charge in this way, when in reality it was seeking to impede imports, or in circumstances where there was no commercial exchange at all.
- The man was completely alert to his surroundings.
- "Thanks to the efforts of police and the media, the public is more alert to these practices.
- He did not bother answering me, his eyes were almost closed, but the impression he gave was that he was concentrating intensely and quite alert to what was happening around us.
- Typically alert to nuances, he was among the first to switch into post-mortem analytic mode.
- So Pacific Islanders today are very alert to their ocean, and their ownership of that ocean, and their custodianship of that ocean.
- We were all surely alert to the subliminal messages in the deceptive modesty of his glances.
- One consequence is that consumers are more alert to influences than ever before.
- One must also be very alert to the fact that some pilgrims of certain nationalities come in bunches and batches and push their way through.
Synonyms
vigilant, wide awake, aware, watchful, attentive, observant, circumspect, wary, chary, heedful, canny
on the lookout, on one's guard, on one's toes, all ears, keeping one's eyes open/peeled, keeping a weather eye open, on the qui vive
1. 1.1 Able to think clearly; intellectually active.
  机灵的，机敏的
  she remained active and alert until well into her eighties
  她80多岁时仍然活跃机敏。
  Example sentencesExamples
  Still active and alert Mary attributes her longevity to plenty of hard work, good genes, a healthy lifestyle and a positive outlook on life in general.
  On his good days, he is very alert mentally and engages clearly with the issues at hand; on other days he finds it difficult to focus.
  In both studies, patients were alert and able to communicate by holding up fingers in response to questions and did not themselves complete the instruments.
  She was quite alert and was able to learn the English language rather quickly.
  Everyone agreed that Mr Sage was an intelligent, alert man, notwithstanding his years.
  Advocaat was appropriate raw material for such an alert intellect.
  Ms L was alert and oriented and able to move both lower extremities at the time of transfer.
  She was a very active and alert lady and was a founder member of Clonaslee ICA.
  Tanner was alert and able to answer questions but was not extremely active.
  At physical examination at the time of discharge, she was alert and able to converse and had limited flexion in the lower extremities.
  Still alert and active, she talked to the Evening Press and recalled how she managed to get the youngsters and all her family on to a ship bound for the USA in 1935.
  It is the first principle of an alert intellect.
  Surviving in a comatose state, his mind is still alert and active.
  I realise that I must keep mentally alert to delay the process of degeneration.
  ‘He was 93 but he remained mentally very alert until the very end although physically he became very ill,’ added Mr Maltin.
  By this time, the sedating medications usually are significantly dissipated, and the patient is alert and oriented and able to lift his or her own leg.
  Undemonstrative, quick-witted, alert and intelligent: he has it all.
  Throughout his life he remained very alert and active until very recent times.
  The swelling in his face is nearly gone and he's much more alert and active, which is really encouraging.
  ‘She is a very bright little girl, very alert,’ she said.
  Synonyms
  quick-witted, sharp, bright, quick, keen, perceptive, wide awake, responsive, agile, acute, astute
  informal on the ball, on one's toes, quick off the mark, quick on the uptake, all there, with it, bright-eyed and bushy-tailed

