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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.
Willow was later found to have had an undiagnosed heart condition. Alice Gibbs, MSNBC Newsweek, 21 Nov. 2025 These common conditions often go undiagnosed, but effective treatments are available. Katia Hetter, CNN Money, 20 Nov. 2025 His parents encouraged him to study pharmacology, but his resistance to dissecting a frog in one of his science classes, combined with undiagnosed dyslexia, led him to drop out. Hilton Als, New Yorker, 10 Nov. 2025 One unexpected finding, according to Banks, has been the prevalence of undiagnosed sleep apnea among participants. Barbara Bry, San Diego Union-Tribune, 26 Oct. 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 29 Nov. 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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