# undiagnosed

/ənˈdaɪæɡnoʊst/ (US) · /ʌndˌaɪəɡnˈəʊzd/ (UK) · CEFR B2 · Adjective

Source: https://englishreference.com/word/undiagnosed
Updated: 2026-05-26

## Definition

describing a medical condition that has not been identified or recognized by a doctor yet.

For teachers: relating to a medical condition or symptom that has not yet been identified or confirmed by a professional diagnosis.

## Examples

- He lived with undiagnosed diabetes for several years.
- The patient's symptoms were initially dismissed as stress, but they were later found to be signs of an undiagnosed heart condition.
- Many chronic illnesses remain undiagnosed for decades because their symptoms are subtle or mimic more common, less severe health issues.

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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.