noun əˈləːtəˈlərt

mass noun

1The state of being watchful for possible danger.
警惕，警戒
security forces are on the alert for an upsurge in violence
安全部队处于戒备状态，以防暴力升级。
Example sentencesExamples
- But the industry was put on alert about the possible tax rises at a conference this month when a representative from the Revenue said the memoranda would need to be reviewed.
- Initially, the company was put on alert for possible participation in an airport security mission.
- Hospitals and doctors have been placed on alert to be prepared to quarantine patients suspected of suffering from the early stages of the virus.
- Forestry Minister John Browne has urged forest owners to be prepared and on alert and to help to stamp out fires in plantations.
- However, as they approached and she saw the ambulance and all the patrol cars, she put her defenses on alert and prepared herself for anything.
- Medical staff in Scarborough have been put on alert for possible infections after a patient at the resort's hospital died of pneumonia.
- And now, as his execution by lethal injection nears, some clinics providing abortions are on alert for possible violence.
- But despite the favorable atmosphere, police remained on alert for possible security threats on the session, the officer said.
- So, it makes sense to be on alert in a cautious, sensible way all throughout the country.
- No matter how carefully drivers stay on alert against unexpected pedestrians rushing out in front of them, disasters will still occur and there are always casualties.
- This was not the case with security forces, however, who remained on alert against possible terror attacks.
- And Ergon Energy stockpiled materials and put crews on alert yesterday in preparation for possible damage to the electricity network.
- The main north-south highway was reopened on Thursday but motorists were urged to remain on alert against possible dangers caused by the continuing heavy rains.
- Police guarded key sites in New York, on alert for possible truck bombs, suicide bombers and chemical and biological attack.
- Dalton sees the handwriting on the wall and wants to put the town on alert for possible evacuation, but the request is refused by his politically conscious superior.
- It's still pretty high, but even if it does, we can be on alert to get out of here as soon as possible.
- Greater Manchester was put on alert today as firemen prepared for the start of a national strike.
- France was on alert yesterday for a possible upsurge of violence as the country headed into a long holiday weekend, two weeks after rioting broke out in a run-down suburb of the capital.
- The President had urged the public to be on alert for possible terrorist actions in September or October.
- Army reserve units have also been placed on alert for possible call-up.
Synonyms
vigilance, watchfulness, carefulness, attentiveness, guardedness, care, caution, cautiousness, wariness, chariness, alertness, circumspection, prudence, heedfulness, heed, mindfulness
1. 1.1count noun An announcement or signal warning of danger.
  警报，警示
  a bomb alert
  轰炸警报。
  Example sentencesExamples
  When I woke up yesterday morning, my Inbox was flooded with news alerts from Karbala, Iskandariyah and Babil.
  Preventive alerts and warnings sometimes issued at the local level were not repeated nationally.
  The all-clear had in fact sounded from an initial alert when the bomb was dropped.
  If a flood alert is issued, the Association of British Insurers advises that valuables and furniture are shifted to higher floors.
  There has been a continual stream of bomb alerts.
  On Tuesday computer security experts issued a worldwide alert of the imminent danger to the Internet from the spread of the worm virus.
  The district administration has sounded an alert.
  Meanwhile there are fresh alerts of bomb attacks raised.
  A flood alert was sounded in Kinnaur, Shimla, Kulu and Mandi districts last evening after water started overflowing from the lake, bringing along a lot of silt.
  ‘These floods are an alert,’ said Dr Mike Hulme, reader in climatology in the climate research unit at the University of East Anglia.
  There were also bomb alerts in Philadelphia and Washington.
  Yes, it's frustrating to have alerts sounded and then have nothing happen.
  In future, flood alerts will be sent out by text message and mobile phone calls as well as pagers, and the agency's website is also being upgraded so it can better handle sudden surges in the number of ‘hits’ during floods.
  The Environment Agency is hoping to be able to issue flood alerts for all major watercourses in the future.
  Normally it sounds text-message alerts about 90 times a day.
  There have been alerts warning of bombs being hidden in cameras, cell phones, even stuffed toys.
  Some of his public alerts sound quite fanciful.
  Science may not yet be able to predict earthquakes with complete accuracy, but an early warning network exists in the Pacific Ocean to issue alerts about the danger of tsunamis.
  A bomb alert was issued at a post office in Germany this week after a package waiting to be delivered began vibrating and emitting a strange noise.
  The Environment Agency issued flood alerts for several rivers and part of the A12 was sealed off.
  Synonyms
  warning, caution, notification, notice, exhortation, injunction
  siren, alarm, signal, danger signal, distress signal
2. 1.2count noun A period of vigilance following a warning of danger.
  警戒期
  traffic was halted during the alert
  警戒期间交通被中断。
  Example sentencesExamples
  Civil libertarians say the case poses a landmark test of what people can do or whom they can associate with in the age of terror alerts.
  The explosions came amid worldwide terror alerts and four days after a series of bombings killed 34 people.
  Consideration should be given to suspending the collection of all tolls during ozone alerts
  This weekend sees terror alerts covering a great part of the world.
  At the same time, the government has ordered a general alert, canceling all leave and reinforcing positions.
  Physicians are asking people to understand the impact smog can have on their health and to take appropriate measures to stay healthy during smog alerts.
  The incident follows a similar alert at a post office earlier this week.
  In what I earnestly hope will be a source of lessons learned, a large meteor entered Earth's atmosphere near Jakarta this weekend during a terror alert.
  How do we explain what appears to be a night and day difference between the year prior to November 2004 and the year since in terms of terror alerts and scares?
  The plan, devised with the help of York Council emergency planning co-ordinator Barry Kelly, aims to speed local response when an alert occurs.
  In a nervous age of orange alerts, who will take the place of Mister Rogers?
  Thousands of holidaymakers who lost luggage following the airport security alert earlier this month are unlikely to be able to claim compensation from their insurers, it emerged last week.
  The country is on a war alert following terrorist attacks on its Parliament building.
  What To Do During Hurricane Alerts.
  Locals say the series of explosions and alerts over the last decade have shattered their confidence in their company's ability to manage the plant without it presenting a hazard to their lives.
  When exercising outdoors during a smog alert, even healthy people may cough or wheeze.
  A crowd throw petrol bombs and stones at police and army during a security alert in west Belfast.
  I think if we are going to have these high alerts in the future, I think it is incumbent on the attorney general to give us more information.
3. 1.3count noun A signal on an electronic device that prompts the user to do something or attracts their attention.
  （电子设备的）提示信号
  a vibrating alert is a discreet alternative to ringtones
  相对于铃声信号而言，振动提示信号是一种谨慎的替代手段。
  Example sentencesExamples
  It took a little getting used to, but after a while, I realised I was back in Singapore, where it doesn't matter if phones ring or SMS alerts beep loudly on the trains.
  For example, certain software programs allow users to send e-mail alerts.
  In this way, this solution will typically filter the number of alerts from security devices down by a factor of 1000 or more.
  Today's edition carries a security alert for users of Windows.
  This software can now, for example, send out a real-time alert to Outlook users when it picks up on an appointment conflict.
  And if you want to be alerted when a new user is added to the system, ask for alerts on users.
  Whenever the number of deaths rises or falls unexpectedly, the software triggers an alert which prompts a clinical investigation into the possible causes.
  Capabilities are provided for automating customer service requirements and the system provides alerts to tell users when a problem has occurred, such as an invoice that has not been paid.
  Pop-up ads disguised as Windows system administration alerts annoy users and puzzle security experts.
  However, it was the features of the new release that stood out: the product will now support foreign keys, stored procedures and database alerts.
  Local severe weather alerts, delivered to city Web pages and individually to e-mail, cell phones or personal digit assistants.
  With the ability to receive simple text messages, Wall Street traders now get real-time alerts whenever a major deal is carried out in overseas financial markets.
  There is a hands-free speaker mode and a vibrate alert.
  These bogus alerts directed users to a maliciously constructed Web site run by Papierniak, instead of the genuine PayPal site.
  The software will send out an alert when the user reaches his or her threshold and can also automatically free up more space for the user, if desired.
  Register and sign up for your own personalized ticker, and get special news and even e-mail alerts about stocks that matter to you.
  It is forecast that in the future mobile phones will be used to send multimedia alerts, with audio and images, and electronic greeting cards.
  In addition, our company has also introduced SMS alerts for worldwide parcel deliveries.
  Still others offer wedding registry data, sports results and even terror alerts.
  With the news alerts tool, users type in the news topic they would like to track, and choose whether they would like to receive bulletins once a day or ‘as it happens.’
  Synonyms
  audible warning, purr, purring, ring, ringing, note, tone, beep, bleep, meep, warble, signal, alarm

verb əˈləːtəˈlərt

[with object]

Warn (someone) of a danger or problem.
he alerted people to the dangers of smoking
他提醒人们注意吸烟的种种危害。
police were alerted after three men drove away without paying
三个男人没付钱就开车走掉之后，警方开始警觉起来。
Example sentencesExamples
- Surely it would make more sense to put up an advert outside a football ground alerting men to the dangers of testicular or prostate cancer?
- Somehow, she made it out to the poolside without alerting anyone inside the house.
- She said the words as loud as she could without alerting the driver of the van that they were both awake.
- A neighbour was alerted by the commotion and police and ambulance attended the scene.
- She had just started relaxing when her laptop gave a small beep, alerting her that she had mail.
- A pensioner is lucky to be alive after her dog alerted her to the danger of a fire at her home
- He alerted colleagues in a bid to warn drivers heading north on the motorway.
- To be able to take the money out of her pouch without even alerting her would have taken real skill.
- Computers can also cut costs by alerting a physician ordering a test that it has already been done.
- The splash was subtle, but it made a noise that was quite loud, alerting anyone close by.
- We also implemented a new information campaign in our waiting room aimed at alerting young people to the danger of infection.
- She let out a soft moan that would only reach Cindy's ears, alerting her of her discomfort.
- Wenger did the game a service by alerting us to the dangers.
- Marriages broke up, alerting women to the disadvantages of being financially dependent.
- I mention this by way of alerting you to the only moment in the book where we feel even mildly uncomfortable.
- Lizzie had seen the glow of the flames when she went upstairs and alerted her parents.
- The ensuing silence was heavy, alerting him to just how still the room was, how lonely.
- She gave him a pointed look, alerting him that she was aware of his duplicity.
- To hunt a man without alerting the people is like finding a needle in a haystack.
- This will help avoid changes being made by someone without alerting other people.
Synonyms
warn, notify, apprise, caution, put on one's guard, forewarn, put on the qui vive, arouse
informal tip off, clue in, put in the picture, put wise

Derivatives

alertly

adverb əˈləːtliəˈlərtli

But I was grateful to the copy editor for reading the book sufficiently alertly to have noticed.
Example sentencesExamples
- An original thinker always alertly attuned to contemporary culture, he was admired for his intellectual style and the felicity with which he expressed his ideas in his many books and articles.
- Thankfully, however, the deer do wise up quickly, alertly scanning their surroundings for different sounds or a hint of movement that wasn't there the day before.
- Both Aaron and Ryan moved carefully and alertly, and Ryan had his sword drawn.
- They look at the little vehicle curiously but not very alertly.

