1
as in carefulness
a close attentiveness to avoiding danger
drove through the fog with extra alertness, as the road signs repeatedly warned of deer and moose crossings
Synonyms & Similar Words
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Antonyms & Near Antonyms
2
as in watchfulness
the state of being constantly attentive and responsive to signs of opportunity, activity, or danger
we observed the U.S. border patrol's intensified alertness for drug smugglers at the border stations
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
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Recent Examples of alertness
Known to power all-around mental clarity, alertness, and focus, this powder is an ideal pick-me-up for a post-lunch afternoon work slump or mid-morning meeting.
—
Brianna Peters, Vogue, 1 Oct. 2025
However, this depression of the CNS may result in drowsiness, sedation, and lack of mental alertness.
—Alex Yampolsky, Verywell Health, 29 Sep. 2025
Keeping your hands free while solo and on the move enhances alertness by minimizing distractions and improves reaction time for unexpected situations.
—Kristy Alpert, Travel + Leisure, 28 Sep. 2025
Pre- and post-mission evaluations will be compared to in-flight data to better understand how the deep space mission influences the crew's alertness, stress and ability to work together cohesively.
—Josh Dinner, Space.com, 17 Sep. 2025
Morning sunlight signals the brain to wake fully, thus elevating alertness and setting the body’s internal clock.
—Julian Hayes Ii, Forbes.com, 14 Sep. 2025
Caffeine is a stimulant that boosts alertness, energy and brain activity.
—Dr. Mark Corkins, Boston Herald, 14 Sep. 2025
An article previously shared by Newsweek explains that cats' sleeping postures can communicate comfort, alertness, or even stress.
—Maria Azzurra Volpe, MSNBC Newsweek, 11 Sep. 2025
Depending on your tolerance, this could be too much—or just the right amount—to help increase alertness.
—Allison Forsyth, Health, 10 Sep. 2025
Brianna Peters, Vogue, 1 Oct. 2025
However, this depression of the CNS may result in drowsiness, sedation, and lack of mental alertness.
—Alex Yampolsky, Verywell Health, 29 Sep. 2025
Keeping your hands free while solo and on the move enhances alertness by minimizing distractions and improves reaction time for unexpected situations.
—Kristy Alpert, Travel + Leisure, 28 Sep. 2025
Pre- and post-mission evaluations will be compared to in-flight data to better understand how the deep space mission influences the crew's alertness, stress and ability to work together cohesively.
—Josh Dinner, Space.com, 17 Sep. 2025
Morning sunlight signals the brain to wake fully, thus elevating alertness and setting the body’s internal clock.
—Julian Hayes Ii, Forbes.com, 14 Sep. 2025
Caffeine is a stimulant that boosts alertness, energy and brain activity.
—Dr. Mark Corkins, Boston Herald, 14 Sep. 2025
An article previously shared by Newsweek explains that cats' sleeping postures can communicate comfort, alertness, or even stress.
—Maria Azzurra Volpe, MSNBC Newsweek, 11 Sep. 2025
Depending on your tolerance, this could be too much—or just the right amount—to help increase alertness.
—Allison Forsyth, Health, 10 Sep. 2025
Recent Examples of Synonyms for alertness
Noun
-
Just as essential a consideration as carefulness for committee members, though, is speed.—
Chris Stirewalt,
The Hill,
26 Aug. 2025
Noun
-
This patience is watchfulness, not idleness.—
Francois Botha,
Forbes.com,
7 Sep. 2025
Noun
-
These require wearing full protective clothing and should be used with caution.—
Brandee Gruener,
Southern Living,
5 Oct. 2025
-
Ben Rhodes, the two-time series champion, crashed into the wall on Lap 3 with heavy contact as his back bumper got into the tire barrier, bringing out the first caution — and only natural one until the final laps of regulation — of the race.—
Shane Connuck
October 3,
Charlotte Observer,
3 Oct. 2025
Noun
-
Recent years have seen dozens of drownings in the region, underscoring the need for vigilance and adherence to official warnings.—
Anna Skinner,
MSNBC Newsweek,
30 Sep. 2025
-
In summary, when facing the threat of lightning, vigilance and preparedness are your best allies.—
Southern California Weather Report,
Oc Register,
29 Sep. 2025
Noun
-
Late public school buses and needing to take care of an occasionally sick child, along with at capacity or costly child care centers, contributed to her precarious employment.—
Elizabeth B. Kim,
Cincinnati Enquirer,
6 Oct. 2025
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While the exact date of the ownership change is still unknown, operations will shift under the United Community Center — including a new age cap of 3 years for on-campus care and a schedule that no longer aligns with Alverno’s academic breaks.—
Gina Lee Castro,
jsonline.com,
6 Oct. 2025
Noun
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This watch guide was created using technology provided by Data Skrive.—
Data Skrive,
New York Times,
6 Oct. 2025
-
How the team adjusts in their first game without their best player will be worth the watch.—
Miami Herald,
Miami Herald,
5 Oct. 2025
Noun
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Additionally, a boom-and-bust cycle in the early 2000s informs some of the company’s prudence on expansion.—
Zev Fima,
CNBC,
19 Sep. 2025
-
Meanwhile, Taiwan’s military should exercise prudence in its rules of engagement and not assume that every close call is intentional.—
JOEL WUTHNOW,
Foreign Affairs,
12 Sep. 2025
Noun
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Be sure to sign up for text alerts and follow us on Instagram, TikTok and Flipboard to stay updated!—
Kasey Caminiti,
USA Today,
4 Oct. 2025
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The alert is for Ashe, Alleghany and Watauga counties.—
NC Weather Bot,
Charlotte Observer,
4 Oct. 2025
Cite this Entry
“Alertness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/alertness. Accessed 9 Oct. 2025.
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