ill-founded

[il-foun-did]
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Origin of ill-founded

First recorded in 1665–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018


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British Dictionary definitions for ill-founded

ill-founded

adjective
  1. 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