diagnose
verb
di·ag·nose
ˈdī-ig-ˌnōs 
-ˌnōz,
ˌdī-ig-ˈnōs
-ˈnōz,
-əg-
diagnosed; diagnosing
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
G. Timothy JohnsonPulmonary embolus was diagnosed in two of the actively treated patients …—Richard D. Sautter et al.
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
Maria Cheng2
: to analyze the cause or nature of
The mechanic diagnosed the problem with the engine.
: to identify a disease from its signs and symptoms : to make a diagnosis
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
However, his mental health began to deteriorate, and in 2019 he was diagnosed with chronic anxiety and burnout.
—Julio Cesar Valdera Morales, MSNBC Newsweek, 12 May 2025
Greene was diagnosed with a groin sprain and was placed on the IL two days later.
—C. Trent Rosecrans, New York Times, 12 May 2025
My First Look at Liver Disease: My Dad's Diagnosis
My father was diagnosed with liver cirrhosis after a surgeon saw that his liver was scarred during a gallbladder removal surgery.
—Aroosha Sarrafi, Health, 11 May 2025
Forsythe was diagnosed with colon cancer in 2006 and died from complications of pneumonia on April 1, 2010, at his home in Santa Ynez, Calif.
—Nicole Briese, People.com, 11 May 2025
See All Example Sentences for diagnose
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Julio Cesar Valdera Morales, MSNBC Newsweek, 12 May 2025
Greene was diagnosed with a groin sprain and was placed on the IL two days later.
—C. Trent Rosecrans, New York Times, 12 May 2025
My First Look at Liver Disease: My Dad's Diagnosis
My father was diagnosed with liver cirrhosis after a surgeon saw that his liver was scarred during a gallbladder removal surgery.
—Aroosha Sarrafi, Health, 11 May 2025
Forsythe was diagnosed with colon cancer in 2006 and died from complications of pneumonia on April 1, 2010, at his home in Santa Ynez, Calif.
—Nicole Briese, People.com, 11 May 2025
See All Example Sentences for diagnose
Cite this Entry
“Diagnose.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diagnose. Accessed 17 May. 2025.
Copy CitationKids Definition
diagnose
verb
di·ag·nose
ˈdī-ig-ˌnōs
-ˌnōz
-ˌnōz
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
-ˌnōz
-ˌnōz
ˌdī-ig-ˈ,
-əg-
diagnosed; diagnosing
1
: to recognize (as a disease) by signs and symptoms
2
: to diagnose a disease or condition in
diagnosed the patient
: to make a diagnosis
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