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.
Related article First image from the world’s largest solar telescope captures the sun in unheard-of detail Astronomers observed a collision between two neutron stars in 2017. Ashley Strickland, CNN Money, 3 May 2025 Canady, the national player of the year, had received a $1 million NIL deal — an unheard-of amount outside of football and men’s basketball. Stewart Mandel, New York Times, 1 May 2025 In order to acquire Sinners, Warner Bros. even agreed to revert the rights back to the director after 25 years, an unusual (although not unheard-of) proviso. David Sims, The Atlantic, 25 Apr. 2025 Viganò took the unheard-of step of calling for Francis to resign. Christopher Lamb, CNN Money, 21 Apr. 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 19 May. 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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