Origin

Late 16th century (originally in military use): from French alerte, from Italian all' erta 'to the watchtower'.

This comes from the Italian military phrase all' erta, ‘on the lookout’ or, more literally, ‘to the watchtower’. It was originally a military term in English too, before it acquired its more general meaning. Alert was first used as an adverb, so you could say that the later expression on the alert strictly means ‘on the on the lookout’.

Rhymes

advert, animadvert, assert, avert, Bert, blurt, Burt, cert, chert, concert, controvert, convert, curt, desert, dessert, dirt, divert, exert, flirt, girt, hurt, inert, insert, introvert, Kurt, malapert, overt, pert, quirt, shirt, skirt, spirt, spurt, squirt, Sturt, subvert, vert, wort, yurt

Definition of alert in US English:

alert

adjectiveəˈlərtəˈlərt

1Quick to notice any unusual and potentially dangerous or difficult circumstances; vigilant.
警惕的，警觉的，机警的
an alert police officer discovered a truck full of explosives
一位警惕的警官发现了一辆满载炸药的卡车。
schools need to be constantly alert to this problem
各学校对此问题应该始终保持警惕。
Example sentencesExamples
- There are signs that Congress is at least somewhat alert to these dangers.
- Though at times they don't seem to be the most aware of animals, sheep are very alert to mood swings, and this time was no exception.
- His poetry continued as it began, very alert to Art as politically acquiescent, complicit or compromised.
- At the other end Dermot Byrne almost got clear but Farrell Cuddihy was very alert to clear the danger.
- In fact, he was very alert to the activity of the minor pieces.
- As you revise, you should be very alert to this point.
- Typically alert to nuances, he was among the first to switch into post-mortem analytic mode.
- So Pacific Islanders today are very alert to their ocean, and their ownership of that ocean, and their custodianship of that ocean.
- It has however been equally alert to the fact that a State might present a charge in this way, when in reality it was seeking to impede imports, or in circumstances where there was no commercial exchange at all.
- And shortly thereafter, several alert readers noticed something very peculiar.
- The man was completely alert to his surroundings.
- You begin to become more alert to your surroundings.
- He did not bother answering me, his eyes were almost closed, but the impression he gave was that he was concentrating intensely and quite alert to what was happening around us.
- We were all surely alert to the subliminal messages in the deceptive modesty of his glances.
- I think they're very guarded and very alert to anything that they think might be untoward or suspicious.
- He is very alert to matters of procedural fairness.
- One consequence is that consumers are more alert to influences than ever before.
- "Thanks to the efforts of police and the media, the public is more alert to these practices.
- One must also be very alert to the fact that some pilgrims of certain nationalities come in bunches and batches and push their way through.
- Firstly Ballyfin's Eoin McEvoy had to be very alert to deny Conroy.
Synonyms
vigilant, wide awake, aware, watchful, attentive, observant, circumspect, wary, chary, heedful, canny
1. 1.1 Able to think clearly; intellectually active.
  机灵的，机敏的
  she remained active and alert until well into her eighties
  她80多岁时仍然活跃机敏。
  Example sentencesExamples
  She was quite alert and was able to learn the English language rather quickly.
  In both studies, patients were alert and able to communicate by holding up fingers in response to questions and did not themselves complete the instruments.
  Still alert and active, she talked to the Evening Press and recalled how she managed to get the youngsters and all her family on to a ship bound for the USA in 1935.
  Still active and alert Mary attributes her longevity to plenty of hard work, good genes, a healthy lifestyle and a positive outlook on life in general.
  Throughout his life he remained very alert and active until very recent times.
  She was a very active and alert lady and was a founder member of Clonaslee ICA.
  Undemonstrative, quick-witted, alert and intelligent: he has it all.
  It is the first principle of an alert intellect.
  Advocaat was appropriate raw material for such an alert intellect.
  On his good days, he is very alert mentally and engages clearly with the issues at hand; on other days he finds it difficult to focus.
  Surviving in a comatose state, his mind is still alert and active.
  At physical examination at the time of discharge, she was alert and able to converse and had limited flexion in the lower extremities.
  The swelling in his face is nearly gone and he's much more alert and active, which is really encouraging.
  I realise that I must keep mentally alert to delay the process of degeneration.
  ‘She is a very bright little girl, very alert,’ she said.
  Tanner was alert and able to answer questions but was not extremely active.
  By this time, the sedating medications usually are significantly dissipated, and the patient is alert and oriented and able to lift his or her own leg.
  Ms L was alert and oriented and able to move both lower extremities at the time of transfer.
  ‘He was 93 but he remained mentally very alert until the very end although physically he became very ill,’ added Mr Maltin.
  Everyone agreed that Mr Sage was an intelligent, alert man, notwithstanding his years.
  Synonyms
  quick-witted, sharp, bright, quick, keen, perceptive, wide awake, responsive, agile, acute, astute

