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
Synonyms
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
For a multiple myeloma diagnosis, your healthcare provider will take a sample of bone marrow.2
Bone marrow is the soft, spongy tissue in the center of your bones.
—
Carrie Madormo, Rn, Health, 24 Jan. 2025
Sometimes it’s treated as a tragedy, a kind of death sentence—especially a premature menopause diagnosis when pregnancy was suspected instead (Dead to Me, Mr. Plankton).
—Jennifer Vineyard, Flow Space, 24 Jan. 2025
As first-time diagnoses surged among older people, prevalence has remained consistent among children, at around 11 percent in the United States and 5 percent in Britain.
—Ellen Barry, New York Times, 23 Jan. 2025
Through the National Institutes of Health, or NIH, the secretary yields broad power in allocating funding and promoting study of the causes, diagnosis, treatment, control and prevention of diseases.
—Angela Mattie, The Conversation, 23 Jan. 2025
See all Example Sentences for diagnosis 
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Carrie Madormo, Rn, Health, 24 Jan. 2025
Sometimes it’s treated as a tragedy, a kind of death sentence—especially a premature menopause diagnosis when pregnancy was suspected instead (Dead to Me, Mr. Plankton).
—Jennifer Vineyard, Flow Space, 24 Jan. 2025
As first-time diagnoses surged among older people, prevalence has remained consistent among children, at around 11 percent in the United States and 5 percent in Britain.
—Ellen Barry, New York Times, 23 Jan. 2025
Through the National Institutes of Health, or NIH, the secretary yields broad power in allocating funding and promoting study of the causes, diagnosis, treatment, control and prevention of diseases.
—Angela Mattie, The Conversation, 23 Jan. 2025
See all Example Sentences for diagnosis
Articles Related to diagnosis
Dictionary Entries Near diagnosis
Cite this Entry
“Diagnosis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diagnosis. Accessed 28 Jan. 2025.
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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