un·di·ag·nosed | \ˌən-ˌdī-ig-ˈnōst, -əg-, -zd\

Definition of undiagnosed 

: 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

On top of that, tests designed to diagnose depression are more effective at determining the mental health status of white people, meaning black people may go undiagnosed and untreated. Serena Sonoma, Teen Vogue, "Study Shows Police Shootings Are Hurting Black People's Mental Health," 11 July 2018 That can mean illnesses that might have been caught early can go undiagnosed, becoming potentially life-threatening and enormously costly for the medical system. John Tozzi, Bloomberg.com, "Sky-High Deductibles Broke the U.S. Health Insurance System," 26 June 2018 That can mean illnesses that might have been caught early can go undiagnosed, becoming potentially life-threatening and enormously costly for the medical system as well as the patient. John Tozzi And Zachary Tracer, latimes.com, "How sky-high deductibles broke the U.S. health insurance system," 26 June 2018 My book, a memoir about growing up with an undiagnosed panic disorder, came out today. Amanda Stern, Health.com, "I Lived With Anxiety So Debilitating It Kept Me From Going Outside—Until I Finally Received a Surprising Diagnosis," 19 June 2018 People of size are less likely to be prescribed certain routine medications (including antibiotics) and more likely to delay or avoid doctor’s appointments, potentially allowing diseases to progress undiagnosed or for warning signs to be missed. Sarah Jacoby, SELF, "The Science on Weight and Health," 26 June 2018 Doctors say there is a high likelihood of other undiagnosed cases of this virus. Caroline Judelson, Fox News, "First case of mosquito-borne Keystone virus found in humans," 21 June 2018 One death occurred because of an undiagnosed ectopic pregnancy. Suzanne Gamboa /, NBC News, "Planned Parenthood cancels abortions in Arkansas after restrictive law is reinstated," 31 May 2018 The undiagnosed condition is an abnormal tangle of blood vessels connecting arteries and veins, which disrupts normal blood flow. Scott Springer, Cincinnati.com, "Ladonnis Griffin's biggest play ever at Lakota West was a GoFundMe page," 12 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'undiagnosed.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of undiagnosed

1864, in the meaning defined above

Keep scrolling for more

Learn More about undiagnosed

Share undiagnosed

Statistics for undiagnosed

Look-up Popularity

Time Traveler for undiagnosed

The first known use of undiagnosed was in 1864

See more words from the same year

Keep scrolling for more

More Definitions for undiagnosed


un·di·ag·nosed | \-ˈnōst \

Medical Definition of undiagnosed 

: not diagnosed : eluding diagnosis undiagnosed disease

Comments on undiagnosed

What made you want to look up undiagnosed? Please tell us where you read or heard it (including the quote, if possible).


exaggeratedly or childishly emotional

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

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