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ill-defined

[il-di-fahynd] /ˈɪl dɪˈfaɪnd/
adjective
1.
badly or inadequately defined; vague:
He confuses the reader with ill-defined terms and concepts.
Origin
1865-1870
1865-70
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ill defined

ill-defined

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
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