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Definitions

unheard-of

[uhn-hurd-uhv, -ov, -uhv] / ʌnˈhɜrdˌʌv, -ˌɒv, -əv /


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"That's an unheard-of pace of innovation in developing complex structural alloys."

From Science Daily • Mar. 10, 2026

She also commissioned original scores from American composers, choosing to use contemporary music from her own country—an unheard-of thing to do when she began, Ross says.

From The Wall Street Journal • Jan. 25, 2026

His thesis at the Navy Academy was in the unheard-of topic of liquid-fuel engines.

From BBC • Aug. 9, 2025

And it has highlighted the challenges of preparing for unheard-of weather events, like a hurricane in the mountains.

From Slate • Nov. 2, 2024

Rolled back into another claiming race just four days later, he broke a track record, an unheard-of feat for a claimer.

From "Seabiscuit: An American Legend" by Laura Hillenbrand