alert

/ə'lə:t/
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alert

A security guard remains alert during his night shift.

Definition

  1. Adjective:

    • Mentally perceptive and responsive: Being quick to notice and respond to things around you; showing awareness and readiness.
    • Quick and energetic: Characterized by briskness, liveliness, or a fast pace.
    • Engaged in close observation: Being watchful, vigilant, and attentive to details or potential dangers.

  2. Noun:

    • A warning signal: An automatic signal, often a sound, that warns of danger or a problem.
    • A state of readiness: A condition of heightened watchfulness or preparation for immediate action.

  3. Verb:

    • To warn: To make someone aware of a danger or problem, causing them to be ready for action.
Usage Examples

  • Adjective:

    • She has an alert mind and solves problems quickly.
    • The hikers were alert to the sounds of animals in the forest.
    • The security guard remained alert throughout the night.

  • Noun:

    • A loud alert sounded throughout the building.
    • The military was put on high alert after the threat was received.

  • Verb:

    • The app will alert you when your package is delivered.
    • The news report alerted residents to the approaching storm.
Advanced Usage

  • "to be on the alert": To be in a state of watchfulness and readiness for danger or opportunity.

    • Travelers should be on the alert for pickpockets in crowded areas.

  • "to sound the alert": To give a warning signal.

    • The sensors sounded the alert when smoke was detected.
Variants and Related Words

  • Alertly (adverb): In a watchful and quick manner.

    • The dog watched alertly from the window.

  • Alertness (noun): The quality of being alert; vigilance.

    • The job requires constant alertness and attention to detail.
Synonyms
  • Adjective: Watchful, vigilant, attentive, perceptive, lively, brisk.
  • Noun: Warning, alarm, signal, siren.
  • Verb: Warn, notify, alarm, inform.
Related Phrasal Verbs
  • Alert someone to something: To make someone aware of a specific fact or danger.
    • The guide alerted the group to the steep drop ahead.
Related Idioms

  • On red alert: In a state of the highest readiness for an emergency.

    • The hospital was on red alert following the earthquake.

  • On full alert: Completely ready and watchful.

    • The soldiers were on full alert at the border.
alert

A security guard remains alert during his night shift.

Adjective
  1. mentally perceptive and responsive
    • an alert mind
    • alert to the problems
    • alive to what is going on
    • awake to the dangers of her situation
    • was now awake to the reality of his predicament
  2. quick and energetic
    • a brisk walk in the park
    • a lively gait
    • a merry chase
    • traveling at a rattling rate
    • a snappy pace
    • a spanking breeze
  3. 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
Noun
  1. an automatic signal (usually a sound) warning of danger
  2. a warning serves to make you more alert to danger
  3. condition of heightened watchfulness or preparation for action
    • bombers were put on alert during the crisis
Verb
  1. warn or arouse to a sense of danger or call to a state of preparedness
    • The empty house alarmed him
    • We alerted the new neighbors to the high rate of burglaries

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