Longman Dictionary of Contemporary English
Douglas Harper's Etymology Dictionary
1775, from un- (1) "not" + past participle of substantiate (v.).
Wiktionary
a. Lacking substantiation; without evidence.
WordNet
adj. unsupported by nother evidence [syn: uncorroborated]
Usage examples of "unsubstantiated".
Defendant has repeatedly made ugly, false, and unsubstantiated claims against the family, including claims of pedophilia, drug use and dealing, and financial fraud, all of which have been rejected by the Court in Deschutes County.
He employed leading, loaded questions unsubstantiated by facts, interrupted by clowning, but hammering home his contention that profits from Tunipah would be excessive and were the major motivation.
While the mainstream press still avoided printing unsubstantiated rumors, the supermarket tabloids were offering cash for shocking stories from Arkansas.
Without credible evidence, a call for a special prosecutor would set a terrible precedent: From then on, every unsubstantiated charge against a President concerning events during any period of his life could require a special prosecutor.
The escalation of the computer malfunction was no longer an unsubstantiated theory, it was fact.
He had no authority for his actions but his own unsubstantiated fears.
But the Ethics Act required that he determine that the allegations are so unsubstantiated that no further investigation was warranted.
Concocting plausible but unsubstantiated reasons why any historical figure that somebody disliked or disagreed with had been a Jevlenese agent had become something of a game in the popular media.
In the court cases involving guardianship and conservatorship of the couple’s son, the Defendant has repeatedly made ugly, false, and unsubstantiated claims against the family, including claims of pedophilia, drug use and dealing, and financial fraud, all of which have been rejected by the Court in Deschutes County.
Pittman had expected more of the unsubstantiated chargesthat he had heard from Denning seven years earlier.
There are unsubstantiated claims of chemical and ecological warfare using agrarian toxins.
He wouldn't have had to actually 'suppress' it, because passing what started out as little more than unsubstantiated rumors along to me was a pure judgment call on his part.
They claim a positive economic impact of $111 million annuallyan unsubstantiated puffery based on some of the wildest calculations you ever saw.
Do you think you have a monopoly on tainting people with unsubstantiated charges.