diagnose

verb

di·​ag·​nose ˈdī-ig-ˌnōs How to pronounce diagnose (audio)
-ˌnōz,
ˌdī-ig-ˈnōs How to pronounce diagnose (audio)
-ˈnōz,
-əg-
diagnosed; diagnosing

transitive verb

1
a
: to recognize (something, such as a disease) by signs and symptoms
The other method of diagnosing gallstones is through an ultrasound examination, which has the advantages of being simple, safe and quick.G. Timothy Johnson
Pulmonary embolus was diagnosed in two of the actively treated patients …Richard D. Sautter et al.
b
: to recognize a disease or condition in
The physicist and cosmologist was diagnosed with Lou Gehrig's disease when he was a 21-year-old student at Cambridge University.Maria Cheng
2
: to analyze the cause or nature of
The mechanic diagnosed the problem with the engine.

intransitive verb

: to identify a disease from its signs and symptoms : to make a diagnosis
diagnosable adjective
or diagnoseable

Examples of diagnose in a Sentence

The test is used to help in diagnosing heart disease. Thousands of new cases have been diagnosed in the past year. The doctor was unable to diagnose the skin condition. a new doctor with little experience diagnosing patients The mechanic was unable to diagnose the problem.
Recent Examples on the Web Ceremonies with mushrooms, LSD, ayahuasca and toad Former US rugby player Anna Symonds says she was diagnosed with TBI about 10 years ago and has to take several different hormones that her body – notably her pituitary gland – is not making as a result of the head injuries. Amy Woodyatt, CNN, 19 Feb. 2024 In December 2021, days before Balfour’s three-decade sentence ended, she was diagnosed with breast cancer. Daniel Wu, Washington Post, 19 Feb. 2024 Inside the plan to diagnose Alzheimer’s in people with no memory problems — and who stands to benefit. Gazans in Rafah watch Israeli bombs move closer with nowhere left to run. Kevinisha Walker, Los Angeles Times, 17 Feb. 2024 It’s been another difficult year for William’s family, with his father King Charles III diagnosed with cancer last month. K.j. Yossman, Variety, 16 Feb. 2024 What to Expect With the A1C Test Fasting Plasma Glucose Test A second blood test used to diagnose prediabetes is a fasting plasma glucose (FPG) test. Danielle Weiss, Verywell Health, 16 Feb. 2024 Things just haven’t been the same since the second-year center got diagnosed with a contusion following successive hits to the lower back in November, creating a situation that has taken longer than anticipated. Roderick Boone, Charlotte Observer, 15 Feb. 2024 Many people who are infected will have seen their doctors during that window where testing is ineffective and will have been diagnosed based on their symptoms and the telltale rash. Helen Branswell, STAT, 15 Feb. 2024 About half of people diagnosed with Long COVID have symptom profiles that also fit ME/CFS. Claire Maldarelli, Popular Science, 14 Feb. 2024 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'diagnose.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

back-formation from diagnosis

First Known Use

circa 1841, in the meaning defined at transitive sense 1a

Time Traveler
The first known use of diagnose was circa 1841

Dictionary Entries Near diagnose

Cite this Entry

“Diagnose.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diagnose. Accessed 1 Mar. 2024.

Kids Definition

diagnose

verb
di·​ag·​nose ˈdī-ig-ˌnōs How to pronounce diagnose (audio) -ˌnōz How to pronounce diagnose (audio)
ˌdī-ig-ˈnōs,
-ˈnōz
diagnosed; diagnosing
: to recognize by signs and symptoms : make a diagnosis
diagnose a disease
diagnose a play in football

Medical Definition

diagnose

verb
di·​ag·​nose ˈdī-ig-ˌnōs How to pronounce diagnose (audio) -ˌnōz How to pronounce diagnose (audio)
ˌdī-ig-ˈ,
-əg-
diagnosed; diagnosing

transitive verb

1
: to recognize (as a disease) by signs and symptoms
2
: to diagnose a disease or condition in
diagnosed the patient
diagnosable adjective
Last Updated: - Updated example sentences
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