Definition of DIAGNOSIS (original) (raw)

1

a

: the art or act of identifying a disease from its signs and symptoms

b

: the decision reached by 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

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Seeking an autism diagnosis for a child can take a long time. —Evan Bush, NBC News, 6 Feb. 2025 Still wanted to blame family members for his diagnosis that came so late in his life, like his late mother. —Pj Green, Kansas City Star, 5 Feb. 2025 His wife Emma Heming Willis later confirmed his diagnosis with frontotemporal dementia in February 2023. —Escher Walcott, People.com, 4 Feb. 2025 Willis and Demi Moore’s eldest daughter, Rumer, gave an update on her father since his frontotemporal dementia diagnosis was announced nearly three years ago. —Stephanie Giang-Paunon, Fox News, 4 Feb. 2025 See all Example Sentences for diagnosis

Word History

Etymology

New Latin, from Greek diagnōsis, from diagignōskein to distinguish, from dia- + gignōskein to know — more at know

First Known Use

1634, in the meaning defined at sense 1a

Time Traveler

The first known use of diagnosis was in 1634

Dictionary Entries Near diagnosis

Cite this Entry

“Diagnosis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diagnosis. Accessed 12 Feb. 2025.

Share

More from Merriam-Webster on diagnosis

Last Updated: 9 Feb 2025 - Updated example sentences

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

Merriam-Webster unabridged