nounəˈlərtəˈlərt

1The state of being watchful for possible danger.
警惕，警戒
security forces were placed on alert
安全部队处于警戒状态。
Example sentencesExamples
- Army reserve units have also been placed on alert for possible call-up.
- Medical staff in Scarborough have been put on alert for possible infections after a patient at the resort's hospital died of pneumonia.
- And Ergon Energy stockpiled materials and put crews on alert yesterday in preparation for possible damage to the electricity network.
- Forestry Minister John Browne has urged forest owners to be prepared and on alert and to help to stamp out fires in plantations.
- This was not the case with security forces, however, who remained on alert against possible terror attacks.
- Police guarded key sites in New York, on alert for possible truck bombs, suicide bombers and chemical and biological attack.
- Hospitals and doctors have been placed on alert to be prepared to quarantine patients suspected of suffering from the early stages of the virus.
- But despite the favorable atmosphere, police remained on alert for possible security threats on the session, the officer said.
- The main north-south highway was reopened on Thursday but motorists were urged to remain on alert against possible dangers caused by the continuing heavy rains.
- Dalton sees the handwriting on the wall and wants to put the town on alert for possible evacuation, but the request is refused by his politically conscious superior.
- It's still pretty high, but even if it does, we can be on alert to get out of here as soon as possible.
- No matter how carefully drivers stay on alert against unexpected pedestrians rushing out in front of them, disasters will still occur and there are always casualties.
- And now, as his execution by lethal injection nears, some clinics providing abortions are on alert for possible violence.
- The President had urged the public to be on alert for possible terrorist actions in September or October.
- However, as they approached and she saw the ambulance and all the patrol cars, she put her defenses on alert and prepared herself for anything.
- But the industry was put on alert about the possible tax rises at a conference this month when a representative from the Revenue said the memoranda would need to be reviewed.
- So, it makes sense to be on alert in a cautious, sensible way all throughout the country.
- Initially, the company was put on alert for possible participation in an airport security mission.
- Greater Manchester was put on alert today as firemen prepared for the start of a national strike.
- France was on alert yesterday for a possible upsurge of violence as the country headed into a long holiday weekend, two weeks after rioting broke out in a run-down suburb of the capital.
Synonyms
vigilance, watchfulness, carefulness, attentiveness, guardedness, care, caution, cautiousness, wariness, chariness, alertness, circumspection, prudence, heedfulness, heed, mindfulness
1. 1.1 An announcement or signal warning of danger.
  警报，警示
  a bomb alert
  轰炸警报。
  an alert sounded and all the fighters took off
  警报响了，所有的战斗机随之起飞。
  Example sentencesExamples
  In future, flood alerts will be sent out by text message and mobile phone calls as well as pagers, and the agency's website is also being upgraded so it can better handle sudden surges in the number of ‘hits’ during floods.
  ‘These floods are an alert,’ said Dr Mike Hulme, reader in climatology in the climate research unit at the University of East Anglia.
  The all-clear had in fact sounded from an initial alert when the bomb was dropped.
  Some of his public alerts sound quite fanciful.
  If a flood alert is issued, the Association of British Insurers advises that valuables and furniture are shifted to higher floors.
  A bomb alert was issued at a post office in Germany this week after a package waiting to be delivered began vibrating and emitting a strange noise.
  The Environment Agency issued flood alerts for several rivers and part of the A12 was sealed off.
  The Environment Agency is hoping to be able to issue flood alerts for all major watercourses in the future.
  When I woke up yesterday morning, my Inbox was flooded with news alerts from Karbala, Iskandariyah and Babil.
  There has been a continual stream of bomb alerts.
  A flood alert was sounded in Kinnaur, Shimla, Kulu and Mandi districts last evening after water started overflowing from the lake, bringing along a lot of silt.
  Meanwhile there are fresh alerts of bomb attacks raised.
  Yes, it's frustrating to have alerts sounded and then have nothing happen.
  Normally it sounds text-message alerts about 90 times a day.
  Science may not yet be able to predict earthquakes with complete accuracy, but an early warning network exists in the Pacific Ocean to issue alerts about the danger of tsunamis.
  The district administration has sounded an alert.
  Preventive alerts and warnings sometimes issued at the local level were not repeated nationally.
  There were also bomb alerts in Philadelphia and Washington.
  On Tuesday computer security experts issued a worldwide alert of the imminent danger to the Internet from the spread of the worm virus.
  There have been alerts warning of bombs being hidden in cameras, cell phones, even stuffed toys.
  Synonyms
  warning, caution, notification, notice, exhortation, injunction
2. 1.2 A period of vigilance in response to a warning of danger.
  警戒期
  traffic was halted during the alert
  警戒期间交通被中断。
  Example sentencesExamples
  In a nervous age of orange alerts, who will take the place of Mister Rogers?
  The incident follows a similar alert at a post office earlier this week.
  Thousands of holidaymakers who lost luggage following the airport security alert earlier this month are unlikely to be able to claim compensation from their insurers, it emerged last week.
  Locals say the series of explosions and alerts over the last decade have shattered their confidence in their company's ability to manage the plant without it presenting a hazard to their lives.
  The explosions came amid worldwide terror alerts and four days after a series of bombings killed 34 people.
  A crowd throw petrol bombs and stones at police and army during a security alert in west Belfast.
  The country is on a war alert following terrorist attacks on its Parliament building.
  At the same time, the government has ordered a general alert, canceling all leave and reinforcing positions.
  What To Do During Hurricane Alerts.
  How do we explain what appears to be a night and day difference between the year prior to November 2004 and the year since in terms of terror alerts and scares?
  When exercising outdoors during a smog alert, even healthy people may cough or wheeze.
  In what I earnestly hope will be a source of lessons learned, a large meteor entered Earth's atmosphere near Jakarta this weekend during a terror alert.
  Civil libertarians say the case poses a landmark test of what people can do or whom they can associate with in the age of terror alerts.
  Consideration should be given to suspending the collection of all tolls during ozone alerts
  Physicians are asking people to understand the impact smog can have on their health and to take appropriate measures to stay healthy during smog alerts.
  I think if we are going to have these high alerts in the future, I think it is incumbent on the attorney general to give us more information.
  This weekend sees terror alerts covering a great part of the world.
  The plan, devised with the help of York Council emergency planning co-ordinator Barry Kelly, aims to speed local response when an alert occurs.

verbəˈlərtəˈlərt

[with object]

Warn (someone) of a danger, threat, or problem, typically with the intention of having it avoided or dealt with.
（尤指为了避免或应付危险、威胁或问题而）提醒，警告（某人）
he alerted people to the dangers of smoking
他提醒人们注意吸烟的种种危害。
police were alerted after three men drove away without paying
三个男人没付钱就开车走掉之后，警方开始警觉起来。
Example sentencesExamples
- She let out a soft moan that would only reach Cindy's ears, alerting her of her discomfort.
- This will help avoid changes being made by someone without alerting other people.
- I mention this by way of alerting you to the only moment in the book where we feel even mildly uncomfortable.
- She gave him a pointed look, alerting him that she was aware of his duplicity.
- He alerted colleagues in a bid to warn drivers heading north on the motorway.
- A pensioner is lucky to be alive after her dog alerted her to the danger of a fire at her home
- Surely it would make more sense to put up an advert outside a football ground alerting men to the dangers of testicular or prostate cancer?
- She had just started relaxing when her laptop gave a small beep, alerting her that she had mail.
- She said the words as loud as she could without alerting the driver of the van that they were both awake.
- Marriages broke up, alerting women to the disadvantages of being financially dependent.
- Lizzie had seen the glow of the flames when she went upstairs and alerted her parents.
- Somehow, she made it out to the poolside without alerting anyone inside the house.
- To hunt a man without alerting the people is like finding a needle in a haystack.
- The ensuing silence was heavy, alerting him to just how still the room was, how lonely.
- We also implemented a new information campaign in our waiting room aimed at alerting young people to the danger of infection.
- A neighbour was alerted by the commotion and police and ambulance attended the scene.
- To be able to take the money out of her pouch without even alerting her would have taken real skill.
- Wenger did the game a service by alerting us to the dangers.
- The splash was subtle, but it made a noise that was quite loud, alerting anyone close by.
- Computers can also cut costs by alerting a physician ordering a test that it has already been done.
Synonyms
warn, notify, apprise, caution, put on one's guard, forewarn, put on the qui vive, arouse

Phrases

on the alert

Vigilant and prepared.
处于戒备状态
the security forces must be on the alert for an upsurge in violence
安全部队处于戒备状态，以防暴力升级。
Example sentencesExamples
- West was suddenly at full attention and totally on the alert.
- Still, customers must always be on the alert and must not let themselves be lured by banks into taking loans that turn into an unbearable burden.
- Now that silage and hay making is at hand, farmers must be on the alert.
- The terrorist decides where and when he will strike, while the security forces must constantly be on the alert.
- There is a constant need to keep on the alert, and I'm confident we can do that.
- After North Carolina, the trip was different because I was different, on the alert, an outsider in strange land.
- Unfortunately, managers are not always on the alert, so some incidents are not recognized as such.
- The committee appeals to everyone to exercise more vigilance and to be on the alert at all times, particularly in the run-up to Christmas.
- To avoid overlooking opportunities, we must forever be on the alert.
- The groups leadership has once again gone to ground, and security forces are on the alert.

