# diagnoses

/ˌdaɪəɡˈnoʊsiz/ (US) · CEFR C1 · Noun

Source: https://englishreference.com/word/diagnoses
Updated: 2026-05-07

## Definition

the plural form of diagnosis. It refers to more than one expert opinion about the cause of an illness or a problem.

For teachers: the plural form of 'diagnosis'; refers to the identification of the nature of an illness or other problem by examination of the symptoms.

## Examples

- The doctors gave two different diagnoses for his back pain.
- After reviewing the test results, the specialist confirmed that the previous diagnoses were incorrect.
- The complexity of the patient's symptoms led to several conflicting diagnoses before a rare genetic condition was finally identified by the research team.

## Pitfalls

- Not "The diagnoses is clear." but "The diagnoses are clear." — Diagnoses is the plural form and requires a plural verb.

## Usage notes

- The plural of 'diagnosis'. It follows the Greek-style pluralisation where the '-is' ending changes to '-es'.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.