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undiagnosed

British  
/ ˌʌndaɪəɡˈnəʊzd /

adjective

  1. (of a medical condition, a problem, etc) not having been identified

"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

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.

From almost 40,000 women aged 14 to 35 who had heart checks, 175 were found to have undiagnosed issues, despite appearing fit and healthy, with 94 at high risk of sudden cardiac death.

From BBC • May 31, 2026

Some estimates suggest that a significant share of patients remain undiagnosed or misdiagnosed for years, often cycling through providers before receiving a clear explanation for their symptoms.

From Salon • May 16, 2026

As a kid with learning differences, whose undiagnosed dyslexia put him behind in school.

From Los Angeles Times • Mar. 4, 2026

In reality, at 57, I had undiagnosed Alzheimer’s disease.

From The Wall Street Journal • Feb. 3, 2026

Frequently this undiagnosed dement has satisfied himself with a weak, cynical philosophy that life is not worth while.

From Benign Stupors A Study of a New Manic-Depressive Reaction Type by MacCurdy, John T. (John Thompson)

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