Origin

Late 16th century (originally in military use): from French alerte, from Italian all' erta ‘to the watchtower’.

词汇	alert
释义	Definition of alert in English: alert adjective əˈləːtəˈlərt 1Quick to notice any unusual and potentially dangerous or difficult circumstances; vigilant. 警惕的，警觉的，机警的 an alert police officer discovered a lorry full of explosive 一位警惕的警官发现了一辆满载炸药的卡车。 schools need to be constantly alert to this problem 各学校对此问题应该始终保持警惕。 Example sentencesExamples There are signs that Congress is at least somewhat alert to these dangers. And shortly thereafter, several alert readers noticed something very peculiar. You begin to become more alert to your surroundings. I think they're very guarded and very alert to anything that they think might be untoward or suspicious. As you revise, you should be very alert to this point. He is very alert to matters of procedural fairness. In fact, he was very alert to the activity of the minor pieces. At the other end Dermot Byrne almost got clear but Farrell Cuddihy was very alert to clear the danger. Though at times they don't seem to be the most aware of animals, sheep are very alert to mood swings, and this time was no exception. His poetry continued as it began, very alert to Art as politically acquiescent, complicit or compromised. Firstly Ballyfin's Eoin McEvoy had to be very alert to deny Conroy. It has however been equally alert to the fact that a State might present a charge in this way, when in reality it was seeking to impede imports, or in circumstances where there was no commercial exchange at all. The man was completely alert to his surroundings. "Thanks to the efforts of police and the media, the public is more alert to these practices. He did not bother answering me, his eyes were almost closed, but the impression he gave was that he was concentrating intensely and quite alert to what was happening around us. Typically alert to nuances, he was among the first to switch into post-mortem analytic mode. So Pacific Islanders today are very alert to their ocean, and their ownership of that ocean, and their custodianship of that ocean. We were all surely alert to the subliminal messages in the deceptive modesty of his glances. One consequence is that consumers are more alert to influences than ever before. One must also be very alert to the fact that some pilgrims of certain nationalities come in bunches and batches and push their way through. Synonyms vigilant, wide awake, aware, watchful, attentive, observant, circumspect, wary, chary, heedful, canny on the lookout, on one's guard, on one's toes, all ears, keeping one's eyes open/peeled, keeping a weather eye open, on the qui vive 1.1 Able to think clearly; intellectually active. 机灵的，机敏的 she remained active and alert until well into her eighties 她80多岁时仍然活跃机敏。 Example sentencesExamples Still active and alert Mary attributes her longevity to plenty of hard work, good genes, a healthy lifestyle and a positive outlook on life in general. On his good days, he is very alert mentally and engages clearly with the issues at hand; on other days he finds it difficult to focus. In both studies, patients were alert and able to communicate by holding up fingers in response to questions and did not themselves complete the instruments. She was quite alert and was able to learn the English language rather quickly. Everyone agreed that Mr Sage was an intelligent, alert man, notwithstanding his years. Advocaat was appropriate raw material for such an alert intellect. Ms L was alert and oriented and able to move both lower extremities at the time of transfer. She was a very active and alert lady and was a founder member of Clonaslee ICA. Tanner was alert and able to answer questions but was not extremely active. At physical examination at the time of discharge, she was alert and able to converse and had limited flexion in the lower extremities. Still alert and active, she talked to the Evening Press and recalled how she managed to get the youngsters and all her family on to a ship bound for the USA in 1935. It is the first principle of an alert intellect. Surviving in a comatose state, his mind is still alert and active. I realise that I must keep mentally alert to delay the process of degeneration. ‘He was 93 but he remained mentally very alert until the very end although physically he became very ill,’ added Mr Maltin. By this time, the sedating medications usually are significantly dissipated, and the patient is alert and oriented and able to lift his or her own leg. Undemonstrative, quick-witted, alert and intelligent: he has it all. Throughout his life he remained very alert and active until very recent times. The swelling in his face is nearly gone and he's much more alert and active, which is really encouraging. ‘She is a very bright little girl, very alert,’ she said. Synonyms quick-witted, sharp, bright, quick, keen, perceptive, wide awake, responsive, agile, acute, astute informal on the ball, on one's toes, quick off the mark, quick on the uptake, all there, with it, bright-eyed and bushy-tailed noun əˈləːtəˈlərt mass noun 1The state of being watchful for possible danger. 警惕，警戒 security forces are on the alert for an upsurge in violence 安全部队处于戒备状态，以防暴力升级。 Example sentencesExamples But the industry was put on alert about the possible tax rises at a conference this month when a representative from the Revenue said the memoranda would need to be reviewed. Initially, the company was put on alert for possible participation in an airport security mission. Hospitals and doctors have been placed on alert to be prepared to quarantine patients suspected of suffering from the early stages of the virus. Forestry Minister John Browne has urged forest owners to be prepared and on alert and to help to stamp out fires in plantations. However, as they approached and she saw the ambulance and all the patrol cars, she put her defenses on alert and prepared herself for anything. Medical staff in Scarborough have been put on alert for possible infections after a patient at the resort's hospital died of pneumonia. And now, as his execution by lethal injection nears, some clinics providing abortions are on alert for possible violence. But despite the favorable atmosphere, police remained on alert for possible security threats on the session, the officer said. So, it makes sense to be on alert in a cautious, sensible way all throughout the country. No matter how carefully drivers stay on alert against unexpected pedestrians rushing out in front of them, disasters will still occur and there are always casualties. This was not the case with security forces, however, who remained on alert against possible terror attacks. And Ergon Energy stockpiled materials and put crews on alert yesterday in preparation for possible damage to the electricity network. The main north-south highway was reopened on Thursday but motorists were urged to remain on alert against possible dangers caused by the continuing heavy rains. Police guarded key sites in New York, on alert for possible truck bombs, suicide bombers and chemical and biological attack. Dalton sees the handwriting on the wall and wants to put the town on alert for possible evacuation, but the request is refused by his politically conscious superior. It's still pretty high, but even if it does, we can be on alert to get out of here as soon as possible. Greater Manchester was put on alert today as firemen prepared for the start of a national strike. France was on alert yesterday for a possible upsurge of violence as the country headed into a long holiday weekend, two weeks after rioting broke out in a run-down suburb of the capital. The President had urged the public to be on alert for possible terrorist actions in September or October. Army reserve units have also been placed on alert for possible call-up. Synonyms vigilance, watchfulness, carefulness, attentiveness, guardedness, care, caution, cautiousness, wariness, chariness, alertness, circumspection, prudence, heedfulness, heed, mindfulness 1.1count noun An announcement or signal warning of danger. 警报，警示 a bomb alert 轰炸警报。 