# Fat Interface

> An interface bundling many unrelated operations, forcing clients to depend on methods they never call.

Record: `lexicon:fat-interface`
Kind: anti-pattern
Layer: [Structural Core](https://banes-lab.com/records/layer/structural-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-fat-interface

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Concrete Dependency](https://banes-lab.com/records/lexicon/concrete-dependency.md) and before [Switch-Based Extension](https://banes-lab.com/records/lexicon/switch-based-extension.md).

## Category

- [SOLID / Object-Oriented Design](https://banes-lab.com/records/lexicon-category/solid-object-oriented-design.md)

## Negated by

- [Interface Segregation Principle](https://banes-lab.com/records/architecture/interface-segregation.md)

## Linked from

- [SOLID / Object-Oriented Design](https://banes-lab.com/ontology/principles/architecture-category-solid-object-oriented-design.md)