Alert meaning

ə-lûrt
Alert is defined as being awake and functioning at an energetic level.

An example of alert is the doctor who takes a quick nap before his next surgery so that he is well rested and ready to perform at a high level of awareness.

adjective
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Alert describes a person or thing extremely aware of what is going on with their surroundings, and is often ready to quickly respond to a possibly dangerous situation.

A mother who is at an airport with her children constantly keeping an eye on where they are and requesting they stay close is an example of someone who is being alert.

adjective
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Alert means a public method of warning people, either to give them vital information or to report danger.

An example of an alert are tornado sirens going off when a possible twister is headed in that direction.

noun
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The definition of alert is to take action and warn people to be aware of something that has happened in the past, is presently occurring, or will happen in the future.

When a person runs from door to door ringing bells and shouting about a fire, it is an example of alerting a neighborhood to danger.

verb
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Vigilantly attentive; watchful.

Alert to danger; an alert bank guard.

adjective
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A signal that warns of attack or danger.

Sirens sounded the alert for an air raid.

noun
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To notify of approaching danger or action; warn.

A flashing red light that alerted motorists to trouble ahead.

verb
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Watchful and ready, as in facing danger.
adjective
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An alarm.
noun
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Brisk or lively in action.

The bird's alert hopping from branch to branch.

adjective
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A warning signal as of an expected air raid; alarm.
noun
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(1) A sound or message that indicates some predefined event has occurred or a selected operation is about to be performed. The terms "alert" and "alarm" are sometimes used synonymously; however, an alert is more of a warning in advance, whereas an alarm signals that the event or error has occurred. See alarm.
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Attentive; awake; on guard.
adjective
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Mentally responsive and perceptive; quick.
adjective
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Quick in thought or action; active; nimble.
adjective
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The period during which such a warning is in effect.
noun
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A notice or reminder about some pressing matter or important information.

An alert to drivers about a detour.

noun
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To warn to be ready or watchful.

The troops were alerted.

verb
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To inform or make aware of.

We alerted them to their duties.

verb
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A notification of higher importance than an advisory.
noun
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To give warning to.
verb
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The definition of alert is a state of awareness as to what is going on with one’s surroundings, and often causes a person to be ready to quickly respond to a possibly dangerous situation.

When a woman is walking down a dark alley at night and keeps checking behind her, it is an example of alert.

noun
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A condition or period of heightened watchfulness or preparation for action.

Nuclear-armed bombers were put on alert during the crisis.

noun
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on the alert
  • Watchful and prepared for danger, emergency, or opportunity:
    Bird watchers on the alert for a rare species.
idiom
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on the alert
  • watchful; vigilant
idiom
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Idioms and Phrasal Verbs

Origin of alert

  • French alerte from Italian all' erta on the lookout alla to the, on the (from Latin ad illam to that) (ad to ad–) (illam) (feminine accusative sing. of ille that, the al-1 in Indo-European roots) erta lookout (from) (past participle of ergere to raise) (from Latin ērigere erect)

    From American Heritage Dictionary of the English Language, 5th Edition

  • From French alerte (“alert”), from the phrase à l'erte (“on the watch”), from Italian all'erta (“to the height”), from erta (“lookout, tower”).

    From Wiktionary