alert

1 of 3

adjective

ə-ˈlərt

: 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

Example Sentences

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. See More

Recent Examples on the Web

Adjective

The incident came as tensions were high at many federal facilities and the FBI was on alert following threats against the agency over its raid at former President Donald Trump's Florida home last week.

Harold Maass, The Week, 15 Aug. 2022 These entrepreneurs must remain very alert and make brilliant and quick business decisions.

Josh Wilson, Forbes, 16 June 2022 Tesla states that drivers using Autopilot must remain alert and be prepared to take full control of the vehicle at a moment’s notice.

Matt Mcfarland, CNN, 15 June 2022 Kansas Governor Laura Kelly urged residents to remain alert as severe weather moved across the state Friday night.

Dennis Romero, NBC News, 30 Apr. 2022 But despite the good news, experts are pleading with Americans to remain alert, as the highly infectious delta variant continues to circulate.

Arielle Mitropoulos, ABC News, 22 Oct. 2021 Caring adults who stay alert to digital dilemmas, set useful boundaries, and offer empathy, connection, and validation.

WIRED, 22 Aug. 2022 The traveling public should stay alert and follow instructions from signage and flaggers.

oregonlive, 8 Aug. 2022 During construction, the DOT said there may be overnight lane closures on Route 3 and motorists should slow down, keep a safe distance, stay alert, obey traffic signs, and use extreme caution in work zones.

Stephen Underwood, Hartford Courant, 15 July 2022

Noun

Wednesday will be the ninth consecutive day when a portion of the Golden State has been under a heat alert.

Kathryn Prociv, NBC News, 7 Sep. 2022 The Stage 3 alert ended at 8 p.m. without major rotating outages.

CBS News, 7 Sep. 2022 The city has already reported two deaths due to the rains and India’s Meteorological Department has issued a yellow alert for Bangalore, indicating further bad weather.

Saritha Rai, Fortune, 7 Sep. 2022 Later in the day, police sent another alert saying Myles Sanderson – one of two brothers believed to have killed 10 people and wounded 18 in a series of stabbings – was not in the community.

Nicole Fallert, USA TODAY, 7 Sep. 2022 The boil water alert covers about 1,500 homes and facilities across roughly 56 city blocks.

Emily Opilo, Baltimore Sun, 6 Sep. 2022 Nearly half of that was slated for bullet-resistant shields for school police and $17.1 million was for districts to purchase panic-alert technology.

Andrew Demillo, Chron, 6 Sep. 2022 Under the alert, people are encouraged to take transit, work remotely and limit driving, and to protect their health by avoiding outdoor activities during the hottest part of the day when air pollution levels are highest.

Jessica Flores, San Francisco Chronicle, 6 Sep. 2022 Around noon, an alert was sent out reporting that the suspect vehicle had been seen by a driver on Arcola Avenue in Regina and told the public in Regina to shelter in place.

Nouran Salahieh, CNN, 6 Sep. 2022

Verb

But a loss will alert Barstool to send you a free bet of equal value, up to $1,000.

Xl Media, cleveland, 8 Sep. 2022 But after the victims wire that money, their banks alert them that the check from the scammers was bogus.

Ron Hurtibise, Sun Sentinel, 8 Sep. 2022 This iPhone texting tip basically will alert you every time iOS attempts to autocorrect a word.

Yoni Heisler, BGR, 6 Sep. 2022 Most connected charging stations can also alert EV charging smartphone apps if a station is available.

Jordan Ramer, Forbes, 16 Aug. 2022 The funeral employee did not alert the family of Kyung Ja Kim until hours later, according to the suit.

Michelle Watson, CNN, 27 July 2022 Those workers will alert police to threats, point people to homeless-service agencies and keep an eye on vulnerable people.

Los Angeles Times, 5 July 2022 Any customer who feels worried or unsafe should absolutely alert the bartender and/or security staff.

Amy Dickinson, oregonlive, 12 June 2022 Any customer who feels worried or unsafe should absolutely alert the bartender and/or security staff.

Amy Dickinson, Detroit Free Press, 12 June 2022 See More

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

Kids Definition

alert 1 of 3

adjective

ə-ˈlərt

: watchful and ready especially to meet danger

But he was alert at night, too, on the road, always listening intently …

Lois Lowry, The Giver

: quick to understand and act

An alert reader noticed the error in grammar.

alert

2 of 3

noun

: an alarm or signal of danger

The police issued an alert.

: the period during which an alert is in effect

We stayed indoors during the alert.

alert

3 of 3

verb

alerted; alerting

: to make aware of a need to get ready or take action : warn

The siren alerted us that a tornado was approaching.

