diagnosis
noun
di·ag·no·sis
ˌdī-ig-ˈnō-səs 
-əg-
plural diagnoses
ˌdī-ig-ˈnō-ˌsēz
-əg-
1
a
: the art or act of identifying a disease from its signs and symptoms
b
: the decision reached by diagnosis
the doctor's diagnosis
2
a
: investigation or analysis of the cause or nature of a condition, situation, or problem
diagnosis of engine trouble
b
: a statement or conclusion from such an analysis
3
biology
: a concise technical description of a taxon
Examples of diagnosis in a Sentence
The unusual combination of symptoms made accurate diagnosis difficult.
She is an expert in the diagnosis and treatment of eye diseases.
The diagnosis was a mild concussion.
His doctor made an initial diagnosis of pneumonia.
The committee published its diagnosis of the problems affecting urban schools.
Recent Examples on the Web
In the outside world, that diagnosis would trigger urgency.
—
Voice Of The People, New York Daily News, 21 Mar. 2026
The committee dropped the subpoena due to his declining health after learning of his Parkinson’s diagnosis.
—Molly Parks, The Washington Examiner, 21 Mar. 2026
In 2023, the Assembly passed the David Hall Act, recognizing both that patients with an immediately life-threatening diagnosis sometimes need out-of-state specialists and that telehealth can be the difference between life-saving treatment and no meaningful options at all.
—Rees Empey, Oc Register, 21 Mar. 2026
In an August 2025 interview with ABC News' Diane Sawyer, Emma Willis said her husband lost much of his ability to communicate since his diagnosis.
—ABC News, 20 Mar. 2026
See All Example Sentences for diagnosis
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Voice Of The People, New York Daily News, 21 Mar. 2026
The committee dropped the subpoena due to his declining health after learning of his Parkinson’s diagnosis.
—Molly Parks, The Washington Examiner, 21 Mar. 2026
In 2023, the Assembly passed the David Hall Act, recognizing both that patients with an immediately life-threatening diagnosis sometimes need out-of-state specialists and that telehealth can be the difference between life-saving treatment and no meaningful options at all.
—Rees Empey, Oc Register, 21 Mar. 2026
In an August 2025 interview with ABC News' Diane Sawyer, Emma Willis said her husband lost much of his ability to communicate since his diagnosis.
—ABC News, 20 Mar. 2026
See All Example Sentences for diagnosis
Cite this Entry
“Diagnosis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diagnosis. Accessed 24 Mar. 2026.
Copy CitationKids Definition
diagnosis
noun
di·ag·no·sis
ˌdī-ig-ˈnō-səs
plural diagnoses
-ˈnō-ˌsēz
1
a
: the art or act of identifying a disease from its signs and symptoms
b
: the decision reached by diagnosis
2
a
: a careful study of something especially to determine its nature or importance
b
: the conclusion reached after a study or examination
Medical Definition
diagnosis
noun
di·ag·no·sis
ˌdī-ig-ˈnō-səs, -əg-
plural diagnoses
-ˌsēz
1
a
: the art or act of identifying a disease from its signs and symptoms
b
: the decision reached by diagnosis
a diagnosis of pneumonia
2
: a concise technical description of a taxon
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