# extraScriptingDefines

> User-specified preprocessor defines used while compiling assemblies.

## Definition

* **Type:** Property
* **Namespace:** [UnityEditor.Build.Player](/engine/6000.3/script-reference/unityeditor/build/player.md)
* **Assembly:** UnityEditor

```csharp
public string[] extraScriptingDefines { get; set; }
```