Dictionary.com

ill-founded

[ il-foun-did ]
/ ˈɪlˈfaʊn dɪd /
Save This Word!

adjective
based on weak evidence, illogical reasoning, or the like: an ill-founded theory.
QUIZ
SHALL WE PLAY A "SHALL" VS. "SHOULD" CHALLENGE?
Should you take this quiz on “shall” versus “should”? It should prove to be a quick challenge!
Question 1 of 6
Which form is used to state an obligation or duty someone has?

Origin of ill-founded

First recorded in 1665–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use ill-founded in a sentence

British Dictionary definitions for ill-founded

ill-founded

adjective
not founded on true or reliable premises; unsubstantiatedan ill-founded rumour
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
FEEDBACK