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.
Lily's been fighting an undiagnosed bone marrow condition, but her mom says the music brought light to a tough journey. Bryan West, Nashville Tennessean, 23 Oct. 2025 Lichtman previously said Mascia was suffering from an undiagnosed mental health problem at the time of the shooting and that the former trooper has been undergoing treatment. Landon Mion, FOXNews.com, 23 Oct. 2025 The 83-year-old man’s family believes Theo is suffering from the beginning stages of undiagnosed dementia, according to WTVR. Sam Gillette, PEOPLE, 17 Oct. 2025 Halsey continued by saying a lot of people who are bipolar remain undiagnosed because of these misunderstandings. Mackenzie Cummings-Grady, Billboard, 16 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 Oct. 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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