as in to alert
to give notice to beforehand especially of danger or risk
the lifeguard warned the boys that if they continued playing so rough, someone was sure to get hurt
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Recent Examples of warn
The City of Annapolis warns drivers to be cautious of the potentially dangerous roads and the crews treating the roads.
—
Adam Thompson, CBS News, 23 Jan. 2026
The state’s Legislative Analyst’s Office has acknowledged this influx but warns of a stock bubble that may burst.
—Howard Blume, Los Angeles Times, 22 Jan. 2026
Oklahomans are bracing for what could be the most impactful storm of winter, set to bring a combination of snow, ice and frigid weather, which forecasters warn could knock out power and snarl travel for days as freezing temperatures persist.
—Cheyenne Derksen, Oklahoman, 22 Jan. 2026
An increase in violent gun incidents could lead to curtailed hours and other safety measures in Fort Lauderdale’s party spots, commissioners warned.
—Susannah Bryan, Sun Sentinel, 22 Jan. 2026
See All Example Sentences for warn
Adam Thompson, CBS News, 23 Jan. 2026
The state’s Legislative Analyst’s Office has acknowledged this influx but warns of a stock bubble that may burst.
—Howard Blume, Los Angeles Times, 22 Jan. 2026
Oklahomans are bracing for what could be the most impactful storm of winter, set to bring a combination of snow, ice and frigid weather, which forecasters warn could knock out power and snarl travel for days as freezing temperatures persist.
—Cheyenne Derksen, Oklahoman, 22 Jan. 2026
An increase in violent gun incidents could lead to curtailed hours and other safety measures in Fort Lauderdale’s party spots, commissioners warned.
—Susannah Bryan, Sun Sentinel, 22 Jan. 2026
See All Example Sentences for warn
Recent Examples of Synonyms for warn
Verb
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The technology uses sound to detect gunfire and alerts police departments to the area of that sound.—
Ben Wheeler,
Kansas City Star,
12 Jan. 2026
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Police alerted her of the break-ins on Sunday morning.—
Dennis Valera,
CBS News,
12 Jan. 2026
Verb
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In a Facebook post, the CAIC advised skiers to be aware of areas with the highest avalanche danger.—
Christa Swanson,
CBS News,
11 Jan. 2026
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Last January, Navajo leaders advised citizens to carry their Certificate of Indian Blood or tribal identification card.—
Michael Loria,
USA Today,
11 Jan. 2026
Cite this Entry
“Warn.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/warn. Accessed 26 Jan. 2026.
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