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.
Iñárritu kept the momentum pushing forward with The Revenant and managed the unheard-of feat of winning back-to-back directing Oscars. Kevin Dolak, HollywoodReporter, 27 Mar. 2025 Incarceration is not an unheard-of tactic in Turkey to silence opposition figures. Ahmet T. Kuru, The Conversation, 19 Mar. 2025 He was given an unheard-of seven-year contract to build the next great Penguins team. Rob Rossi, The Athletic, 13 Mar. 2025 The increasing sophistication of AI agents—smart structures created to carry out activities independently—and their incorporation into numerous industries is opening up previously unheard-of possibilities. Vamsi Gosu, Forbes, 11 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 31 Mar. 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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