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.
In the winter-mild southern U.S. states, previously unheard-of snowfalls brought everything to a halt. Patty Templeton-Jones, Forbes.com, 16 Apr. 2025 The three-day stretch of the highest possible flooding threat is almost unheard-of outside hurricane season. Rebekah Riess, CNN Money, 5 Apr. 2025 Greatest Hits is fast approaching 850 total weeks on the Billboard 200 — an almost unheard-of achievement that places it among the longest-charting albums in the ranking’s history. Hugh McIntyre, Forbes.com, 31 Mar. 2025 Soon, Carolco ran up the bills again paying the unheard-of $3 million price tag for Joe Eszterhas’ Basic Instinct (1992) script. Chris Yogerst, HollywoodReporter, 30 Mar. 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 23 Apr. 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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