# delirium

> English word · Noun · IPA /dɪˈlɪ.ɹi.əm/ · frequency rank #30,391

## Definitions
1. A temporary mental state with a sudden onset, usually reversible, including symptoms of confusion, inability to concentrate, disorientation, anxiety, and sometimes hallucinations. Causes can include dehydration, drug intoxication, and severe infection.
2. Wild, frenzied excitement or ecstasy.

## Etymology
Borrowed from Latin dēlīrium (“derangement, madness”).

## Easily confused with
- **delirious** (https://plainspell.com/en/vs/delirious-vs-delirium)

## Common misspellings (11)
`ddelirium`, `deilrium`, `deliirum`, `delirimu`, `deliriumm`, `delirrium`, `deliruim`, `dellirium`, `delriium`, `dleirium`, `edlirium`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/delirium