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.
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 Many observers were perplexed that an eighty-two-year-old man with virtually unlimited access to medical care—and about whose health there has been virtually unlimited conjecture—could have gone undiagnosed until the cancer threatened his life. Dhruv Khullar, New Yorker, 22 May 2025 What This Means For You Type 5 diabetes is now officially recognized as a distinct form of the disease, and experts believe some cases in the U.S. may have gone undiagnosed. Fran Kritz, Verywell Health, 13 May 2025 The unusually high severity of this year's wave also suggests many mild cases of spread are going undiagnosed. Faris Tanyos, CBS News, 2 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

Browse Nearby Words

Cite this Entry

“Undiagnosed.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undiagnosed. Accessed 4 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
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!