undiagnosed

adjective

un·​di·​ag·​nosed ˌən-ˌdī-ig-ˈnōst How to pronounce undiagnosed (audio)
-əg-,
-zd
: not diagnosed : not identified through diagnosis
an undiagnosed illness
… the symptoms of the syndrome may be subtle and thus may remain undiagnosed.Dwight R. Robinson
a condition that often goes undiagnosed

Examples of undiagnosed in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
That's largely because of cases that would go undiagnosed as efforts by health care workers to find people living with TB wither. Jonathan Lambert, NPR, 11 Sep. 2025 Research suggests that a lot of people with these conditions go misdiagnosed or undiagnosed for years. Korin Miller, SELF, 11 Sep. 2025 Young people are the most likely to go undiagnosed, despite facing serious long-term risks, such as heart disease, kidney failure, blindness and nerve damage, according to the study. Khloe Quill, FOXNews.com, 10 Sep. 2025 Diagnoses were based on medical records, which may miss undiagnosed cases or fail to capture symptom severity. Lucy Notarantonio, MSNBC Newsweek, 10 Sep. 2025 See All Example Sentences for undiagnosed

Word History

First Known Use

1864, in the meaning defined above

Time Traveler
The first known use of undiagnosed was in 1864

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Cite this Entry

“Undiagnosed.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undiagnosed. Accessed 18 Sep. 2025.

Medical Definition

undiagnosed

adjective
un·​di·​ag·​nosed -ˈnōst How to pronounce undiagnosed (audio)
: not diagnosed : eluding diagnosis
undiagnosed disease
Last Updated: - Updated example sentences
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