# REM

/ˈɹɛm/ (US) · CEFR B2 · Noun

Source: https://englishreference.com/word/rem
Updated: 2026-05-10

## Definition

Stands for rapid eye movement. A stage of sleep where your eyes move quickly and you have most of your dreams.

For teachers: Abbreviation for rapid eye movement. A recurring sleep phase characterized by rapid eye movements, high brain activity, and muscle paralysis. Typically associated with vivid dreaming.

## Examples

- Most people dream during the REM stage of sleep.
- Alcohol consumption can disrupt your sleep cycle and prevent you from getting enough REM sleep.
- Research suggests that REM sleep plays a critical role in memory consolidation and emotional regulation, as the brain processes the day's events while the body remains largely immobile.

## Usage notes

- Often used as a modifier before 'sleep' or 'cycle'.

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