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alert

verb
 
🔊/əˈlɜːt/
🔊/əˈlɜːrt/
[often passive]
Verb Forms
present simple I / you / we / they alert
🔊/əˈlɜːt/
🔊/əˈlɜːrt/
he / she / it alerts
🔊/əˈlɜːts/
🔊/əˈlɜːrts/
past simple alerted
🔊/əˈlɜːtɪd/
🔊/əˈlɜːrtɪd/
past participle alerted
🔊/əˈlɜːtɪd/
🔊/əˈlɜːrtɪd/
-ing form alerting
🔊/əˈlɜːtɪŋ/
🔊/əˈlɜːrtɪŋ/
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  1.  
    to warn somebody about a dangerous situation or one that requires immediate action向…报警；使警觉；使警惕；使戒备
    • alert somebody Neighbours quickly alerted the emergency services.邻居很快向应急服务机构报了警。🔊🔊
    • (be) alerted by something Alerted by a noise downstairs, he sat up and turned on the light.楼下的响声使他警觉，他坐起来打开灯。🔊🔊
    • be alerted that… The coastguard were alerted that a yacht had run into difficulties.海岸警卫队得知一艘游艇遇到困难。
    Topics Dangerc1, War and conflictc1
  2.  
    to make somebody aware of something使意识到；使认识到
    • be alerted to something They had been alerted to the possibility of further price rises.他们已意识到价格可能继续上涨。🔊🔊

alert

noun
 
🔊/əˈlɜːt/
🔊/əˈlɜːrt/
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  1.  
    [singular, uncountable] a situation in which people are watching for danger and ready to deal with it警戒；戒备；警惕
    • on the alert (for something) Police are warning the public to be on the alert for suspicious packages.警方警告公众要警惕可疑包裹。🔊🔊
    • on alert More than 5 000 troops have been placed on (full) alert.5 000 多名士兵已处于（全面）戒备状态。
    Extra Examples
    • The army was yesterday placed on a state of alert in case of more riots.军队昨天处于戒备状态以防出现更多的暴乱。
    • Thousands of police were put on full alert at all main roads leading to the city.在通向该城市的所有主要道路上有特派的数千警察全面戒备。
    • You should always be on the alert for anyone who looks suspicious.你们应该时刻密切注意形迹可疑的人。
    Topics Dangerc1, War and conflictc1
    Oxford Collocations Dictionaryadjective
    • heightened
    • high
    • full
    • …
    verb + alert
    • issue
    • put out
    • raise
    • …
    alert + verb
    • go out
    preposition
    • on the alert
    • alert for
    phrases
    • be on full alert
    • place somebody on alert
    • put somebody on alert
    • …
    See full entry
  2.  
    [countable] a warning of danger or of a problem警报
    • a bomb/fire alert炸弹／火警警报
    Wordfinder
    see also bomb alert, red alert
    Extra Examples
    • A nationwide alert went out for three escaped prisoners.全国范围内发布了警报，搜捕 3 名越狱逃犯。
    • A security alert was issued after four men escaped from the prison.4 名罪犯越狱后，当局发出安全警报。
    • Receive regular email alerts about breaking news.定时接收有关爆炸式新闻的电子邮件提醒。
    • The alert was called off when it was found that the bomb was not live.发现炸弹未装炸药时，警报就解除了。
    • They rang the church bells to sound the alert and the villagers then fled.他们敲响教堂的钟来发出警报，村民随即逃走。
    • A bomb alert forced staff to evacuate the building for several hours.炸弹警报迫使工作人员撤离该建筑物数小时。
    • A flood alert has been issued in the city after last night's heavy rain.昨夜暴雨过后，这个城市发出了洪水预警。
    Topics Dangerc1, War and conflictc1
    Oxford Collocations Dictionaryadjective
    • heightened
    • high
    • full
    • …
    verb + alert
    • issue
    • put out
    • raise
    • …
    alert + verb
    • go out
    preposition
    • on the alert
    • alert for
    phrases
    • be on full alert
    • place somebody on alert
    • put somebody on alert
    • …
    See full entry
    3. Word Originlate 16th cent. (originally in military use): from French alerte, from Italian all' erta ‘to the watchtower’.

alert

adjective
 
🔊/əˈlɜːt/
🔊/əˈlɜːrt/
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  1.  
    able to think quickly; quick to notice things警觉的；警惕的；戒备的
    • Suddenly he found himself awake and fully alert.突然他发觉自己醒了过来，而且高度警觉。🔊🔊
    • Two alert scientists spotted the mistake.两个警觉的科学家发现了这个错误。🔊🔊
    • Try to stay alert while driving at night.晚上开车时尽量保持警觉。
    • an alert mind机警的头脑
    • mentally alert机警
    Extra Examples
    • The machine should help to keep the pilot alert.机器会帮助飞行员保持警觉。
    • There was a noise outside and he was suddenly alert.外面有声响，他突然警觉起来。
    Oxford Collocations Dictionaryverbs
    • be
    • look
    • seem
    • …
    adverb
    • extremely
    • fairly
    • very
    • …
    preposition
    • to
    See full entry
  2.  
    alert to something aware of something, especially a problem or danger意识到，注意到（问题或危险）
    • We must be alert to the possibility of danger.我们必须认识到危险发生的可能性。🔊🔊
    • She was alert to the slightest sound.她警惕着一点声音。
    Topics Dangerc1
    Oxford Collocations Dictionaryverbs
    • be
    • look
    • seem
    • …
    adverb
    • extremely
    • fairly
    • very
    • …
    preposition
    • to
    See full entry
    3. Word Originlate 16th cent. (originally in military use): from French alerte, from Italian all' erta ‘to the watchtower’.