undock

verb4

1. •
   To remove (a ship) from a dock.
2. •
   To depart a spaceship from a dock/berth/mount/mooring under its own power
3. •
   To remove from a docking station.

   • After I undock my laptop, I can run it for about six hours on battery power.
4. •
   To drag (a user interface element, such as a toolbar) away from its fixed position so that it floats freely.