单词	on the alert
释义	alert 1 of 3 adjective ə-ˈlərt 1 a : watchful and prompt to meet danger or emergency an alert guard trying to stay alert to possible problems b : quick to perceive and act mentally alert 2 : active, brisk elicited an alert response alertly adverb alertness noun alert 2 of 3 noun 1 : a state of careful watching and readiness especially for danger or opportunity on 24-hour alert 2 a : an alarm or other signal of danger traffic alerts They sounded the alert. b : an urgent notice … an alert to parents … about new immunization requirements. Ann Schrader 3 : the period during which an alert is in effect alert 3 of 3 verb alerted; alerting; alerts transitive verb 1 : to call (someone) to a state of readiness : warn alerted the school board of a possible teachers' strike alert the authorities 2 : 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 Example Sentences 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. See More Recent Examples on the Web Adjective The incident came as tensions were high at many federal facilities and the FBI was on alert following threats against the agency over its raid at former President Donald Trump's Florida home last week. Harold Maass, The Week, 15 Aug. 2022 These entrepreneurs must remain very alert and make brilliant and quick business decisions. Josh Wilson, Forbes, 16 June 2022 Tesla states that drivers using Autopilot must remain alert and be prepared to take full control of the vehicle at a moment’s notice. Matt Mcfarland, CNN, 15 June 2022 Kansas Governor Laura Kelly urged residents to remain alert as severe weather moved across the state Friday night. Dennis Romero, NBC News, 30 Apr. 2022 But despite the good news, experts are pleading with Americans to remain alert, as the highly infectious delta variant continues to circulate. Arielle Mitropoulos, ABC News, 22 Oct. 2021 Caring adults who stay alert to digital dilemmas, set useful boundaries, and offer empathy, connection, and validation. WIRED, 22 Aug. 2022 The traveling public should stay alert and follow instructions from signage and flaggers. oregonlive, 8 Aug. 2022 During construction, the DOT said there may be overnight lane closures on Route 3 and motorists should slow down, keep a safe distance, stay alert, obey traffic signs, and use extreme caution in work zones. Stephen Underwood, Hartford Courant, 15 July 2022 Noun Wednesday will be the ninth consecutive day when a portion of the Golden State has been under a heat alert. Kathryn Prociv, NBC News, 7 Sep. 2022 The Stage 3 alert ended at 8 p.m. without major rotating outages. CBS News, 7 Sep. 2022 The city has already reported two deaths due to the rains and India’s Meteorological Department has issued a yellow alert for Bangalore, indicating further bad weather. Saritha Rai, Fortune, 7 Sep. 2022 Later in the day, police sent another alert saying Myles Sanderson – one of two brothers believed to have killed 10 people and wounded 18 in a series of stabbings – was not in the community. Nicole Fallert, USA TODAY, 7 Sep. 2022 The boil water alert covers about 1,500 homes and facilities across roughly 56 city blocks. Emily Opilo, Baltimore Sun, 6 Sep. 2022 Nearly half of that was slated for bullet-resistant shields for school police and $17.1 million was for districts to purchase panic-alert technology. Andrew Demillo, Chron, 6 Sep. 2022 Under the alert, people are encouraged to take transit, work remotely and limit driving, and to protect their health by avoiding outdoor activities during the hottest part of the day when air pollution levels are highest. Jessica Flores, San Francisco Chronicle, 6 Sep. 2022 Around noon, an alert was sent out reporting that the suspect vehicle had been seen by a driver on Arcola Avenue in Regina and told the public in Regina to shelter in place. Nouran Salahieh, CNN, 6 Sep. 2022 Verb But a loss will alert Barstool to send you a free bet of equal value, up to $1,000. Xl Media, cleveland, 8 Sep. 2022 But after the victims wire that money, their banks alert them that the check from the scammers was bogus. Ron Hurtibise, Sun Sentinel, 8 Sep. 2022 This iPhone texting tip basically will alert you every time iOS attempts to autocorrect a word. Yoni Heisler, BGR, 6 Sep. 2022 Most connected charging stations can also alert EV charging smartphone apps if a station is available. Jordan Ramer, Forbes, 16 Aug. 2022 The funeral employee did not alert the family of Kyung Ja Kim until hours later, according to the suit. Michelle Watson, CNN, 27 July 2022 Those workers will alert police to threats, point people to homeless-service agencies and keep an eye on vulnerable people. Los Angeles Times, 5 July 2022 Any customer who feels worried or unsafe should absolutely alert the bartender and/or security staff. Amy Dickinson, oregonlive, 12 June 2022 Any customer who feels worried or unsafe should absolutely alert the bartender and/or security staff. Amy Dickinson, Detroit Free Press, 12 June 2022 See More 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 Phrases Containing alert red alert spoiler alert hyper-alert on the alert red alert spoiler alert hyper-alert on the alert Kids Definition alert 1 of 3 adjective ə-ˈlərt 1 : watchful and ready especially to meet danger But he was alert at night, too, on the road, always listening intently … Lois Lowry, The Giver 2 : quick to understand and act An alert reader noticed the error in grammar. alert 2 of 3 noun 1 : an alarm or signal of danger The police issued an alert. 2 : the period during which an alert is in effect We stayed indoors during the alert. alert 3 of 3 verb alerted; alerting : to make aware of a need to get ready or take action : warn The siren alerted us that a tornado was approaching. on the alert phrase as in alert paying close attention usually for the purpose of anticipating approaching danger or opportunity Residents were warned to stay on the alert for changes in the storm's projected path. Synonyms & Similar Words Relevance alert awake vigilant watchful alive aware attentive on guard careful regardful cautious on the ball sensitive on tiptoe on the qui vive observant wary Argus-eyed keen conscious on one's toes tentie wide-awake open-eyed tenty prepared mindful sharp cognizant hyperalert sleepless heedful wakeful ready hypervigilant chary observing sharp-eyed Antonyms & Near Antonyms asleep preoccupied distracted absent dreaming absorbed oblivious engrossed dreamy unaware sleeping dazed abstracted unconscious daydreaming insensible faraway unwitting careless unprepared absentminded unmindful unwary unthinking unknowing heedless unheeding inattentive unready See More
随便看	bioclast bioclastic bioclasts bioclimatic bioclimatic law bioclimatician bioclimatograph bioclimatological bioclimatologies bioclimatologist biocoenology biocoenose biocoenoses biocoenosis biocompatibilities biocompatibility biocompatible biocomputer biocomputers biocomputing biocontainment biocontrol biocontrols bioconversion bioconversions

alert

adjective

noun

verb

Synonyms

Example Sentences

Word History

Phrases Containing alert

Kids Definition

adjective

noun

verb

phrase