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noun

diagnosis

/ˌdaɪ.əɡˈnoʊ.sɪs/  ·  say it: dy·uh·AHG·noh·sis

identifying a disease from its signs and symptoms

In Medicine & Health

In more detail

1. (noun) the identification of a disease or condition by examining symptoms and medical tests

2. (noun) a statement or conclusion about what someone's problem is

Examples

How to use diagnosis

Diagnosis is used in medical contexts to describe identifying a disease through examination and testing, but it extends metaphorically to any systematic identification of a problem or issue. It is more formal and technical than simple 'identification' and implies a careful, expert assessment based on evidence rather than mere observation.

Common phrases

Synonyms

identification · determination · assessment · conclusion · evaluation

Word family

diagnose (verb) · diagnostic (adjective) · diagnostics (noun) · diagnostician (noun)

A common mistake

Learners sometimes confuse diagnosis (the identification of the problem) with treatment or cure (the solution), or misspell it as 'diagnoses' in singular contexts; note that diagnoses is the plural form.

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