Can you georeference a CAD drawing?
Georeferencing is the process of spatially adjusting a CAD drawing without actually changing the original source data. In ArcGIS for Desktop this is performed by registering arbitrary points in the CAD drawing to known geographic coordinates.
How do I know if my DWG is georeferenced?
You can tell if your CAD drawing was georeferenced if it has an accompanying world file. This world file tells the GIS to display your CAD in the correct place. The world file will have the same file name as your CAD drawing but with a . wld extension.