un·​sub·​stan·​ti·​at·​ed | \ ˌən-səb-ˈstan(t)-shē-ˌā-təd How to pronounce unsubstantiated (audio) \

Definition of unsubstantiated

: not proven to be true : not substantiated an unsubstantiated rumor/report a plausible but unsubstantiated theory

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Examples of unsubstantiated in a Sentence

Recent Examples on the Web

The unsubstantiated allegations dominated media coverage for weeks. Washington Post, "After Sri Lanka attacks, Muslims face boycotts and violence," 8 July 2019 Authorities received reports of two incidents in which a man tried to lure an 11-year-old girl into his truck with treats, but investigations and surrounding video surveillance found the threats unsubstantiated. oregonlive.com, "No child-luring threat found after 2 reports, Gresham police say," 11 June 2019 Gartner received a letter dated March 6, 2017 saying his claims were found to be unsubstantiated. Kathryn Vasel, CNN, "Fired for being transgender: The fight for LGBTQ workers' rights," 14 June 2019 There are also curious and unsubstantiated reports of deep-sea fish burning up in the magma shift. David Grossman, Popular Mechanics, "French Island Might Be Sitting On Top of Gigantic Underwater Magma Shift," 20 Mar. 2019 But given omnipresent and unsubstantiated Republican warnings of voter fraud and election theft, the situation unfolding in the North Carolina Ninth is, if nothing else, rather remarkable. Dylan Scott, Vox, "There’s something very weird going on with this North Carolina House election," 30 Nov. 2018 But in the spirit of serving the public conversation, CNN’s Oliver Darcy decided to document some of those unsubstantiated rumors of Alex Jones’. Casey Newton, The Verge, "Twitter’s case for keeping Alex Jones is falling apart," 10 Aug. 2018 No one should have their professional reputation ruined by unsubstantiated rumors or be tried in the press where they are assumed guilty until proven innocent. Bethany Barnes, OregonLive.com, "Investigators say Portland teacher contract endangers children," 11 May 2018 In the 14 years since, the girls’ lives have been enveloped in secrecy—broken very occasionally by unsubstantiated rumors. Owen Matthews, Newsweek, "The Top Secret Family Life of Vladimir Putin," 19 Aug. 2014

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unsubstantiated.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of unsubstantiated

circa 1775, in the meaning defined above

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Statistics for unsubstantiated

Last Updated

14 Jul 2019

Look-up Popularity

Time Traveler for unsubstantiated

The first known use of unsubstantiated was circa 1775

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More Definitions for unsubstantiated



English Language Learners Definition of unsubstantiated

formal : not proven to be true

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More from Merriam-Webster on unsubstantiated

Thesaurus: All synonyms and antonyms for unsubstantiated

Spanish Central: Translation of unsubstantiated

Nglish: Translation of unsubstantiated for Spanish Speakers

Comments on unsubstantiated

What made you want to look up unsubstantiated? Please tell us where you read or heard it (including the quote, if possible).


to form ideas or theories about something

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