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2024-03-13 06:39:08

Alert Definition & Meaning - Merriam-Webster

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Est. 1828

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Definition

adjective

noun

verb

adjective

noun

verb

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alert

1 of 3

adjective

ə-ˈlərt

Synonyms of alert

: watchful and prompt to meet danger or emergency

an alert guard trying to stay alert to possible problems

: quick to perceive and act

mentally alert

: active, brisk

elicited an alert response

alertly

adverb

alertness

noun

alert

2 of 3

noun

: a state of careful watching and readiness especially for danger or opportunity

on 24-hour alert

: an alarm or other signal of danger

traffic alerts They sounded the alert.

: an urgent notice

… an alert to parents … about new immunization requirements.—Ann Schrader

: the period during which an alert is in effect

alert

3 of 3

verb

alerted; alerting; alerts

transitive verb

: to call (someone) to a state of readiness : warn

alerted the school board of a possible teachers' strike alert the authorities

: to make (someone) aware of something

alerted the public to the dangers of pesticides

Phrases

on the alert

: looking for or expecting something (such as danger or an opportunity)

Drivers need to be on the alert for icy condition. always on the alert for a good bargain

Synonyms

Adjective

Argus-eyed

attentive

awake

observant

open-eyed

tenty [Scottish]

tentie

vigilant

watchful

wide-awake

Noun

admonishment

admonition

alarm

alarum

caution

forewarning

heads-up

notice

warning

Verb

advise

caution

forewarn

wake

warn

See all Synonyms & Antonyms in Thesaurus

Choose the Right Synonym for alert

watchful, vigilant, wide-awake, alert mean being on the lookout especially for danger or opportunity. watchful is the least explicit term.

the watchful eye of the department supervisor

vigilant suggests intense, unremitting, wary watchfulness.

eternally vigilant in the safeguarding of democracy

wide-awake applies to watchfulness for opportunities and developments more often than dangers.

wide-awake companies latched onto the new technology

alert stresses readiness or promptness in meeting danger or in seizing opportunity.

alert traders anticipated the stock market's slide

intelligent, clever, alert, quick-witted mean mentally keen or quick. intelligent stresses success in coping with new situations and solving problems.

an intelligent person could assemble it fast

clever implies native ability or aptness and sometimes suggests a lack of more substantial qualities.

clever with words

alert stresses quickness in perceiving and understanding.

alert to new technology

quick-witted implies promptness in finding answers in debate or in devising expedients in moments of danger or challenge.

no match for his quick-witted opponent

Examples of alert in a Sentence

Adjective

An alert guard stopped the robbers.

He was tired and had trouble staying alert while he was driving.

She wasn't mentally alert enough to answer the questions.

An alert watchdog guarded the door.

Noun

They sounded an alert when enemy planes were approaching the city.

Medical officials have put out an alert to hospitals to look out for the virus.

The government has issued a terrorism alert.

Verb

Several neighbors alerted the authorities when they noticed strangers acting suspiciously.

The governor alerted island residents that a hurricane was coming.

The teacher alerted the students that tests would be given the next day.

Recent Examples on the WebAdjective

With water temperatures climbing to unprecedented heights, NOAA earlier this month added three new levels to its alert system to account for increasingly severe coral bleaching and higher mortality rates.

—Helen Regan, CNN, 28 Feb. 2024

The steering is alert but also felt oddly disconnected from the wheels at certain times.

—Josh Max, Forbes, 24 Feb. 2024

The other driver, a 31-year-old man, was alert and refused medical attention, police said.

—Dillon Mullan, Baltimore Sun, 12 Feb. 2024

Freeze said Serna had not been left on the floor in a position that would be considered life-threatening, and that Serna was alert and talking.

—Teri Figueroa, San Diego Union-Tribune, 9 Feb. 2024

Despite the systems’ names — Autopilot, Enhanced Autopilot, and Full Self-Driving — none of them enable Tesla vehicles to drive themselves and require drivers to be alert and keep their hands on the steering wheel at all times.

—Jody Serrano / Gizmodo, Quartz, 6 Feb. 2024

Changes in level of consciousness: being unresponsive or hard to rouse, not being alert or interactive when awake.

—USA TODAY, 3 Feb. 2024

Lean and mean, eyes fixed, raffish with his unbuttoned collar and scruff, Sherman looks alive, alert, and every bit the eternal soldier.

—Brian T. Allen, National Review, 25 Jan. 2024

Third-party fact-checkers will be essential to provide unbiased, expert assessments of new narratives and alert platforms to rising threats.

