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1. Dictionary

   A·lert

   /əˈlərt/

   

   adjective

   • 1. quick to notice any unusual and potentially dangerous or difficult circumstances; vigilant: "an alert police officer discovered a truck full of explosives" Similar vigilanthypervigilantwide awakeawarewatchfulattentiveobservantcircumspectwarycharyheedfulcannyon the lookouton one's guardon one's toesall earskeeping one's eyes open/peeledkeeping a weather eye openon the qui viveOpposite inattentive
   • ▪ able to think clearly; intellectually active: "she remained active and alert until well into her eighties" Similar quick-wittedsharpbrightquickkeenperceptivewide awakeresponsiveagileacuteastuteinformal:on the ballon one's toesquick off the markquick on the uptakeall therewith itbright-eyed and bushy-tailedOpposite slow

   noun

   • 1. the state of being watchful for possible danger: "security forces were placed on alert" Similar vigilancewatchfulnesscarefulnessattentivenessguardednesscarecautioncautiousnesswarinesscharinessalertnesshypervigilancecircumspectionprudenceheedfulnessheedmindfulnessOpposite carelessness
   • ▪ an announcement or signal warning of danger: "a bomb alert" Similar warningcautionnotificationnoticeexhortationinjunctionsirenalarmsignaldanger signaldistress signal
   • ▪ a period of vigilance in response to a warning of danger: "traffic was halted during the alert"
   • ▪ a signal on an electronic device that prompts the user to do something or attracts their attention: "a vibrating alert is a discreet alternative to ringtones"

   verb

   • 1. warn (someone) of a danger, threat, or problem, typically with the intention of having it avoided or dealt with: "he alerted people to the dangers of smoking"

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

   Derivatives

   • 1. alertly adverb

   Scrabble Points: 5

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2. dictionary.cambridge.org › us › dictionaryALERT | definition in the Cambridge English Dictionary

   dictionary.cambridge.org › us › dictionary

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   noun. us / əˈlɝːt / uk / əˈlɜːt / C1 [ C or U ] a warning to people to be prepared to deal with something dangerous: a bomb alert. The army was put on ( full) alert as the peace talks began to fail. The public were warned to be on the alert for (= watching carefully for) suspicious packages. [ C ]

3. dictionary.cambridge.org › us › dictionaryALERT | definition in the Cambridge Learner’s Dictionary

   dictionary.cambridge.org › us › dictionary

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   noun. uk / əˈlɜːt / us. [ C ] a warning about a possibly dangerous situation: a bomb alert. be on full/red alert. to be expecting problems and ready to deal with them: Police in the region were on full alert against further attacks. (Definition of alert from the Cambridge Learner's Dictionary © Cambridge University Press) Translations of alert.

4. www.vocabulary.com › dictionary › alertAlert - Definition, Meaning & Synonyms | Vocabulary.com

   www.vocabulary.com › dictionary › alert

   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.

5. www.collinsdictionary.com › dictionary › englishALERT definition and meaning | Collins English Dictionary

   www.collinsdictionary.com › dictionary › english

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   4 days ago · 1. watchful and ready, as in facing danger. 2. quick in thought or action; active; nimble. noun. 3. a warning signal as of an expected air raid; alarm. 4. the period during which such a warning is in effect.

6. www.oxfordlearnersdictionaries.com › definition › englishalert verb - Definition, pictures, pronunciation and usage ...

   www.oxfordlearnersdictionaries.com › definition › english

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   /əˈlɜːrt/ [often passive] Verb Forms. to warn somebody about a dangerous situation or one that requires immediate action. alert somebody Neighbours quickly alerted the emergency services. (be) alerted by something Alerted by a noise downstairs, he sat up and turned on the light. be alerted that…

7. www.ldoceonline.com › dictionary › alertalert | meaning of alert in Longman Dictionary of ...

   www.ldoceonline.com › dictionary › alert

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   alert meaning, definition, what is alert: giving all your attention to what is hap...: Learn more.

8. www.thefreedictionary.com › alertAlert - definition of alert by The Free Dictionary

   www.thefreedictionary.com › alert

   • Cached

   adj. 1. Vigilantly attentive; watchful: alert to danger; an alert bank guard. See Synonyms at careful. 2. Mentally responsive and perceptive; quick. 3. Brisk or lively in action: the bird's alert hopping from branch to branch. n. 1. A signal that warns of attack or danger: Sirens sounded the alert for an air raid. 2.