as in watch
the state of being constantly attentive and responsive to signs of opportunity, activity, or danger
the paparazzi were on red alert for sightings of the hot new Hollywood couple
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Recent Examples of red alert
Guangzhou, a city of 18.6 million people, was expected to issue its highest red alert Tuesday, while in Shenzhen, home to about 17.5 million residents, work and businesses were shut down and officials were preparing to relocate 400,000 people from low-lying and coastal areas.
—
Helen Regan, CNN Money, 23 Sep. 2025
For the Fortune 500, the IT worker scheme has been a flashing red alert about the evolution of employment-fraud schemes.
—Amanda Gerut, Fortune, 4 Aug. 2025
In one of the latest instances of extreme weather, at least 30 people died this week on the outskirts of Beijing after the city issued the highest-level red alert for heavy rain, according to state media.
—Evelyn Cheng, CNBC, 31 July 2025
Over the weekend, Kerr County issued a code red alert because of an excessive rainfall forecast.
—Marlene Lenthang, NBC news, 14 July 2025
See All Example Sentences for red alert
Helen Regan, CNN Money, 23 Sep. 2025
For the Fortune 500, the IT worker scheme has been a flashing red alert about the evolution of employment-fraud schemes.
—Amanda Gerut, Fortune, 4 Aug. 2025
In one of the latest instances of extreme weather, at least 30 people died this week on the outskirts of Beijing after the city issued the highest-level red alert for heavy rain, according to state media.
—Evelyn Cheng, CNBC, 31 July 2025
Over the weekend, Kerr County issued a code red alert because of an excessive rainfall forecast.
—Marlene Lenthang, NBC news, 14 July 2025
See All Example Sentences for red alert
Recent Examples of Synonyms for red alert
Noun
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In this episode, Marshall sets back his watch anyway.—
Jenny Porter Tilley,
IndyStar,
27 Oct. 2025
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The handsy thief also helped himself to the watch on my wrist.—
Katie Jackson,
Travel + Leisure,
26 Oct. 2025
Noun
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This patience is watchfulness, not idleness.—
Francois Botha,
Forbes.com,
7 Sep. 2025
Noun
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Air raid alerts were in place in Kyiv and surrounding districts for around an hour and a half before the air force called them off shortly after midnight on Sunday.—
Laura Sharman,
CNN Money,
26 Oct. 2025
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The online system allows text or email alerts to be set up whenever a new message arrives.—
Ingrid Vasquez,
PEOPLE,
25 Oct. 2025
Noun
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To measure my alertness, she’s decided to give me an hourly Psychomotor Vigilance Test, along with some word-fluency exercises and EEG brain scans.—
Rowan Jacobsen,
Harpers Magazine,
24 Oct. 2025
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Protein supports muscle growth, energy, and satiety, while coffee boosts alertness and may offer benefits for the heart, liver, and brain.—
Heather Jones,
Verywell Health,
20 Oct. 2025
Noun
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That vigilance can build trust and help independent operators remain competitive while maintaining quality.—
Sixteen Ramos,
USA Today,
22 Oct. 2025
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BofA also points to a record 54% of investors who now believe that AI stocks are in a bubble, according to its most recent Global Fund Manager Survey—another reason for heightened vigilance around the market’s uneasy exuberance.—
Nick Lichtenberg,
Fortune,
22 Oct. 2025
Cite this Entry
“Red alert.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20alert. Accessed 31 Oct. 2025.
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