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[il-foun-did] /ˈɪlˈfaʊn dɪd/
based on weak evidence, illogical reasoning, or the like:
an ill-founded theory.
Origin of ill-founded
1665-75 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for ill-founded
Historical Examples
  • Yet her faith in him was not ill-founded, for he returned like an echo as to promptitude.

    When Ghost Meets Ghost William Frend De Morgan
  • It will be seen hereafter, that this apprehension was not ill-founded.

  • We do not know to what extent an ill-founded certitude of fraud can be responsible for its birth.

  • And Artois said to himself that the faint suspicion he had had was ill-founded.

    A Spirit in Prison Robert Hichens
  • Thus were announced the crime of the 24th of March and the not ill-founded suspicions of its authors.

    Memoirs of Napoleon Bonaparte, Complete Louis Antoine Fauvelet de Bourrienne
  • The problem did not seem to puzzle her, the problem of this feeling so ill-founded.

    The Call of the Blood Robert Smythe Hichens
  • No student of English political history before the Reform Bill can regard his apprehensions of a great catastrophe as ill-founded.

    Shelley John Addington Symonds
  • Well, all that would be ill-founded, unjust, and contrary to truth.

  • Such facts as are available suggest that these assumptions are ill-founded.

    The Negro at Work in New York City George Edmund Haynes
  • It has met the fears of dying men, by giving a system to their ill-founded hopes.

    Popery Edward Hoare
British Dictionary definitions for ill-founded


not founded on true or reliable premises; unsubstantiated: an 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
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