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

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

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 warn However, a break below the mid-September lows on the S&P 500 near 7,500 would warn that something more than a routine pullback is unfolding. — Michael Santoli, CNBC, 20 Oct. 2026 Elsewhere in the world, authorities have warned of growing threats to lawmakers. — ABC News, 20 Oct. 2026 James Carville warns slim majority for Democrats would mean House is 'hostage' to DSA. — FOXNews.com, 20 Oct. 2026 Were there warning signs ahead of time, and what did people around him do about them? — Eric Levenson, CNN Money, 20 Oct. 2026 See All Example Sentences for warn
Recent Examples of Synonyms for warn
Verb
  • The advance notice allowed Baugh and his colleagues to alert dozens of grooms living in the barns to evacuate before the flood reached them.
    — Abe Streep, ProPublica, 21 Oct. 2026
  • An employee at the company, MC Tank Transport, called 911 to alert authorities to the release Tuesday night, Kapszukiewicz said.
    — Rebecca Cohen, NBC news, 21 Oct. 2026
Verb
  • Solomon Rivera went from a job advising Mayor Karen Bass to running an outside campaign committee supporting her reelection months later, causing some experts to question whether the committee is independent.
    — David Zahniser, Los Angeles Times, 26 Oct. 2026
  • Jokilehto advised that invitations should list the names of the people in the household that are invited.
    — Kristen Rogers, CNN Money, 26 Oct. 2026

Browse Nearby Words

Cite this Entry

“Warn.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/warn. Accessed 27 Oct. 2026.

Love words? Need even more definitions?

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

More from Merriam-Webster