# sleep (biological)

a state where a body is still and off, and persists through time with less change

- Computed level: L11 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: everyday  ·  Arena: everyday

## Emergence
**Emerges from:** [still](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-still.quiet), [off](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-off.state), [persist](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-persist.continue), [body](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-body.physical), [change](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-change.process), [state](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-state.condition), [time](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-time.dimension)

**Through:** still.quiet and off.state together allow persist.continue to occur across time.dimension, reducing change.process within a body.physical

**Novel properties:**
- reduced change over time
- bodily stillness and disengagement
- persistence of condition without activity

## Examples
- A hibernating bear in Alaska remains motionless in its den for five months, breathing slowly and not eating. *(biology)*
- The Voyager 1 probe, powered down since 2023, drifts through interstellar space in silent non-operation. *(engineering)*
- During the 2020 pandemic, sleep studies tracked New Yorkers averaging 6.8 hours nightly in locked-down apartments. *(everyday life)*

## Used by
- [bed](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-bed.furniture) (L17)

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*Canonical: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-sleep.biological*  
*Structured data: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-sleep.biological.json*  
*Every definition provably resolves to space, time, energy and pattern.*