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Synonyms

ill-defined

American  
[il-di-fahynd] / ˈɪl dɪˈfaɪnd /

adjective

  1. badly or inadequately defined; vague.

    He confuses the reader with ill-defined terms and concepts.


ill-defined British  

adjective

  1. imperfectly defined; having no clear outline

"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

Etymology

Origin of ill-defined

First recorded in 1865–70

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.

The space was dark, ill defined, the edges fading into misty nothingness — the antithesis of the sharply defined spaces my friend preferred.

From Nature • Jul. 21, 2020

Size-distributions of pandemics, floods, forest fires, earthquakes, wars, terrorist attacks, crimes and IT investments, e.g., have no population mean, or the mean is ill defined due to infinite variance.

From Salon • Jul. 5, 2020

But little in medicine is as ill defined or as anecdotal as addiction treatment.

From The New Yorker • Oct. 14, 2019

It's about those here legally, with green cards, who commit an offense that is ill defined.

From New York Times • Apr. 17, 2018

Nevertheless, an ill defined, yet none the less real, fear was steadily taking possession of me.

From A Cabinet Secret by Boothby, Guy Newell

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