---
title: "definition(named:)"
framework: realitykit
role: symbol
role_heading: Instance Method
platforms: [iOS 27.0+, iPadOS 27.0+, tvOS 27.0+, visionOS 27.0+]
path: "realitykit/shadergraph/nodelibrary/definition(named:)"
---

# definition(named:)

Returns the definition with the given name, or nil if no such definition exists in this library.

## Declaration

```swift
final func definition(named name: String) -> ShaderGraph.NodeDefinition?
```