Example sentencesExamples When I woke up yesterday morning, my Inbox was flooded with news alerts from Karbala, Iskandariyah and Babil. Preventive alerts and warnings sometimes issued at the local level were not repeated nationally. The all-clear had in fact sounded from an initial alert when the bomb was dropped. If a flood alert is issued, the Association of British Insurers advises that valuables and furniture are shifted to higher floors. There has been a continual stream of bomb alerts. On Tuesday computer security experts issued a worldwide alert of the imminent danger to the Internet from the spread of the worm virus. The district administration has sounded an alert. Meanwhile there are fresh alerts of bomb attacks raised. A flood alert was sounded in Kinnaur, Shimla, Kulu and Mandi districts last evening after water started overflowing from the lake, bringing along a lot of silt. ‘These floods are an alert,’ said Dr Mike Hulme, reader in climatology in the climate research unit at the University of East Anglia. There were also bomb alerts in Philadelphia and Washington. Yes, it's frustrating to have alerts sounded and then have nothing happen. In future, flood alerts will be sent out by text message and mobile phone calls as well as pagers, and the agency's website is also being upgraded so it can better handle sudden surges in the number of ‘hits’ during floods. The Environment Agency is hoping to be able to issue flood alerts for all major watercourses in the future. Normally it sounds text-message alerts about 90 times a day. There have been alerts warning of bombs being hidden in cameras, cell phones, even stuffed toys. Some of his public alerts sound quite fanciful. Science may not yet be able to predict earthquakes with complete accuracy, but an early warning network exists in the Pacific Ocean to issue alerts about the danger of tsunamis. A bomb alert was issued at a post office in Germany this week after a package waiting to be delivered began vibrating and emitting a strange noise. The Environment Agency issued flood alerts for several rivers and part of the A12 was sealed off. Synonyms warning, caution, notification, notice, exhortation, injunction siren, alarm, signal, danger signal, distress signal 1.2count noun A period of vigilance following a warning of danger. 警戒期 traffic was halted during the alert 警戒期间交通被中断。 Example sentencesExamples Civil libertarians say the case poses a landmark test of what people can do or whom they can associate with in the age of terror alerts. The explosions came amid worldwide terror alerts and four days after a series of bombings killed 34 people. Consideration should be given to suspending the collection of all tolls during ozone alerts This weekend sees terror alerts covering a great part of the world. At the same time, the government has ordered a general alert, canceling all leave and reinforcing positions. Physicians are asking people to understand the impact smog can have on their health and to take appropriate measures to stay healthy during smog alerts. The incident follows a similar alert at a post office earlier this week. In what I earnestly hope will be a source of lessons learned, a large meteor entered Earth's atmosphere near Jakarta this weekend during a terror alert. How do we explain what appears to be a night and day difference between the year prior to November 2004 and the year since in terms of terror alerts and scares? The plan, devised with the help of York Council emergency planning co-ordinator Barry Kelly, aims to speed local response when an alert occurs. In a nervous age of orange alerts, who will take the place of Mister Rogers? Thousands of holidaymakers who lost luggage following the airport security alert earlier this month are unlikely to be able to claim compensation from their insurers, it emerged last week. The country is on a war alert following terrorist attacks on its Parliament building. What To Do During Hurricane Alerts. Locals say the series of explosions and alerts over the last decade have shattered their confidence in their company's ability to manage the plant without it presenting a hazard to their lives. When exercising outdoors during a smog alert, even healthy people may cough or wheeze. A crowd throw petrol bombs and stones at police and army during a security alert in west Belfast. I think if we are going to have these high alerts in the future, I think it is incumbent on the attorney general to give us more information. 1.3count noun A signal on an electronic device that prompts the user to do something or attracts their attention. （电子设备的）提示信号 a vibrating alert is a discreet alternative to ringtones 相对于铃声信号而言，振动提示信号是一种谨慎的替代手段。 Example sentencesExamples It took a little getting used to, but after a while, I realised I was back in Singapore, where it doesn't matter if phones ring or SMS alerts beep loudly on the trains. For example, certain software programs allow users to send e-mail alerts. In this way, this solution will typically filter the number of alerts from security devices down by a factor of 1000 or more. Today's edition carries a security alert for users of Windows. This software can now, for example, send out a real-time alert to Outlook users when it picks up on an appointment conflict. And if you want to be alerted when a new user is added to the system, ask for alerts on users. Whenever the number of deaths rises or falls unexpectedly, the software triggers an alert which prompts a clinical investigation into the possible causes. Capabilities are provided for automating customer service requirements and the system provides alerts to tell users when a problem has occurred, such as an invoice that has not been paid. Pop-up ads disguised as Windows system administration alerts annoy users and puzzle security experts. However, it was the features of the new release that stood out: the product will now support foreign keys, stored procedures and database alerts. Local severe weather alerts, delivered to city Web pages and individually to e-mail, cell phones or personal digit assistants. With the ability to receive simple text messages, Wall Street traders now get real-time alerts whenever a major deal is carried out in overseas financial markets. There is a hands-free speaker mode and a vibrate alert. These bogus alerts directed users to a maliciously constructed Web site run by Papierniak, instead of the genuine PayPal site. The software will send out an alert when the user reaches his or her threshold and can also automatically free up more space for the user, if desired. Register and sign up for your own personalized ticker, and get special news and even e-mail alerts about stocks that matter to you. It is forecast that in the future mobile phones will be used to send multimedia alerts, with audio and images, and electronic greeting cards. In addition, our company has also introduced SMS alerts for worldwide parcel deliveries. Still others offer wedding registry data, sports results and even terror alerts. With the news alerts tool, users type in the news topic they would like to track, and choose whether they would like to receive bulletins once a day or ‘as it happens.’ Synonyms audible warning, purr, purring, ring, ringing, note, tone, beep, bleep, meep, warble, signal, alarm verb əˈləːtəˈlərt [with object] Warn (someone) of a danger or problem. he alerted people to the dangers of smoking 他提醒人们注意吸烟的种种危害。 police were alerted after three men drove away without paying 三个男人没付钱就开车走掉之后，警方开始警觉起来。 Example sentencesExamples Surely it would make more sense to put up an advert outside a football ground alerting men to the dangers of testicular or prostate cancer? Somehow, she made it out to the poolside without alerting anyone inside the house. She said the words as loud as she could without alerting the driver of the van that they were both awake. A neighbour was alerted by the commotion and police and ambulance attended the scene. She had just started relaxing when her laptop gave a small beep, alerting her that she had mail. A pensioner is lucky to be alive after her dog alerted her to the danger of a fire at her home He alerted colleagues in a bid to warn drivers heading north on the motorway. To be able to take the money out of her pouch without even alerting her would have taken real skill. Computers can also cut costs by alerting a physician ordering a test that it has already been done. The splash was subtle, but it made a noise that was quite loud, alerting anyone close by. We also implemented a new information campaign in our waiting room aimed at alerting young people to the danger of infection. She let out a soft moan that would only reach Cindy's ears, alerting her of her discomfort. Wenger did the game a service by alerting us to the dangers. Marriages broke up, alerting women to the disadvantages of being financially dependent. I mention this by way of alerting you to the only moment in the book where we feel even mildly uncomfortable. Lizzie had seen the glow of the flames when she went upstairs and alerted her parents. The ensuing silence was heavy, alerting him to just how still the room was, how lonely. She gave him a pointed look, alerting him that she was aware of his duplicity. To hunt a man without alerting the people is like finding a needle in a haystack. This