—Jonathan Freger, Forbes, 12 Feb. 2024

Noun

An emergency alert from the D.C. government advised occupants to shelter in place, as residents looking out of their windows captured an armored vehicle rolling into their garage.

—Omari Daniels, Washington Post, 29 Feb. 2024

However, some legal risks have general counsels on high alert and, at times, create division between chief diversity officers and chief legal officers.

—Ruth Umoh, Fortune, 28 Feb. 2024

About 123 million people lived in regions with high wind alerts on Wednesday, with forecasts of at least 39 mph in Chicago; Buffalo, New York; Boston; and Atlanta.

—Kathryn Prociv, NBC News, 28 Feb. 2024

This would include features like dashboards, alerts, task management and exception reporting, all accessible in one place.

—Amit Jain, Forbes, 28 Feb. 2024

The alert is for a white 2007 GMC Yukon with the Texas license plate number: STM7097.

—Kendrick Calfee, Kansas City Star, 28 Feb. 2024

While there hasn’t been a widespread blackout, to many Texans these alerts are evidence of continuing grid frailty.

—Henry Gass, The Christian Science Monitor, 27 Feb. 2024

The children had last been seen in the 5900 block of South Interstate 45 in Wilmer, according to the alert.

—James Hartley, Fort Worth Star-Telegram, 26 Feb. 2024

Two homicides, four days apart, within one apartment complex on the north side of Indianapolis have put residents and police on high alert.

—Sarah Nelson, The Indianapolis Star, 26 Feb. 2024

Verb

Ahead of the opening, officials went to local restaurants, including Mama’s Pizza Kitchen and Busyboys and Poets, to alert them to an influx of lunchtime customers, and representatives from the D.C. police briefed workers on what to expect.

—Jenna Portnoy, Washington Post, 1 Mar. 2024

The girl’s mother soon alerted the other parents and arrived at Meyden’s house to pick up her daughter.

—Sean Neumann, Peoplemag, 1 Mar. 2024

Employees in the City Attorney's Office were alerted to Ohiku's resignation in an email Thursday afternoon.

—Daniel Bice, Journal Sentinel, 29 Feb. 2024

You are alerted that an AI hallucination is in your midst.

—Lance Eliot, Forbes, 29 Feb. 2024

Calls made from specific phones can alert a responder to the location of a caller, Verden explained.

—Audrey Conklin, Fox News, 29 Feb. 2024

Some people who are eligible for a claim may have received an email alerting them about the settlement.

—Kate Gibson, CBS News, 28 Feb. 2024

That individual alerted a fire station nearby and fire authorities - along with two neighbors – rushed to the home and rescued the mother and two children, who were still inside, White said.

—Shirin Faqiri, CNN, 24 Feb. 2024

The end goal is to build a larger system to alert tsunami and seismology agency personnel, but more work must be done to create this system.

—Laura Baisas, Popular Science, 22 Feb. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'alert.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Adjective

borrowed from French alerte, going back to Middle French a l'herte "on guard, on the watch," borrowed from Italian all'erta, originally in the collocation stare all'erta "to be on the watch," literally, "to be on the height" (with erta "height, hill, steep ascent," noun derivative from feminine of erto, past participle of ergere "to raise, elevate," going back to Vulgar Latin *ērgere, by syncope from Latin ērigere) — more at erect entry 1

Note:

The earliest citation for the word in the Oxford English Dictionary suggests direct borrowing from Italian, or at least recognition of an Italian source: "In this place the Prince [of Orange] finding his rutters [cavalry soldiers] alert, (as the Italians say) with aduise of his valiant brother, hee sent his Trumpets to D. d' Alua …." (Sir Roger Williams, The Actions of the Lowe Countries, London, 1618, p. 27).

Noun

noun derivative of alert entry 1 (or borrowed from French alerte, derivative of alerte, adjective)

Verb

verbal derivative of alert entry 1 or alert entry 2

First Known Use

Adjective

1618, in the meaning defined at sense 1a Noun

1801, in the meaning defined at sense 1 Verb

circa 1868, in the meaning defined at sense 1

Time Traveler

The first known use of alert was

in 1618

See more words from the same year

Phrases Containing alert

spoiler alert

red alert

hyper-alert

on the alert

Dictionary Entries Near alert

alerion

alert

-ales

See More Nearby Entries

Cite this Entry

Style

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Merriam-Webster

“Alert.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/alert. Accessed 12 Mar. 2024.

