unsubstantiated
adjective
un·sub·stan·ti·at·ed
ˌən-səb-ˈstan(t)-shē-ˌā-təd 
: not proven to be true : not substantiated
an unsubstantiated rumor/report
a plausible but unsubstantiated theory
Examples of unsubstantiated in a Sentence
an unsubstantiated claim that was thrown out of court
Recent Examples on the Web
The Geiers are widely viewed with contempt as promoters of unsubstantiated claims that vaccines cause autism.
—
Judy Stone, Forbes.com, 3 Sep. 2025
There were unsubstantiated reports of a gunman in the facility, and the ATF, in a joint operation with the New Orleans SWAT team, stormed the location with guns drawn to hunt down a gunman who never materialized.
—Mandi Wright, Freep.com, 31 Aug. 2025
Pulte's allegations against Cook closely echo similar unsubstantiated claims against other top Democrats.
—Steve Kopack, NBC news, 28 Aug. 2025
ByteDance has denied these claims, which remain unsubstantiated.
—Kinsey Crowley, USA Today, 27 Aug. 2025
See All Example Sentences for unsubstantiated
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Judy Stone, Forbes.com, 3 Sep. 2025
There were unsubstantiated reports of a gunman in the facility, and the ATF, in a joint operation with the New Orleans SWAT team, stormed the location with guns drawn to hunt down a gunman who never materialized.
—Mandi Wright, Freep.com, 31 Aug. 2025
Pulte's allegations against Cook closely echo similar unsubstantiated claims against other top Democrats.
—Steve Kopack, NBC news, 28 Aug. 2025
ByteDance has denied these claims, which remain unsubstantiated.
—Kinsey Crowley, USA Today, 27 Aug. 2025
See All Example Sentences for unsubstantiated
Cite this Entry
“Unsubstantiated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unsubstantiated. Accessed 9 Sep. 2025.
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