will help avoid changes being made by someone without alerting other people. Synonyms warn, notify, apprise, caution, put on one's guard, forewarn, put on the qui vive, arouse informal tip off, clue in, put in the picture, put wise Derivatives alertly adverb əˈləːtliəˈlərtli But I was grateful to the copy editor for reading the book sufficiently alertly to have noticed. Example sentencesExamples An original thinker always alertly attuned to contemporary culture, he was admired for his intellectual style and the felicity with which he expressed his ideas in his many books and articles. Thankfully, however, the deer do wise up quickly, alertly scanning their surroundings for different sounds or a hint of movement that wasn't there the day before. Both Aaron and Ryan moved carefully and alertly, and Ryan had his sword drawn. They look at the little vehicle curiously but not very alertly. Origin Late 16th century (originally in military use): from French alerte, from Italian all' erta 'to the watchtower'. This comes from the Italian military phrase all' erta, ‘on the lookout’ or, more literally, ‘to the watchtower’. It was originally a military term in English too, before it acquired its more general meaning. Alert was first used as an adverb, so you could say that the later expression on the alert strictly means ‘on the on the lookout’. Rhymes advert, animadvert, assert, avert, Bert, blurt, Burt, cert, chert, concert, controvert, convert, curt, desert, dessert, dirt, divert, exert, flirt, girt, hurt, inert, insert, introvert, Kurt, malapert, overt, pert, quirt, shirt, skirt, spirt, spurt, squirt, Sturt, subvert, vert, wort, yurt Definition of alert in US English: alert adjectiveəˈlərtəˈlərt 1Quick to notice any unusual and potentially dangerous or difficult circumstances; vigilant. 警惕的，警觉的，机警的 an alert police officer discovered a truck full of explosives 一位警惕的警官发现了一辆满载炸药的卡车。 schools need to be constantly alert to this problem 各学校对此问题应该始终保持警惕。 Example sentencesExamples There are signs that Congress is at least somewhat alert to these dangers. Though at times they don't seem to be the most aware of animals, sheep are very alert to mood swings, and this time was no exception. His poetry continued as it began, very alert to Art as politically acquiescent, complicit or compromised. At the other end Dermot Byrne almost got clear but Farrell Cuddihy was very alert to clear the danger. In fact, he was very alert to the activity of the minor pieces. As you revise, you should be very alert to this point. Typically alert to nuances, he was among the first to switch into post-mortem analytic mode. So Pacific Islanders today are very alert to their ocean, and their ownership of that ocean, and their custodianship of that ocean. It has however been equally alert to the fact that a State might present a charge in this way, when in reality it was seeking to impede imports, or in circumstances where there was no commercial exchange at all. And shortly thereafter, several alert readers noticed something very peculiar. The man was completely alert to his surroundings. You begin to become more alert to your surroundings. He did not bother answering me, his eyes were almost closed, but the impression he gave was that he was concentrating intensely and quite alert to what was happening around us. We were all surely alert to the subliminal messages in the deceptive modesty of his glances. I think they're very guarded and very alert to anything that they think might be untoward or suspicious. He is very alert to matters of procedural fairness. One consequence is that consumers are more alert to influences than ever before. "Thanks to the efforts of police and the media, the public is more alert to these practices. One must also be very alert to the fact that some pilgrims of certain nationalities come in bunches and batches and push their way through. Firstly Ballyfin's Eoin McEvoy had to be very alert to deny Conroy. Synonyms vigilant, wide awake, aware, watchful, attentive, observant, circumspect, wary, chary, heedful, canny 1.1 Able to think clearly; intellectually active. 机灵的，机敏的 she remained active and alert until well into her eighties 她80多岁时仍然活跃机敏。 Example sentencesExamples She was quite alert and was able to learn the English language rather quickly. In both studies, patients were alert and able to communicate by holding up fingers in response to questions and did not themselves complete the instruments. Still alert and active, she talked to the Evening Press and recalled how she managed to get the youngsters and all her family on to a ship bound for the USA in 1935. Still active and alert Mary attributes her longevity to plenty of hard work, good genes, a healthy lifestyle and a positive outlook on life in general. Throughout his life he remained very alert and active until very recent times. She was a very active and alert lady and was a founder member of Clonaslee ICA. Undemonstrative, quick-witted, alert and intelligent: he has it all. It is the first principle of an alert intellect. Advocaat was appropriate raw material for such an alert intellect. On his good days, he is very alert mentally and engages clearly with the issues at hand; on other days he finds it difficult to focus. Surviving in a comatose state, his mind is still alert and active. At physical examination at the time of discharge, she was alert and able to converse and had limited flexion in the lower extremities. The swelling in his face is nearly gone and he's much more alert and active, which is really encouraging. I realise that I must keep mentally alert to delay the process of degeneration. ‘She is a very bright little girl, very alert,’ she said. Tanner was alert and able to answer questions but was not extremely active. By this time, the sedating medications usually are significantly dissipated, and the patient is alert and oriented and able to lift his or her own leg. Ms L was alert and oriented and able to move both lower extremities at the time of transfer. ‘He was 93 but he remained mentally very alert until the very end although physically he became very ill,’ added Mr Maltin. Everyone agreed that Mr Sage was an intelligent, alert man, notwithstanding his years. Synonyms quick-witted, sharp, bright, quick, keen, perceptive, wide awake, responsive, agile, acute, astute nounəˈlərtəˈlərt 1The state of being watchful for possible danger. 警惕，警戒 security forces were placed on alert 安全部队处于警戒状态。 Example sentencesExamples Army reserve units have also been placed on alert for possible call-up. Medical staff in Scarborough have been put on alert for possible infections after a patient at the resort's hospital died of pneumonia. And Ergon Energy stockpiled materials and put crews on alert yesterday in preparation for possible damage to the electricity network. Forestry Minister John Browne has urged forest owners to be prepared and on alert and to help to stamp out fires in plantations. This was not the case with security forces, however, who remained on alert against possible terror attacks. Police guarded key sites in New York, on alert for possible truck bombs, suicide bombers and chemical and biological attack. Hospitals and doctors have been placed on alert to be prepared to quarantine patients suspected of suffering from the early stages of the virus. But despite the favorable atmosphere, police remained on alert for possible security threats on the session, the officer said. The main north-south highway was reopened on Thursday but motorists were urged to remain on alert against possible dangers caused by the continuing heavy rains. Dalton sees the handwriting on the wall and wants to put the town on alert for possible evacuation, but the request is refused by his politically conscious superior. It's still pretty high, but even if it does, we can be on alert to get out of here as soon as possible. No matter how carefully drivers stay on alert against unexpected pedestrians rushing out in front of them, disasters will still occur and there are always casualties. And now, as his execution by lethal injection nears, some clinics providing abortions are on alert for possible violence. The President had urged the public to be on alert for possible terrorist actions in September or October. However, as they approached and she saw the ambulance and all the patrol cars, she put her defenses on alert and prepared herself for anything. But the industry was put on alert about the possible tax rises at a conference this month when a representative from the Revenue said the memoranda would need to be reviewed. So, it makes sense to be on alert in a cautious, sensible way all throughout the country. Initially, the company was put on alert for possible participation in an airport security mission. Greater Manchester was put on alert today as firemen prepared for the start of a national strike. France was on alert yesterday for a possible upsurge of violence as the country headed into a long holiday weekend, two weeks after rioting broke out in a run-down suburb of the capital. Synonyms vigilance, watchfulness, carefulness, attentiveness, guardedness, care, caution, cautiousness, wariness, chariness, alertness, circumspection, prudence, heedfulness, heed, mindfulness 1.1 An announcement or signal warning of danger. 