unsubstantiated
Americanadjective
-
not substantiated; unproved or unverified.
unsubstantiated allegations.
-
being without form or substance.
adjective
Etymology
Origin of unsubstantiated
First recorded in 1765–75; un- 1 + substantiate + -ed 2
Vocabulary lists containing unsubstantiated
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Fifa has now itself hit out at "unsubstantiated assertions and demonstrably false claims", adding that "speculation and insinuation should not be presented as fact".
From BBC ● Aug. 8, 2026
Monroe’s personal legacy is like a charm bracelet hung with more unsubstantiated rumors than genuine facts, but one undeniable trait was her thirst to defy the world’s expectations.
From Salon ● Jul. 6, 2026
He added that the bank at Treasury’s request arranged for several independent reviews of its operations that found the allegations were unsubstantiated.
From The Wall Street Journal ● May 11, 2026
The piece argues that Pratt showed sufficient composure and charm while displaying deference to moderators and occasionally yielding speaking time to Bass, though the article notes he occasionally lapsed into mockery and made unsubstantiated characterizations.
From Los Angeles Times ● May 6, 2026
An unsubstantiated report alleges that a Ridgeback carried off a whale calf off the coast of Norway in 1802.
From "Fantastic Beasts and Where to Find Them" by J.K. Rowling
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