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Kids Definition

alert

1 of 3

adjective

ə-ˈlərt

: being watchful and ready to meet danger

: quick to understand and act

: active sense 3, brisk

alertly

adverb

alertness

noun

alert

2 of 3

noun

: a signal of danger

: the period during which an alert is in effect

alert

3 of 3

verb

: to call to a state of readiness : warn

ALERT | English meaning - Cambridge Dictionary

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English (UK)

English

Meaning of alert in English

alertadjective uk

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/əˈlɜːt/ us

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/əˈlɝːt/

Add to word list

C1 quick to see, understand, and act in a particular situation: I'm not feeling very alert today - not enough sleep last night! A couple of alert readers posted comments on the website pointing out the mistake. Parents should be alert to sudden changes in children's behaviour.

More examplesFewer examplesDoing puzzles and crosswords regularly keeps your mind alert and active.Although Granny was frail in her old age, but was mentally very alert.He was normally a bright, alert baby, so she felt sure there was something seriously wrong.A small animal must always remain alert for predators.There have been some thefts recently, so please stay alert and don't leave handbags and valuables around.

SMART Vocabulary: related words and phrases

Perceptive

acute

acuteness

antenna

eagle-eyed

gimlet

have an eye for something idiom

have gimlet eyes idiom

have/keep (all) your wits about you idiom

hawk-eyed

hawkish

observant

perceptive

perceptively

percipiently

razor-sharp

sensate

sensately

sharp

sharpness

wit

See more results »

You can also find related words, phrases, and synonyms in the topics:

Reacting and responding

Related word

alertness

alertnoun uk

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/əˈlɜːt/ us

Your browser doesn't support HTML5 audio

/əˈlɝːt/

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 ] a message, for example on your mobile phone or on television or radio, that warns you or gives you information about something: You can set location-based alerts so your phone will remind you of something important when you are arriving at or leaving a location. I get text alerts when I have used 80% of my mobile data. Sign up to receive news alerts in your area.

SMART Vocabulary: related words and phrases

Threats & warnings

advance warning

alarm

alarm bell

bell-ringing

beware the ides of March idiom

bomb scare

bow

brushback pitch

burglar alarm

cautionary

dare

early warning system

hear warning bells idiom

one swallow doesn't make a summer idiom

protection racket

red alert

red flag

scare quotes

screamer

yellow card

See more results »

You can also find related words, phrases, and synonyms in the topics:

Emergency services in general

Communications - general words

alertverb [ T ] uk

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/əˈlɜːt/ us

Your browser doesn't support HTML5 audio

/əˈlɝːt/

C2 to warn someone of a possibly dangerous situation: An anonymous letter alerted police to the possibility of a terrorist attack at the airport.

More examplesFewer examplesIf you hear a flood warning, please alert your neighbours and make emergency preparations.Until I saw my statement, there was nothing to alert me that someone else was using my credit card number.We encourage parents to alert the school about any concerns or difficulties at home.We don't want to alarm people unnecessarily, but they should be alerted to potential dangers.A note of formality in his voice alerted her to the fact that others were listening.

SMART Vocabulary: related words and phrases

Threats & warnings

advance warning

alarm

alarm bell

bell-ringing

beware the ides of March idiom

bomb scare

bow

brushback pitch

burglar alarm

cautionary

dare

early warning system

hear warning bells idiom

one swallow doesn't make a summer idiom

protection racket

red alert

red flag

scare quotes

screamer

yellow card

See more results »

(Definition of alert from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

alert | American Dictionary

alertadjective us

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/əˈlɜrt/

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quick to see, understand, and act in a particular situation: When you’re driving, you must stay alert. We had to be alert to any danger signs in the economy.

alertnoun [ C/U ] us

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/əˈlɜrt/

a warning to people to get ready to deal with something dangerous: [ U ] The police were on the alert for (= watching carefully for) any sign of trouble.

alert verb [ T ] us

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/əˈlɜrt/

The auto company mailed letters to owners of that model car, alerting them of safety risks.

(Definition of alert from the Cambridge Academic Content Dictionary © Cambridge University Press)

Examples of alert

alert

Difficult relations with coal operators alerted labour to the danger of divide-and-rule tactics.

From the Cambridge English Corpus

He also alerts us to the dangers of affluent baby boomers using their political clout to get policy precedence.

From the Cambridge English Corpus

Thus, it constantly alerted the government to the need of keeping a tight rein on criminal and subversive elements.

From the Cambridge English Corpus

The instant we hear 'lest' our minds are alerted to concentrate on the significance of the following clause.

From the Cambridge English Corpus

Information from the dorsal stream alerts the organism to the fact that something of potential interest or importance is out there.