警报，警示 a bomb alert 轰炸警报。 an alert sounded and all the fighters took off 警报响了，所有的战斗机随之起飞。 Example sentencesExamples In future, flood alerts will be sent out by text message and mobile phone calls as well as pagers, and the agency's website is also being upgraded so it can better handle sudden surges in the number of ‘hits’ during floods. ‘These floods are an alert,’ said Dr Mike Hulme, reader in climatology in the climate research unit at the University of East Anglia. The all-clear had in fact sounded from an initial alert when the bomb was dropped. Some of his public alerts sound quite fanciful. If a flood alert is issued, the Association of British Insurers advises that valuables and furniture are shifted to higher floors. A bomb alert was issued at a post office in Germany this week after a package waiting to be delivered began vibrating and emitting a strange noise. The Environment Agency issued flood alerts for several rivers and part of the A12 was sealed off. The Environment Agency is hoping to be able to issue flood alerts for all major watercourses in the future. When I woke up yesterday morning, my Inbox was flooded with news alerts from Karbala, Iskandariyah and Babil. There has been a continual stream of bomb alerts. A flood alert was sounded in Kinnaur, Shimla, Kulu and Mandi districts last evening after water started overflowing from the lake, bringing along a lot of silt. Meanwhile there are fresh alerts of bomb attacks raised. Yes, it's frustrating to have alerts sounded and then have nothing happen. Normally it sounds text-message alerts about 90 times a day. Science may not yet be able to predict earthquakes with complete accuracy, but an early warning network exists in the Pacific Ocean to issue alerts about the danger of tsunamis. The district administration has sounded an alert. Preventive alerts and warnings sometimes issued at the local level were not repeated nationally. There were also bomb alerts in Philadelphia and Washington. On Tuesday computer security experts issued a worldwide alert of the imminent danger to the Internet from the spread of the worm virus. There have been alerts warning of bombs being hidden in cameras, cell phones, even stuffed toys. Synonyms warning, caution, notification, notice, exhortation, injunction 1.2 A period of vigilance in response to a warning of danger. 警戒期 traffic was halted during the alert 警戒期间交通被中断。 Example sentencesExamples In a nervous age of orange alerts, who will take the place of Mister Rogers? The incident follows a similar alert at a post office earlier this week. Thousands of holidaymakers who lost luggage following the airport security alert earlier this month are unlikely to be able to claim compensation from their insurers, it emerged last week. Locals say the series of explosions and alerts over the last decade have shattered their confidence in their company's ability to manage the plant without it presenting a hazard to their lives. The explosions came amid worldwide terror alerts and four days after a series of bombings killed 34 people. A crowd throw petrol bombs and stones at police and army during a security alert in west Belfast. The country is on a war alert following terrorist attacks on its Parliament building. At the same time, the government has ordered a general alert, canceling all leave and reinforcing positions. What To Do During Hurricane Alerts. How do we explain what appears to be a night and day difference between the year prior to November 2004 and the year since in terms of terror alerts and scares? When exercising outdoors during a smog alert, even healthy people may cough or wheeze. In what I earnestly hope will be a source of lessons learned, a large meteor entered Earth's atmosphere near Jakarta this weekend during a terror alert. Civil libertarians say the case poses a landmark test of what people can do or whom they can associate with in the age of terror alerts. Consideration should be given to suspending the collection of all tolls during ozone alerts Physicians are asking people to understand the impact smog can have on their health and to take appropriate measures to stay healthy during smog alerts. I think if we are going to have these high alerts in the future, I think it is incumbent on the attorney general to give us more information. This weekend sees terror alerts covering a great part of the world. The plan, devised with the help of York Council emergency planning co-ordinator Barry Kelly, aims to speed local response when an alert occurs. verbəˈlərtəˈlərt [with object] Warn (someone) of a danger, threat, or problem, typically with the intention of having it avoided or dealt with. （尤指为了避免或应付危险、威胁或问题而）提醒，警告（某人） he alerted people to the dangers of smoking 他提醒人们注意吸烟的种种危害。 police were alerted after three men drove away without paying 三个男人没付钱就开车走掉之后，警方开始警觉起来。 Example sentencesExamples She let out a soft moan that would only reach Cindy's ears, alerting her of her discomfort. This will help avoid changes being made by someone without alerting other people. I mention this by way of alerting you to the only moment in the book where we feel even mildly uncomfortable. She gave him a pointed look, alerting him that she was aware of his duplicity. He alerted colleagues in a bid to warn drivers heading north on the motorway. A pensioner is lucky to be alive after her dog alerted her to the danger of a fire at her home Surely it would make more sense to put up an advert outside a football ground alerting men to the dangers of testicular or prostate cancer? She had just started relaxing when her laptop gave a small beep, alerting her that she had mail. She said the words as loud as she could without alerting the driver of the van that they were both awake. Marriages broke up, alerting women to the disadvantages of being financially dependent. Lizzie had seen the glow of the flames when she went upstairs and alerted her parents. Somehow, she made it out to the poolside without alerting anyone inside the house. To hunt a man without alerting the people is like finding a needle in a haystack. The ensuing silence was heavy, alerting him to just how still the room was, how lonely. We also implemented a new information campaign in our waiting room aimed at alerting young people to the danger of infection. A neighbour was alerted by the commotion and police and ambulance attended the scene. To be able to take the money out of her pouch without even alerting her would have taken real skill. Wenger did the game a service by alerting us to the dangers. The splash was subtle, but it made a noise that was quite loud, alerting anyone close by. Computers can also cut costs by alerting a physician ordering a test that it has already been done. Synonyms warn, notify, apprise, caution, put on one's guard, forewarn, put on the qui vive, arouse Phrases on the alert Vigilant and prepared. 处于戒备状态 the security forces must be on the alert for an upsurge in violence 安全部队处于戒备状态，以防暴力升级。 Example sentencesExamples West was suddenly at full attention and totally on the alert. Still, customers must always be on the alert and must not let themselves be lured by banks into taking loans that turn into an unbearable burden. Now that silage and hay making is at hand, farmers must be on the alert. The terrorist decides where and when he will strike, while the security forces must constantly be on the alert. There is a constant need to keep on the alert, and I'm confident we can do that. After North Carolina, the trip was different because I was different, on the alert, an outsider in strange land. Unfortunately, managers are not always on the alert, so some incidents are not recognized as such. The committee appeals to everyone to exercise more vigilance and to be on the alert at all times, particularly in the run-up to Christmas. To avoid overlooking opportunities, we must forever be on the alert. The groups leadership has once again gone to ground, and security forces are on the alert. Origin Late 16th century (originally in military use): from French alerte, from Italian all' erta ‘to the watchtower’. adj.1 phr.
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