unheard-of

adjective

un·​heard-of ˌən-ˈhərd-ˌəv How to pronounce unheard-of (audio)
-ˌäv
: previously unknown
especially : unprecedented
moving at unheard-of speeds

Examples of unheard-of in a Sentence

houses selling at unheard-of prices
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.
That, according to corporate-governance veteran Nell Minow, is almost unheard-of in the C-suite. Eva Roytburg, Fortune, 2 Sep. 2025 Arthur Ashe Stadium should be near its 24,000 capacity for the semifinals and finals Wednesday night, an unheard-of crowd for a doubles competition. Matthew Futterman, New York Times, 20 Aug. 2025 This summer, Ryan Coogler’s Sinners saw a second-weekend drop of less than 5 percent, an unheard-of low decline these days. Pamela McClintock, HollywoodReporter, 20 Aug. 2025 Don’t miss this price drop on the HP Omen Max, which sees an unheard-of $1,150 price drop. Jade Chung-Lee, PC Magazine, 27 June 2025 See All Example Sentences for unheard-of

Word History

First Known Use

1592, in the meaning defined above

Time Traveler
The first known use of unheard-of was in 1592

Browse Nearby Words

Cite this Entry

“Unheard-of.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unheard-of. Accessed 9 Sep. 2025.

Kids Definition

unheard-of

adjective
un·​heard-of
-ˌəv,
-ˌäv
: previously unknown : unprecedented
moving at unheard-of speeds

More from Merriam-Webster on unheard-of

Last Updated: - Updated example sentences
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