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.
For a candidate to alienate the most powerful individuals in their political party even before a race gets going seriously is an unheard-of no-no. Thomas Elias, Mercury News, 14 Oct. 2025 Coach Outlet’s Fall Favorites Event is bringing discounts of up to 70% off the house’s leather goods and ready-to-wear, which translates to some unheard-of prices. Jake Henry Smith, Glamour, 13 Oct. 2025 Outland Living Firebowl Smokeless Fire Pit With more than 1,700 five-star ratings and an unheard-of overall rating of 4.8 stars, this outdoor firepit is beloved for its portability, size, and ease of use. Stephanie Osmanski, Better Homes & Gardens, 8 Oct. 2025 Making the succession more intriguing, Catz has been elevated to the board of directors with a previously unheard-of title, while founder Larry Ellison continues as chairman of the board and chief technology officer, but with duties that are by no means transparent. Geoff Colvin, Fortune, 24 Sep. 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 28 Oct. 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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