---
title: definition
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/animationresource/definition
---

# definition

The timeframe, target object, and visual semantics of the animation.

## Declaration

```swift
@MainActor @preconcurrency var definition: any AnimationDefinition { get }
```

## See Also

### Inspecting animation information

- [name](realitykit/animationresource/name.md)
- [AnimationFillMode](realitykit/animationfillmode.md)