# encephalitis

/ɛnˌsɛfəˈɫaɪtəs/ (US) · /ɛnsˌɛfɐlˈaɪtɪs/ (UK) · CEFR C1 · Noun

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

## Definition

a medical condition where the brain becomes swollen and inflamed. It is usually caused by a virus and can make a person very sick.

For teachers: inflammation of the brain tissue, typically resulting from a viral infection. It is a serious neurological condition that can lead to significant cognitive or physical impairment.

## Examples

- The doctor tested him for encephalitis after his high fever.
- Vaccines for diseases like measles and chickenpox have significantly reduced the incidence of viral encephalitis in children.
- While some cases of encephalitis resolve with rest and hydration, others require intensive care and antiviral treatment to prevent permanent neurological damage or cognitive decline.

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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.