From the Cambridge English Corpus

Her study also alerts us to the fact that collaboration has social and personal consequences for participants.

From the Cambridge English Corpus

In addition, the service provides all users with free access to tables of contents and abstracts, and a free email alerting service.

From the Cambridge English Corpus

What is called for is a reporting system that monitors all expenditures and alerts the government to potential overruns.

From the Cambridge English Corpus

An additional 21 new participants were recruited to the study in 1991 by alerting area clinics that participants were being sought for the study.

From the Cambridge English Corpus

His retreating to her when he has been startled, alerted, slightly hurt, mildly frightened or fatigued seldom elicits her attention.

From the Cambridge English Corpus

Punctuation delineates rhetorical structure, so that a reader can be explicitly alerted to certain formal contrivances relevant to the communicative significances embodied in a text.

From the Cambridge English Corpus

The number of parent falsely alerted for every true case found is minimal.

From the Cambridge English Corpus

Another incident occurred in 1986 that alerted me to the growth of a new and alternative world view and ethos.

From the Cambridge English Corpus

The table also alerts readers to passages where the variants are minor enough to be reportable in the critical notes.

From the Cambridge English Corpus

A friend alerted me to the need for funds.

From the Cambridge English Corpus

See all examples of alert

These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.

What is the pronunciation of alert?

C1,C1,C2

Translations of alert

in Chinese (Traditional)

機警的，機敏的，敏捷的, 警報, 使警覺，使警惕…

in Chinese (Simplified)

机警的，机敏的，敏捷的, 警报, 使警觉，使警惕…

in Spanish

despierto, vivo, alerta…

in Portuguese

atento, alerta, alertar…

in more languages

in Marathi

in Japanese

in Turkish

in French

in Catalan

in Dutch

in Tamil

in Hindi

in Gujarati

in Danish

in Swedish

in Malay

in German

in Norwegian

in Urdu

in Ukrainian

in Russian

in Telugu

in Arabic

in Bengali

in Czech

in Indonesian

in Thai

in Vietnamese

in Polish

in Korean

in Italian

जागृत, सजग, जागे…

油断のない, 警戒した, 抜け目ない…

teyakkuz hali, uyanık olma hali, dikkatli…

vigilant/-ante, alerte, alerte [feminine]…

despert, atent, alertar…

kwiek, waakzaam, alarmsignaal…

ஒரு குறிப்பிட்ட சூழ்நிலையில் விரைவாகப் பார்ப்பது, புரிந்துகொள்வது மற்றும் செயல்படுவது, ஆபத்தான ஒன்றைச் சமாளிக்க தயாராக இருக்குமாறு மக்களுக்கு விடப்படும் ஒரு எச்சரிக்கை…

सतर्क, सजग, चौकन्ना…

જાગૃત, સાવધ, ચેતવણી…

vågen, skarp, på vagt…

pigg, alert, vaksam…

tangkas, berhati hati, perhatian…

lebhaft, aufmerksam, die Alarmbereitschaft…

våken, oppmerksom, på vakt…

ہوشیار, چوکس, چوکنا…

спритний, жвавий, насторожений…

бдительный, предупреждать, тревога…

అప్రమత్తంగా, చురుకుగా, హెచ్చరిక…

يَقِظ, يُنَبِّه, تَنبيه…

তৎপর, চনমনে বোধ, সতর্ক…

bystrý, čilý, ostražitý…

waspada, siaga, aba-aba…

ตื่นตัว, สัญญาณเตือนให้พร้อม, เตือน…

minh mẫn, cảnh giác, sự báo động…

czujny, zaalarmować, powiadomić…

기민한, 알리다, 경고…

attento, vigile, sveglio…

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aleatory

aleatory contract

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alert

alerted

alerting

alertness

Alexandria

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All

red alert

Amber Alert

Silver Alert

Amber alert, at Amber Alert

AMBER alert, at Amber Alert

hyper-alert, at hyperalert

silver alert, at Silver Alert

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Word of the Day

response

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/rɪˈspɒns/

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/rɪˈspɑːns/

an answer or reaction

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alert

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alert

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ALERT Definition & Usage Examples | Dictionary.com

