# Def Property

## Overloads

| [Def](https://help.qlik.com/en-US/sense-developer/November2024/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxLibraryMeasureDef.Def.htm#Qlik_Engine_NxLibraryMeasureDef_Def) |  | Definition of the measure.<br><br>JSON property name: qDef |
| --- | --- | --- |

[](https://help.qlik.com/en-US/sense-developer/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxLibraryMeasureDef.Def.htm) [](https://help.qlik.com/en-US/sense-developer/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxLibraryMeasureDef.Def.htm)

## Def

Definition of the measure.

JSON property name: qDef

### Declaration

```

          public string Def { get; set; }
    
  
```

### Property Value

| Type | Description |
| --- | --- |
| System.String |  |

### Implements

[INxLibraryMeasureDef.Def](https://help.qlik.com/en-US/sense-developer/November2024/Subsystems/NetSDKAPIref/Content/Qlik.Engine.INxLibraryMeasureDef.Def.htm#Qlik_Engine_INxLibraryMeasureDef_Def)