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.
Khan said developmental delays often go undiagnosed before the age of 5, meaning many children go without needed services. Emilia Otte, Hartford Courant, 30 May 2025 The result is that many clinicians put off addressing chronic kidney disease until symptoms emerge or test results worsen, often leaving early-stage patients undiagnosed and poorly informed about the disease. Eleanor Rivera, The Conversation, 28 Mar. 2025 Notably, the study suggested that almost 40 percent of adult vitiligo cases might be undiagnosed. Mark Davis, Newsweek, 14 Mar. 2025 Notably, the study also indicates that around 40 percent of adult vitiligo cases in the U.S. may go undiagnosed. Lucy Notarantonio, MSNBC Newsweek, 22 May 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 10 Jun. 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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