GamesDaily CrosswordWord PuzzleWord FinderAll gamesFeaturedWord of the DaySynonym of the DayWord of the YearNew wordsLanguage storiesAll featuredPop cultureSlangEmojiMemesAcronymsGender and sexualityAll pop cultureWriting tipsGrammar Coach™Writing hubGrammar essentialsCommonly confusedAll writing tipsGamesFeaturedPop cultureWriting tipsalert[ uh-lurt ]show ipaSee synonyms for: alertalertedalertsalertly on Thesaurus.comadjectivefully aware and attentive; wide-awake; keen: She had an alert mind.swift; agile; nimble.nounan attitude of vigilance, readiness, or caution, as before an expected attack.a warning or alarm of an impending military attack, a storm, etc.: We'd just boarded the bus when the alert sounded.the period during which such a warning or alarm is in effect.See moreverb (used with object)to warn (troops, ships, etc.) to prepare for action.to warn of an impending raid, attack, storm, etc.: The radio alerted coastal residents to prepare for the hurricane.to advise or warn; cause to be on guard: to alert gardeners to the dangers of some pesticides.See moreIdioms about alerton the alert, on guard against danger; in readiness; vigilant: The state police are on the alert for an escaped convict believed to be in the area.Origin of alert1First recorded in 1590–1600; 1940–45 for def. 4; from Italian all'erta, equivalent to all (a ) “to, on the” + erta “lookout, watchtower,” originally feminine of erto, past participle of ergere from Latin ērigere to erectsynonym study For alert1. Alert, vigilant, watchful imply a wide-awake attitude, as of someone keenly aware of their surroundings. Alert describes a ready and prompt attentiveness together with a quick intelligence: The tourist was alert and eager to see the sights. Vigilant suggests some immediate necessity for keen, active observation, and for continuing alertness: Knowing the danger, the scout was unceasingly vigilant. Watchful suggests carefulness and preparedness: A stakeout requires watchful waiting.Other words for alert1 awake, wary, observant 2 brisk, lively, quick, active, sprightly, spiritedSee synonyms for alert on Thesaurus.comOpposites for alert1 unawareSee antonyms for alert on Thesaurus.comOther words from alerta·lert·ly, adverba·lert·ness, nounhy·per·a·lert, adjectiveun·a·lert·ed, adjectiveWords Nearby alertAleppoAleppo gallAleppo pinealercealerionalert-alesAlesiaAlessandraAlessandriAlessandriaDictionary.com Unabridged

Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024How to use alert in a sentenceThe US Federal Bureau of Investigation became involved early on when the Tesla employee alerted it to Kriuchkov’s plan.How a $1 million plot to hack Tesla failed | Patrick O'Neill | August 28, 2020 | MIT Technology ReviewThere's also an app—of course there's an app—that will alert you when the mask filters need to be replaced.LG’s battery-powered face mask will “make breathing effortless” | Ron Amadeo | August 27, 2020 | Ars TechnicaThe new $100 Inspire 2 activity tracker is different from the Halo, however, with a small screen that provides phone notifications and app alerts.Amazon jumps into smart wearables market with Halo activity tracking band | Aaron Pressman | August 27, 2020 | FortuneMobile phone and broadcast alerts advised people to prepare to evacuate.Improved three-week weather forecasts could save lives from disaster | Alexandra Witze | August 27, 2020 | Science NewsDistrict Attorney Michael Ramsey of Butte County, where Paradise is located, confirmed in March that PG&E alerted his office to the allegations and said he was awaiting further information.The Mystery House: How a Suspicious Multimillion Dollar Real Estate Deal Is Connected to California’s Deadliest Fire | by Scott Morris, Bay City News Foundation | August 26, 2020 | ProPublicaMinutes before an airplane hit the water, an alert would go out.Red Tape and Black Boxes: Why We Keep ‘Losing’ Airliners in 2014 | Clive Irving | December 29, 2014 | THE DAILY BEASTFrance is on high alert this week after a series of attacks by loners.A Gift to the Jihadis: The Unseen Airport Security Threat | Clive Irving | December 27, 2014 | THE DAILY BEASTI also want to alert you to the broader circumstances of my incarceration.An American Marine in Iran’s Prisons Goes on Hunger Strike | IranWire | December 18, 2014 | THE DAILY BEASTSpoiler alert: Do not read if you haven't seen season five episode eight of The Walking Dead, “Coda”Norman Reedus on Motorcycles, Multitasking, And That Mid-Season Finale: “This Was A Rough One” | Oliver Jones | December 2, 2014 | THE DAILY BEASTThey walk closely together, tense, and alert in their movements.‘Girlhood’: Coming of Age in France’s Projects | Molly Hannon | November 25, 2014 | THE DAILY BEASTIt was Carmena, every nerve of her loyal nature on the alert to baffle this pursuer of Alessandro and Ramona.Ramona | Helen Hunt JacksonThen, his hand resting on the handle of the cab-door, this expression suddenly changed to one of alert suspicion.Dope | Sax RohmerHe is small, alert, brimful of jokes and of years; seventy they say, but he neither looks it nor acts it.Gallipoli Diary, Volume I | Ian HamiltonBut his eyes and ears were alert, and he was the first to hear the advent of a large body of horses along the main road.The Red Year | Louis TracyThe almost lazy naturalness and simplicity faded gradually out of it, revealing the alert and seductive woman of the world.Bella Donna | Robert HichensSee More ExamplesBritish Dictionary definitions for alertalert/ (əˈlɜːt) /adjective(usually postpositive)vigilantly attentive: alert to the problemsbrisk, nimble, or livelynounan alarm or warning, esp a siren warning of an air raidthe period during which such a warning remains in effecton the alert on guard against danger, attack, etcwatchful; ready: on the alert for any errorsSee moreverb(tr)to warn or signal (troops, police, etc) to prepare for actionto warn of danger, an attack, etcOrigin of alert1C17: from Italian all'erta on the watch, from erta lookout post, from ergere to build up, from Latin ērigere; see erectDerived forms of alertalertly, adverbalertness, nounCollins English Dictionary - Complete & Unabridged 2012 Digital Edition

Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012Other Idioms and Phrases with alertalertsee on the alert.The American Heritage® Idioms Dictionary

Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.Browse#aabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzzAboutCareersShopContact usAdvertise with usCookies, terms, & privacyDo not sell my infoFollow usGet the Word of the Day every day!Sign upBy clicking "Sign Up", you are accepting Dictionary.com Terms & Conditions and Privacy Policies.My account© 2024 Dictionary.com, LLC

ALERT Synonyms: 416 Similar and Opposite Words | Merriam-Webster Thesaurus

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Est. 1828

Thesaurus

Synonyms of alert

noun

as in warning

as in watchfulness

verb

as in to warn

adjective

as in awake

as in cautious

as in intelligent

as in quick

as in warningas in watchfulnessas in to warnas in awakeas in cautiousas in intelligentas in quick

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alert

1 of 3

noun

Definition of alert

as in warning

the act or an instance of telling beforehand of danger or risk

the white flash of the doe's raised tail, giving the "danger" alert to her fawns

Synonyms & Similar Words

Relevance

warning

alarm

forewarning

caution

heads-up

advice

admonition

suggestion

recommendation

informing

notice

admonishment

alarum

prediction

notification

predicting

forecasting

announcement

prophecy

prophesy

guidance

premonition

tip

declaration

notifying

tip-off

apprising

presaging

foretelling

augury

prophesying

prognosticating

counsel

auguring

as in watchfulness

the state of being constantly attentive and responsive to signs of opportunity, activity, or danger

the doctor told the patient to be on the alert for any signs of infection

Synonyms & Similar Words

watchfulness

watch

alertness

vigilance

attentiveness

red alert

awareness

mindfulness

sensitivity

consciousness

qui vive

receptivity

receptiveness

aliveness

readiness

cautiousness

wariness

preparation

carefulness

care

chariness

heedfulness

Antonyms & Near Antonyms

daze

distraction

abstraction

absorption

daydreaming

preoccupation

absentmindedness

obliviousness

engrossment

unawareness

unconsciousness

inattention

carelessness

inattentiveness

heedlessness

inobservance

unwariness

alert

2 of 3

verb

as in to warn

to give notice to beforehand especially of danger or risk

alerted us to the possibility that the roads would be flooded and we might have to take a detour

Synonyms & Similar Words

warn

advise

inform

wake

caution

forewarn

notify

predict

forecast

apprise

admonish

presage

prophesy

foretell

prognosticate

tip (off)

augur

harbinger

foreshadow

bode

portend

forebode

forbode

foretoken

Antonyms & Near Antonyms

risk

imperil

alert

3 of 3

adjective

as in awake

paying close attention usually for the purpose of anticipating approaching danger or opportunity

