alert

英 [əˈlɜːt]

美 [əˈlɜːrt]

adj.  警觉的; 警惕的; 戒备的; 意识到; 注意到
v.  向…报警; 使警觉; 使警惕; 使戒备; 使意识到; 使认识到
n.  警戒; 戒备; 警惕; 警报

过去分词：alerted　过去式：alerted　现在分词：alerting　第三人称单数：alerts　复数：alerts　

CET4CET6考研TOEFLGREIELTSTEM8

Collins.3 / BNC.4966 / COCA.5318

同义词辨析

bewarealert【导航词义：小心，使警觉】

牛津词典

adj.

• 警觉的；警惕的；戒备的
  able to think quickly; quick to notice things
  1. 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。
  2. Two alert scientists spotted the mistake.
     两个警觉的科学家发现了这个错误。
• 意识到；注意到
  aware of sth, especially a problem or danger
  1. We must be alert to the possibility of danger.
     我们必须认识到危险的可能性。

verb

• 向…报警；使警觉；使警惕；使戒备
  to warn sb about a dangerous or urgent situation
  1. Neighbours quickly alerted the emergency services.
     邻居很快向紧急情况服务部门报了警。
  2. 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。
• 使意识到；使认识到
  to make sb aware of sth
  1. 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。

noun

• 警戒；戒备；警惕
  a situation in which people are watching for danger and ready to deal with it
  1. 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。
  2. 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。
• 警报
  a warning of danger or of a problem
  1. a bomb/fire alert
     炸弹 / 火警警报

柯林斯词典

• ADJ-GRADED 警觉的；警惕的；留神的；机敏的
  If you arealert, you are paying full attention to things around you and are able to deal with anything that might happen.
  1. We all have to stay alert...
     我们大家都必须保持警惕。
  2. He had been spotted by an alert neighbour.
     一个警觉的邻居发现了他。
• ADJ-GRADED 充分意识到…的;完全感觉到…的
  If you arealert tosomething, you are fully aware of it.
  1. The bank is alert to the danger.
     银行充分意识到了危险。
• N-COUNT 警戒（状态）；戒备（状态）
  Analertis a situation in which people prepare themselves for something dangerous that might happen soon.
  1. Due to a security alert, this train will not be stopping at Oxford Circus.
     由于安全戒备的原因，该次列车在“牛津街口广场”站将不停留。
• VERB 向…报警；使警觉；使警惕；使注意
  If youalertsomeonetoa situation, especially a dangerous or unpleasant situation, you tell them about it.
  1. He wanted to alert people to the activities of the group...
     他想提醒人们小心该团体的活动。
  2. I was hoping he'd alert the police.
     我当时希望他会报警。
• See also:red alert
• PHRASE 处于警戒状态;保持戒备
  If soldiers or police areon alert, they are ready to deal with anything that may happen.
  1. Soldiers and police have been put on alert.
     士兵和警方都已进入警戒状态。
• PHRASE 准备就绪；防备着
  If you areon the alert forsomething, you are ready to deal with it if it happens.
  1. They want to be on the alert for similar buying opportunities.
     他们希望随时掌握有关类似购买机会的信息。

英英释义

noun

• an automatic signal (usually a sound) warning of danger
  Synonym:alarmwarning signalalarum
• a warning serves to make you more alert to danger
  Synonym:alerting
• condition of heightened watchfulness or preparation for action
  1. bombers were put on alert during the crisis
  Synonym:qui vive

verb

• warn or arouse to a sense of danger or call to a state of preparedness
  1. The empty house alarmed him
  2. We alerted the new neighbors to the high rate of burglaries
  Synonym:alarm

adj

• engaged in or accustomed to close observation
  1. caught by a couple of alert cops
  2. alert enough to spot the opportunity when it came
  3. constantly alert and vigilant, like a sentinel on duty
  Synonym:watchful
• mentally perceptive and responsive
  1. alert to the problems
  2. alive to what is going on
  3. awake to the dangers of her situation
  4. was now awake to the reality of his predicament
  Synonym:alive(p)awake(p)
• quick and energetic
  1. a brisk walk in the park
  2. a lively gait
  3. a merry chase
  4. traveling at a rattling rate
  5. a snappy pace
  6. a spanking breeze
  Synonym:brisklivelymerryrattlingsnappyspankingzippy

双语例句

• He is always alert to danger.
  他对危险时刻保持警惕。
• He had been spotted by an alert neighbour.
  一个警觉的邻居发现了他。
• The hurricane alert is over.
  飓风警报解除了。
• The bank is alert to the danger.
  银行充分意识到了危险。
• Sirens sounded an end to the red alert.
  警报声宣告了红色预警的结束。
• Bedrooms are fitted with alarm pull cords to alert the manager in an emergency.
  卧室中装有警报器拉绳，遇到紧急情况时可向经理报警。
• The armed forces were on high alert to guard against any retaliation.
  武装部队保持高度戒备，以防发生任何报复行动。
• The cat is alert to every sound and movement.
  那只猫对任何响动都很警觉。
• This is a very alert child.
  这个孩子灵极了。
• They were constantly on the alert not to be taken by surprise.
  他们一直处于常备不懈状态以防突然袭击。