# domain (area)

a region that is a bounded part of space

- Computed level: L7 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: domain  ·  Arena: lexicon

## Emergence
**Emerges from:** [region](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-region.spatial), [boundary](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-boundary.limit), [part](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-part.relation), [space](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-space.extent)

**Through:** region together with a boundary defines a bounded part of space

**Novel properties:**
- bounded extent
- spatial enclosure
- interiority

## Examples
- The event horizon of a black hole defines a domain where escape velocity exceeds the speed of light. *(physics)*
- The Great Barrier Reef occupies a marine domain spanning over 2,300 kilometers along Australia's Queensland coast. *(biology)*
- The Schengen Area functions as a domain of free movement across 26 European countries with no internal border checks. *(institutions)*

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