- not substantiated; unproved or unverified: unsubstantiated allegations.
- being without form or substance.
Origin of unsubstantiated
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for unsubstantiated
One commenter wrote that this unsubstantiated rumor clearly meant that “Rihanna had what was coming to her.”Why We're So Hard on Janay Rice and Celebrity Survivors of Abuse
September 15, 2014
This in no way changes the fact that Bryan Singer is innocent of these unsubstantiated lies.Bryan Singer Agreed to Settle Sex Abuse Lawsuit for $100,000, but Insists He’s Innocent
July 29, 2014
This is just the latest example of contradictory and unsubstantiated information from unnamed sources leaking from Kuala Lumpur.Who Gagged the Search for MH370?
June 22, 2014
“Whispers” in this case, means “unsubstantiated and probably made up rumors.”Solange Is Blue Ivy’s Mom and Other Crazy Conspiracy Theories
May 15, 2014
An unsubstantiated survey reports that 15.1 million of them are still shocked that Jeff Daniels won.Emmy Awards Score Ratings High, Jon Hamm May Undergo Surgery
September 23, 2013
As yet he could not reveal his unsubstantiated information to another.The Roof Tree
Charles Neville Buck
He conscientiously avoids the vague, the doubtful, the unsubstantiated.
The articles seemed woven of fact, but she could not accept them unsubstantiated.To Him That Hath
But he couldn't prove it, and she wasn't likely to accept his unsubstantiated word.Forget Me Nearly
Floyd L. Wallace
Then follows the unsubstantiated story which has done duty for Shakspeare and many other poets.Robert Burns
- not established as valid or genuineunsubstantiated allegations
Word Origin and History for unsubstantiated
Online Etymology Dictionary, © 2010 Douglas Harper