she needed to stay alert throughout the train ride so as not to miss her stop

Synonyms & Similar Words

awake

vigilant

watchful

aware

attentive

cautious

careful

observant

alive

wide-awake

wary

on the alert

regardful

sensitive

conscious

prepared

open-eyed

keen

on the ball

on the qui vive

tentie

mindful

cognizant

Argus-eyed

on guard

on tiptoe

tenty

wakeful

heedful

hypervigilant

observing

ready

on one's toes

sleepless

hyperalert

sharp-eyed

chary

sharp

Antonyms & Near Antonyms

absent

oblivious

distracted

unaware

asleep

preoccupied

unconscious

dreaming

sleeping

dazed

absorbed

dreamy

engrossed

abstracted

unwitting

insensible

careless

unknowing

inattentive

unmindful

heedless

absentminded

unwary

unprepared

unthinking

daydreaming

faraway

unready

unheeding

as in cautious

having or showing a close attentiveness to avoiding danger or trouble

warned us to be alert to the presence of pickpockets on the crowded bus

Synonyms & Similar Words

cautious

wary

careful

considerate

guarded

circumspect

heedful

safe

vigilant

conservative

chary

watchful

attentive

awake

thoughtful

gingerly

observant

regardful

foresighted

deliberate

slow

provident

advertent

cagey

shrewd

calculating

hypercautious

forethoughtful

canny

cagy

foresightful

ultracautious

ultracareful

Antonyms & Near Antonyms

careless

unsafe

unmindful

heedless

reckless

rash

bold

unwary

regardless

unguarded

impetuous

inattentive

asleep

venturesome

negligent

brash

thoughtless

incautious

lax

inconsiderate

remiss

neglectful

forgetful

indiscreet

imprudent

inadvertent

injudicious

unintentional

unplanned

absentminded

as in intelligent

having or showing quickness of mind

an alert and well-trained sheep dog who can handle difficult situations

Synonyms & Similar Words

intelligent

quick

smart

clever

fast

keen

sharp

brilliant

bright

exceptional

wise

educated

skilled

nimble

informed

quick-witted

brainy

sharp-witted

literate

acute

cunning

supersmart

resourceful

learned

hyperintelligent

astute

ultrasmart

sensible

perceptive

apt

trained

knowing

savvy

discerning

schooled

knowledgeable

insightful

prudent

creative

cerebral

sound

sagacious

ingenious

logical

reasonable

erudite

perspicacious

judicious

sane

scholarly

rational

heady

inventive

percipient

genial

sapient

wily

well-read

shrewd

sage

crafty

highbrow

foxy

Antonyms & Near Antonyms

dumb

stupid

slow

dense

dim

simple

soft

brain-dead

dopey

dull

mindless

opaque

obtuse

unintelligent

fatuous

senseless

thick

vacuous

witless

brainless

doltish

pinheaded

lamebrain

boneheaded

softheaded

weak-minded

foolish

dunderheaded

thickheaded

feebleminded

lamebrained

dopy

silly

dorky

simpleminded

ignorant

idiotic

uninformed

imbecile

dim-witted

moronic

gormless

uneducated

empty-headed

slow-witted

bubbleheaded

knuckleheaded

airheaded

unbrilliant

chuckleheaded

unthinking

imbecilic

unsmart

half-witted

illiterate

mad

lunkheaded

thick-witted

untaught

birdbrained

crazy

insane

unwise

fool

absurd

nutty

cuckoo

lowbrow

zany

idiotical

preposterous

lunatic

wacky

loony

whacky

nonintellectual

unintellectual

boobish

sappy

dippy

nonsensical

daft

unacademic

balmy

asinine

harebrained

kooky

daffy

screwball

half-baked

cockeyed

dotty

looney

crackpot

featherheaded

kookie

tomfool

as in quick

having or showing the ability to respond without delay or hesitation

an alert force of commandos, ready to go on a mission at a moment's notice

Synonyms & Similar Words

quick

immediate

ready

prompt

responsive

willing

swift

expeditious

rapid

keen

brisk

clever

receptive

alacritous

summary

eager

smart

fast

instantaneous

instant

sharp

rattling

lightning

breathless

speedy

fleet

apt

whirlwind

snappy

rapid-fire

fleet-footed

quick-witted

hit-and-run

breakneck

sharp-witted

ready-witted

Antonyms & Near Antonyms

unresponsive

creeping

slow

lazy

crawling

lagging

sluggish

dragging

tardy

unhurried

laggard

slothful

dilatory

inactive

poking

leisurely

pokey

idle

dormant

inert

logy

loggy

poky

dallying

lazyish

dawdling

dillydallying

slowish

Synonym Chooser

How does the adjective alert contrast with its synonyms?

Some common synonyms of alert are vigilant, watchful, and wide-awake. While all these words mean "being on the lookout especially for danger or opportunity," alert stresses readiness or promptness in meeting danger or in seizing opportunity.

alert traders anticipated the stock market's slide

When can vigilant be used instead of alert?

The synonyms vigilant and alert are sometimes interchangeable, but vigilant suggests intense, unremitting, wary watchfulness.

eternally vigilant in the safeguarding of democracy

When might watchful be a better fit than alert?

