# unit (measurement)

one thing with size

- Computed level: L5 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: everyday  ·  Arena: (general)

## Emergence
**Emerges from:** [single](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-single.quantity), [size](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-size.measurement)

**Through:** The single and the size together form a thing

**Novel properties:**
- standard amount
- identifiable piece

## Examples
- The International Prototype of the Kilogram, a platinum-iridium cylinder in Paris, defined mass for 130 years. *(physics)*
- The U.S. customary system defines a foot as exactly 0.3048 meters since 1959. *(engineering)*
- The daily market price of Bitcoin fluctuates, but each unit represents one cryptocurrency token on the blockchain. *(economics)*

## Used by
- [meters](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-meters.measurement) (L15)
- [speed](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-speed.motion) (L6)

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