alert 1 of 3

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

Antonyms & Near Antonyms

alert

3 of 3

adjective

1
2
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

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

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of alert
Noun
As 9to5Mac reports, hypertension alerts will become available in over 150 countries and regions, including the US and the EU, next week. PC Magazine, 12 Sep. 2025 Over time, the data collected can reveal signs of hypertension and trigger an alert. Alice Park, Time, 12 Sep. 2025
Verb
Jackson officials alerted the FBI and federal prosecutors. Jay Weaver, Miami Herald, 12 Sep. 2025 The suspect, 22-year-old Tyler Robinson, was taken into custody after a family member alerted authorities. Amanda Castro joshua Rhett Miller, MSNBC Newsweek, 12 Sep. 2025
Adjective
That said, since Steal a Brainrot lives on a platform that may pose dangers to kids, parents should stay alert. Annabelle Canela, Parents, 5 Sep. 2025 An unknown person pulled the baby out from under the vehicle, per reports, and Sheriff’s Office bodycam footage of the incident showed one police officer who said the infant was alert and crying. Pam Defiglio, Chicago Tribune, 5 Sep. 2025 See All Example Sentences for alert
Recent Examples of Synonyms for alert
Noun
  • Graphic videos of both atrocities spread quickly and widely online this week, appearing in people's social media feeds, often with little-to-no warning.
    Charles Trepany, USA Today, 12 Sep. 2025
  • Qatar also boasts one of the most advanced early warning radar systems in the region, coupled with Patriot air defense missile system.
    Oren Liebermann, CNN Money, 11 Sep. 2025
Noun
  • This patience is watchfulness, not idleness.
    Francois Botha, Forbes.com, 7 Sep. 2025
Verb
  • Officials in Moscow have also warned that NATO's actions against such craft would constitute a dangerous escalation of the standoff between Moscow and its Western adversaries.
    David Brennan, ABC News, 15 Sep. 2025
  • Supporters, meanwhile, warned of cultural fragmentation if English lost its primacy.
    Doug Melville, Forbes.com, 15 Sep. 2025
Adjective
  • The watch also includes Sleep Score, which breaks down sleep stages such as core, deep and awake to give users a clearer picture of rest quality.
    Kurt Knutsson, FOXNews.com, 11 Sep. 2025
  • Nightmares about what happened — both on the street and in the hospital — keep him awake.
    Cara Anthony, CNN Money, 11 Sep. 2025
Adjective
  • Employers increasingly wonder whether campuses are cultivating independent thinkers or just cautious followers.
    Sarah Hernholm, Forbes.com, 17 Sep. 2025
  • The sum dwarfs most acquisitions this year — and marks TIFF’s first eight-figure deal in several editions — underlining the resilience of genre cinema at a time when studios and streamers alike are cautious.
    Scott Roxborough, HollywoodReporter, 16 Sep. 2025
Adjective
  • For organizations that are serious about modernizing their platforms and adopting AI to drive efficiency and growth, intelligent archiving should be a core part of their digital transformation and data readiness strategies.
    Sean Nathaniel, Forbes.com, 16 Sep. 2025
  • Bob was charismatic, intelligent, intense, always interesting— and one of the finest actors ever.
    Christian Blauvelt, IndieWire, 16 Sep. 2025
Adjective
  • Additionally, the company stands out by prioritizing culture and vision over quick commissions.
    William Jones, USA Today, 11 Sep. 2025
  • Roberson, leader of the church since 2023, has also opened the doors of the Cathedral from Monday-Saturday for tours, prayers or anyone walking by who needs a quick respite from the Miami heat.
    Lauren Costantino, Miami Herald, 10 Sep. 2025
Noun
  • Under his watch, the once-traditional fast-food chain had launched updatable menu screens in all restaurants and a sophisticated mobile app.
    Elie Ofek, Harvard Business Review, 14 Sep. 2025
  • Ham-And-Cheese Sliders Grandma's stash of Hawaiian rolls is the secret to the perfect sliders, especially for a Sunday football watch party.
    Symiah Dorsey, Southern Living, 14 Sep. 2025

Browse Nearby Words

Cite this Entry

“Alert.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/alert. Accessed 18 Sep. 2025.

More from Merriam-Webster on alert

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!