# interaction (process)

When two things change each other.

- Computed level: L2 (depth in the emergence graph, not abstraction)
- Status: published  ·  Domain: physics  ·  Arena: E1

## Emergence
**Emerges from:** [change](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-change.process), [energy](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-energy.capacity)

**Through:** Energy passes between two things so that each changes the other.

**Novel properties:**
- mutual causation
- coupling

## Examples
- Two billiard balls collide on a pool table, each altering the other's speed and direction. *(physics)*
- Bees and flowers exchange pollen and nectar, each transforming the other's biological state. *(biology)*
- Bitcoin nodes update their ledgers in response to each other’s transactions, reshaping the network’s state. *(computing)*

## Used by
- [act](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-act.deed) (L3)
- [beauty](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-beauty.aesthetic) (L11)
- [blue](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-blue.color) (L12)
- [brown](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-brown.color) (L13)
- [business](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-business.economic) (L8)
- [cause](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-cause.reason) (L3)
- [chain reaction](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-chain-reaction.stacked) (L17)
- [color](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-color.visual) (L8)
- [community](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-community.social) (L7)
- [connection](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-connection.social) (L9)
- [connects](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-connects.verb) (L7)
- [discussion](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-discussion.social) (L13)
- [establishes](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-establishes.verb) (L5)
- [force](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-force.push) (L12)
- [forum](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-forum.social) (L7)
- [friend](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-friend.social) (L9)
- [going viral](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-going-viral.excess) (L15)
- [greater than the sum](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-greater-than-the-sum.excess) (L10)
- [help](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-help.assistance) (L5)
- [in sync](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-in-sync.harmony) (L8)
- [join](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-join.connection) (L5)
- [learn](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-learn.cognitive) (L7)
- [make](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-make.verb) (L4)
- [meeting](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-meeting.social) (L7)
- [network](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-network.system) (L9)
- [on the ground](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-on-the-ground.local) (L14)
- [on the same wavelength](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-on-the-same-wavelength.resonance) (L11)
- [party](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-party.social) (L7)
- [people](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-people.social) (L6)
- [play](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-play.game) (L12)
- [please](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-please.politeness) (L10)
- [price](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-price.economic) (L8)
- [relation](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-relation.association) (L8)
- [request](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-request.social) (L8)
- [research](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-research.investigation) (L7)
- [response](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-response.behavioral) (L5)
- [ripple effect](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-ripple-effect.stacked) (L12)
- [see](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-see.visual) (L6)
- [self fulfilling prophecy](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-self-fulfilling-prophecy.stacked-dependency) (L15)
- [social](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-social.relational) (L8)

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