Definition of warnnext
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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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 warn On Thursday, the Supreme Court ruled 7-2 in favor of Bayer’s Monsanto, the maker of the powerful weedkiller Roundup, shielding it from thousands of state lawsuits that allege the company failed to warn people the product could cause cancer. Los Angeles Times, 26 June 2026 Critics warn the measure could spook some of California’s highest earners into moving out of fear of future taxes, jeopardizing the state’s long-term fiscal health. Ben Paviour, Sacbee.com, 26 June 2026 However, Iran’s Islamic Revolutionary Guard Corps Navy on Thursday warned that safe passage through the Strait of Hormuz would only be permitted via routes designated by Tehran, highlighting that risks to the key shipping lane remain. Lee Ying Shan, CNBC, 25 June 2026 The company warns, in the muffled prose of a risk factor, that a credit downgrade could push up its borrowing costs and even change the terms of its data-center leases. Dara-Abasi Ita, Forbes.com, 25 June 2026 See All Example Sentences for warn
Recent Examples of Synonyms for warn
Verb
  • Someone alerted authorities about the trailer in August 2022 after seeing small fingers reaching through gaps in the doors.
    Arkansas Online, Arkansas Online, 28 June 2026
  • But tracing exactly where neutrinos come from when detectors such as Antarctica’s IceCube Neutrino Observatory alert their presence has proven more difficult for astronomers.
    Ashley Strickland, CNN Money, 26 June 2026
Verb
  • Agriculture regulators advise home gardeners to either consume homegrown produce on site or not move it at all from the property to prevent the spread of the fly to nearby regions.
    Kori McNair, Los Angeles Times, 30 June 2026
  • Republicans have repeatedly echoed the concerns of the Legislative Analyst’s Office — which advises the Legislature on fiscal matters — about the state’s spending.
    Stephen Hobbs, Sacbee.com, 30 June 2026

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“Warn.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/warn. Accessed 1 Jul. 2026.

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