1
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
2
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
Antonyms & Near Antonyms
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
Antonyms & Near Antonyms
1
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
Antonyms & Near Antonyms
2
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
Antonyms & Near Antonyms
3
as in intelligent
having or showing quickness of mind
an alert and well-trained sheep dog who can handle difficult situations
Synonyms & Similar Words
Antonyms & Near Antonyms
4
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
Antonyms & Near Antonyms
Example Sentences
Examples are automatically compiled from online sources to
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Recent Examples of alert
Kansas City Star, 7 Aug. 2025
The alert was also issued in El Dorado and Alpine counties.
—Darrell Smith, Sacbee.com, 6 Aug. 2025
Irene Wright, Miami Herald, 5 Aug. 2025
The third-party Transit app has begun using the agency’s data to alert riders when a scheduled bus has been canceled, the Chicago Sun-Times first reported Monday.
—Talia Soglin, Chicago Tribune, 5 Aug. 2025
Maria Azzurra Volpe, MSNBC Newsweek, 1 Aug. 2025
Here’s a breakdown of the four-tiered alert system from the NWS and what each level entails:
Tsunami warning: Immediate action required
This alert is issued when a tsunami that could result in widespread flooding is either expected or already underway.
—Southern California Weather Report, Oc Register, 30 July 2025
See All Example Sentences for alert
Noun
The traffic alert was reported Wednesday at 9:47 p.m., and the last update concerning this incident was provided on Wednesday at 9:52 p.m.
—Kansas City Star, 7 Aug. 2025
The alert was also issued in El Dorado and Alpine counties.
—Darrell Smith, Sacbee.com, 6 Aug. 2025
Verb
The call consists of a line of notes that taper off as the sound spreads, alerting passersby to the presence of a creature in a nearby stream.
—Irene Wright, Miami Herald, 5 Aug. 2025
The third-party Transit app has begun using the agency’s data to alert riders when a scheduled bus has been canceled, the Chicago Sun-Times first reported Monday.
—Talia Soglin, Chicago Tribune, 5 Aug. 2025
Adjective
However, despite all the efforts, only 11 percent of the ire has so far been contained, and official continue to warn residents to remains alert and follow evacuation orders.
—Maria Azzurra Volpe, MSNBC Newsweek, 1 Aug. 2025
Here’s a breakdown of the four-tiered alert system from the NWS and what each level entails:
Tsunami warning: Immediate action required
This alert is issued when a tsunami that could result in widespread flooding is either expected or already underway.
—Southern California Weather Report, Oc Register, 30 July 2025
See All Example Sentences for alert
Recent Examples of Synonyms for alert
Noun
-
The warning is for Greene, Lenoir and Pitt counties.—
NC Weather Bot,
Charlotte Observer,
13 Aug. 2025
-
By the end of July, The Wall Street Journal and CNN reported that Trump had received a warning from Attorney General Pam Bondi that his name appeared in Epstein's criminal investigation files.—
Jolene Almendarez,
The Enquirer,
13 Aug. 2025
Verb
-
The bill in early March drew a significant fiscal note, which warned the costs of the legislation were hard to determine but the state could lose more than $1 billion in federal funding over the measure.—
Vivian Jones,
The Tennessean,
21 Aug. 2025
-
Officials warned the road – known to flood even during seasonal high tides – could be impassable for days.—
Dinah Voyles Pulver,
USA Today,
21 Aug. 2025
Adjective
-
Our brains interpret light as a signal to stay awake and darkness as a cue to fall asleep.3 Blue light, the type emitted by phones, sends an especially strong signal to the brain.—
Julia Ries,
Health,
12 Aug. 2025
-
But just as these two were unable to stay awake through their first date, their adult bodies aren’t cut out for this trip down memory lane, either.—
Genevieve Koski,
Vulture,
6 Aug. 2025
Adjective
-
Be cautious when corresponding with unfamiliar accounts.—
Tamia Fowlkes,
jsonline.com,
14 Aug. 2025
-
To be sure, companies are opting for cautious messaging around AI and its labor implications.—
Pia Singh,
CNBC,
13 Aug. 2025
Adjective
-
The scaling hypothesis—the belief that bigger models will produce more intelligent outputs—seems to rest on the dubious belief that a system that has been fed enough information about the world will not have to deal with fuzziness.—
Meghan O’Gieblyn,
Harpers Magazine,
20 Aug. 2025
-
Across a wide network, each unit can become intelligent by deploying state-of-the-art technologies and AI, but also by gaining easy access to insights from more successful locations.—
Andrei Danescu,
Forbes.com,
20 Aug. 2025
Adjective
-
Isak himself stressed his happiness in the spring and featured in club kit promotions, hardly the actions of someone desperate for a quick exit.—
Harry De Cosemo,
Forbes.com,
14 Aug. 2025
-
Here's a quick look at Cox plan options in Phoenix, based on the ZIP code 85014: Cox Fast: Starts at $50 per month for download and upload speeds of 300/30 Mbps for 24 months.—
Kara McGinley,
USA Today,
14 Aug. 2025
Noun
-
Republican Governor Tate Reeves speaks with supporters during an election night watch party at the Refuge Hotel & Conference Center in Flowood, Mississippi, on November 7, 2023.—
Aliss Higham,
MSNBC Newsweek,
14 Aug. 2025
-
But these videos were few and far between—other people can be an obstacle to running your life with the precision of a ticking watch.—
Julie Beck,
The Atlantic,
14 Aug. 2025
Adjective
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Child and pet safety: Be vigilant about never leaving young children and pets in vehicles without supervision, especially during periods of intense heat, as car interiors can quickly become extremely hot.—
Bay Area Weather Report,
Mercury News,
20 Aug. 2025
-
Prioritize child and pet safety: Be vigilant about never leaving young children and pets in vehicles without supervision, especially during periods of intense heat, as car interiors can quickly become extremely hot.—
CA Weather Bot,
Sacbee.com,
19 Aug. 2025
Cite this Entry
“Alert.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/alert. Accessed 23 Aug. 2025.
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