| 单词 | alert |
| 释义 | alert (once / 290 pages) 1vn 2adj Alert! Alert! Alert! Did I get your attention? When you are alert, you are awake and ready. When you issue an alert you give warning, alerting people to, or notifying them of, a concern. Alert is one of the rare words that can be used in the same form as a noun, verb, and adjective. In all parts of speech, alert implies preparedness. The word is derived from the French a l'erte which translates to "on the watch." When you hear the word, imagine an alarm going off. The alarm is the alert. When you hear it, you have been alerted and you are now alert. WORD FAMILYalert: alerted, alerter, alerting, alertly, alertness, alerts, unalert+/alertness: alertnesses USAGE EXAMPLESSunwing’s gate agents found the pilot’s behavior to be unusual and alerted the co-pilot. New York Times(Jan 02, 2017) Smarter Applications is launching a fridge webcam at CES that alerts owners to when food nears its expiry date. BBC(Jan 02, 2017) Spoiler alert: this recap contains spoilers to the Sherlock episode The Six Thatchers, which aired on 1 January 2017. The Guardian(Jan 02, 2017) 1 1v warn or arouse to a sense of danger or call to a state of preparedness We alerted the new neighbors to the high rate of burglaries Syn|Hypo|Hyper alarm wake make aware of warn notify of danger, potential harm, or risk 2n condition of heightened watchfulness or preparation for action bombers were put on alert during the crisis Syn|Hypo|Hyper qui vive air alert the condition in which combat aircraft are airborne and ready for an operation red alertthe highest level of alert when an attack by the enemy seems imminent (or more generally a state of alert resulting from imminent danger) strip alerta state of readiness for domestic defense aircraft preparation, preparedness, readiness the state of having been made ready or prepared for use or action (especially military action) 3n an automatic signal (usually a sound) warning of danger Syn|Hypo|Hyper alarm, alarum, warning signal torpedo a small explosive device that is placed on a railroad track and fires when a train runs over it; the sound of the explosion warns the engineer of danger ahead air alertthe warning signal that begins a period of preparation for an enemy air attack burglar alarma loud warning signal produced by a burglar alarm fire alarma shout or bell to warn that fire has broken out foghorn, fogsignala loud low warning signal that can be heard by fogbound ships horna noise made by the driver of an automobile to give warning; red flaga flag that serves as a warning signal sirena warning signal that is a loud wailing sound alarm bell, tocsinthe sound of an alarm (usually a bell) sign, signal, signaling any nonverbal action or gesture that encodes a message 4n a warning that serves to make you more alert to danger 2Syn|Exp|Hyper alerting Emergency Alert System a federal warning system that is activated by FEMA; enables the President to take over the United States airwaves to warn the whole country of major catastrophic events warning a message informing of danger 1adj mentally perceptive and responsive;"an alert mind" alert to the problems Syn alive, awake aware, cognisant, cognizant (sometimes followed by `of') having or showing knowledge or understanding or realization or perception 2adj engaged in or accustomed to close observation caught by a couple of alert cops alert enough to spot the opportunity when it came constantly alert and vigilant, like a sentinel on duty Syn|Ant watchful argus-eyed, open-eyed, vigilant, wakeful carefully observant or attentive; on the lookout for possible danger fly(British informal) not to be deceived or hoodwinked heads-up, wide-awakefully alert and watchful lidless, sleeplessalways watchful warymarked by keen caution and watchful prudence awakenot in a state of sleep; completely conscious livelyfull of life and energy unalert, unvigilant, unwatchful not alert to what is potentially dangerous unwarynot alert to danger or deception 3adj quick and energetic Syn brisk, lively, merry, rattling, snappy, spanking, zippy energetic possessing or exerting or displaying energy |
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