unsubstantiated

adjective
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

Examples of unsubstantiated in a Sentence

Recent Examples on the Web Oz and McCormick had avoided repeating Trump’s unsubstantiated claims that Democrats stole the 2020 presidential election from him in the battleground state. Marc Levy, BostonGlobe.com, 18 May 2022 Oz and McCormick had avoided repeating Trump's unsubstantiated claims that Democrats stole the 2020 presidential election from him in the battleground state. Marc Levy, ajc, 18 May 2022 After the election, Mastriano organized a hearing in Gettysburg that featured unsubstantiated claims of widespread fraud. Adam Brewster, CBS News, 16 May 2022 While only one of the Democratic incumbents has drawn a challenger, seven Republican secretaries will be facing at least one GOP opponent who either denies Biden won or makes unsubstantiated claims that elections are not secure. Christina A. Cassidy, Anchorage Daily News, 30 Apr. 2022 Natural News, an anti-vaccine website credited with being a leading spreader of conspiracy theories long before the pandemic, has published unsubstantiated claims about Disney in recent months. al, 28 Apr. 2022 Thus, some apps make unsubstantiated marketing claims, experts warn, or even worse, offer inaccurate and potentially harmful information. New York Times, 13 Apr. 2022 In a statement, the company said the FCC’s action — a continuation of an action begun in 2017 under President Trump — is based on unsubstantiated allegations. Andy Meek, BGR, 30 Mar. 2022 Trump repeated unsubstantiated claims of voter fraud, saying new findings from Georgia would emerge next week. Josh Dawsey, Anchorage Daily News, 7 Apr. 2022 See More

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.

First Known Use of unsubstantiated

circa 1775, in the meaning defined above

Learn More About unsubstantiated

Time Traveler for unsubstantiated

Time Traveler

The first known use of unsubstantiated was circa 1775

See more words from the same year

Dictionary Entries Near unsubstantiated

unsubstantiate

unsubstantiated

unsubstituted

See More Nearby Entries 

Statistics for unsubstantiated

Last Updated

21 May 2022

Cite this Entry

“Unsubstantiated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unsubstantiated. Accessed 24 May. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on unsubstantiated

Nglish: Translation of unsubstantiated for Spanish Speakers

WORD OF THE DAY

Test Your Vocabulary

Which Word Does Not Belong?

  • one green toy robot amidst many red toy robots
  • Which of these words does not mean "nonsense"?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!