In some situations, the words watchful and alert are roughly equivalent. However, watchful is the least explicit term.

the watchful eye of the department supervisor

When could wide-awake be used to replace alert?

The words wide-awake and alert can be used in similar contexts, but wide-awake applies to watchfulness for opportunities and developments more often than dangers.

wide-awake companies latched onto the new technology

Phrases Containing alert

on the alert

red alert

Thesaurus Entries Near alert

alehouses

alert

alerted

See More Nearby Entries

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“Alert.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/alert. Accessed 12 Mar. 2024.

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ALERT | definition in the Cambridge Learner’s Dictionary

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Learner’s Dictionary

Definition of alert – Learner’s Dictionary

alertadjective uk

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/əˈlɜːt/ us

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quick to notice and react to things around you: A young dog should be alert and playful. Teachers need to be alert to sudden changes in students' behaviour.

alertness noun [ U ]

alertverb [ T ] uk

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/əˈlɜːt/ us

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to warn someone of a possibly dangerous situation: Six hours later she still wasn't home so they alerted the police.

alertnoun uk

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/əˈlɜːt/ us

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[ 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.

Translations of alert

in Chinese (Traditional)

機警的，機敏的，敏捷的, 警報, 使警覺，使警惕…

in Chinese (Simplified)

机警的，机敏的，敏捷的, 警报, 使警觉，使警惕…

in Spanish

despierto, vivo, alerta…

in Portuguese

atento, alerta, alertar…

in more languages

in Marathi

in Japanese

in Turkish

in French

in Catalan

in Dutch

in Tamil

in Hindi

in Gujarati

in Danish

in Swedish

in Malay

in German

in Norwegian

in Urdu

in Ukrainian

in Russian

in Telugu

in Arabic

in Bengali

in Czech

in Indonesian

in Thai

in Vietnamese

in Polish

in Korean

in Italian

जागृत, सजग, जागे…

油断のない, 警戒した, 抜け目ない…

teyakkuz hali, uyanık olma hali, dikkatli…

vigilant/-ante, alerte, alerte [feminine]…

despert, atent, alertar…

kwiek, waakzaam, alarmsignaal…

सतर्क, सजग, चौकन्ना…

જાગૃત, સાવધ, ચેતવણી…

vågen, skarp, på vagt…

pigg, alert, vaksam…

tangkas, berhati hati, perhatian…

lebhaft, aufmerksam, die Alarmbereitschaft…

våken, oppmerksom, på vakt…

ہوشیار, چوکس, چوکنا…

спритний, жвавий, насторожений…

бдительный, предупреждать, тревога…

అప్రమత్తంగా, చురుకుగా, హెచ్చరిక…

يَقِظ, يُنَبِّه, تَنبيه…

তৎপর, চনমনে বোধ, সতর্ক…

bystrý, čilý, ostražitý…

waspada, siaga, aba-aba…

ตื่นตัว, สัญญาณเตือนให้พร้อม, เตือน…

minh mẫn, cảnh giác, sự báo động…

czujny, zaalarmować, powiadomić…

기민한, 알리다, 경고…

attento, vigile, sveglio…

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Contents

Learner’s Dictionary

Adjective

alert

Noun

alertness

Verb

Noun

alert

be on full/red alert

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alert verb - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com

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Definition of alert verb from the Oxford Advanced Learner's Dictionary

alert verb /əˈlɜːt/ /əˈlɜːrt/[often passive]Verb Forms present simple I / you / we / they alert /əˈlɜːt/ /əˈlɜːrt/ he / she / it alerts /əˈlɜːts/ /əˈlɜːrts/ past simple alerted /əˈlɜːtɪd/ /əˈlɜːrtɪd/ past participle alerted /əˈlɜːtɪd/ /əˈlɜːrtɪd/ -ing form alerting /əˈlɜːtɪŋ/ /əˈlɜːrtɪŋ/

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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… The coastguard were alerted that a yacht had run into difficulties.Topics Dangerc1, War and conflictc1

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to make somebody aware of something be alerted to something They had been alerted to the possibility of further price rises. See alert in the Oxford Advanced American DictionarySee alert in the Oxford Learner's Dictionary of Academic EnglishCheck pronunciation:

alert

Other results

All matches

alert noun

alert adjective

red alert noun

bomb alert noun

push alert noun

spoiler alert noun

bomb alert

push alert

Nearby words

aleck noun

alehouse noun

alert verb

alert noun

alert adjective

boost

verb

From the Topic

Change, cause and effect

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July 10, 2022

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