# bar (structure)

a long piece of material that is a boundary

- Computed level: L10 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: common  ·  Arena: lexicon

## Emergence
**Emerges from:** [piece](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-piece.portion), [material](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-material.physical), [boundary](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-boundary.limit), [long](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-long.size), [form](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-form.shape)

**Through:** The material takes a long, narrow form to serve as a boundary.

**Novel properties:**
- linear dimension
- structural continuity
- demarcating shape

## Examples
- The Golden Gate Bridge has steel suspension cables that stretch 2.7 kilometers across the strait, forming a boundary between landmasses. *(engineering)*
- Antarctic ice shelves calve off when meltwater rivers form long bars of liquid that fracture the ice sheet's edge. *(geophysics)*
- A velvet rope at the Louvre Museum entrance marks a winding path, separating visitors from the Mona Lisa. *(institutions)*

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