- without foundation; not based on fact, realistic considerations, or the like: unfounded suspicions.
- not established; not founded: the prophet of a religion as yet unfounded.
Origin of unfounded
SynonymsSee more synonyms on Thesaurus.com
1. groundless, idle, false, unjustified, unsubstantiated.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for unfounded
In this, I would later figure out that both of those concerns were unfounded.Neil deGrasse Tyson Breaks Down ‘Interstellar’: Black Holes, Time Dilations, and Massive Waves
November 11, 2014
But it is unfounded fear by an American public at minimal risk of contracting the illness that is confounding those efforts.Quarantine Turns Ebola Heroes Into Pariahs
October 28, 2014
Health officials , doctors and researchers roundly agree that these concerns are unfounded.Mississippi: Last In Everything, First In Vaccinations
October 17, 2014
One might wonder if Mario thinks that Judge Rakoff, too, had reached an “outrageous, unfounded conclusion” about his son.Andrew Cuomo’s Do-Gooders Done Wrong
July 28, 2014
Barry described the reports of him having affairs as “unfounded” and “crazy.”Speed Read: Marion Barry’s Crazy Memoir
June 18, 2014
They were soon satisfied that this supposition was unfounded.Chronicles of Border Warfare
Alexander Scott Withers
This report of the provisions of the city appeared, in the sequel, to be unfounded.Journal of a Residence at Bagdad
I awake suddenly to find that my nightmare has not been unfounded.The Pearl of the Antilles, or An Artist in Cuba
No; the faith of the party of freedom in the Negro has not been unfounded.
But my fears were unfounded: soon I saw these figures making their escape.Beyond the Vanishing Point
Raymond King Cummings
- (of ideas, allegations, etc) baseless; groundless
- not yet founded or established
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for unfounded
Online Etymology Dictionary, © 2010 Douglas Harper