worst nightmare

noun

: the thing someone fears most
Losing a child is every parent's worst nightmare.

Examples of worst nightmare in a Sentence

Recent Examples on the Web
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.
What would have been an acrophobic’s worst nightmare was just a warmup for 5SOS, who kept the party going well into the night with CLUBSOS, their official Lollapalooza afterparty and inaugural DJ set. — Larisha Paul, Rolling Stone, 6 Oct. 2026 Every Dolphins fans’ worst nightmare came true when Achane went down with a knee injury in the opening drive of the first quarter. — Miami Herald, 27 Sep. 2026 In retrospect, Bonilla, 31, finds great irony in how that initial foray into professional acting fictionally materialized her Mexican immigrant parents’ worst nightmare. — Carlos Aguilar, Los Angeles Times, 18 Sep. 2026 Generally speaking, red cards are a club analyst’s worst nightmare. — Jon MacKenzie, New York Times, 15 Sep. 2026 See All Example Sentences for worst nightmare

Browse Nearby Words

Cite this Entry

“Worst nightmare.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/worst%20nightmare. Accessed 9 Oct. 2026.

Love words? Need even more definitions?

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