unexplained

adjective

un·​ex·​plained ˌən-ik-ˈsplānd How to pronounce unexplained (audio)
: not explained or accounted for
an unexplained error
an unexplained delay

Examples of unexplained in a Sentence

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 2024, the Pentagon released hundreds of reports of unidentified and unexplained aerial phenomena. ABC News, 4 Apr. 2026 Over decades, London has become a safety-deposit box for the global, uber-rich to stash unexplained wealth, often in multi-million dollar homes that sit dark and empty most of the year. Frank Langfitt, NPR, 4 Apr. 2026 That unexplained gap first appeared around 2015, following a major refinery outage, and has remained ever since. Richard Ramos, CBS News, 3 Apr. 2026 This uneven distribution remained unexplained because existing models could not replicate the degree of the asymmetry seen in physical tests. Aman Tripathi, Interesting Engineering, 3 Apr. 2026 See All Example Sentences for unexplained

Word History

First Known Use

1721, in the meaning defined above

Time Traveler
The first known use of unexplained was in 1721

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Cite this Entry

“Unexplained.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unexplained. Accessed 8 Apr. 2026.

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