Definitions for undockʌnˈdɒk
Random House Webster's College Dictionary
to uncouple (two spacecraft modules or a spacecraft and space station).
(v.i.)(of a spacecraft module or spacecraft) to uncouple.
Origin of undock:
move out of a dock
"We docked at noon"
take (a ship) out of a dock
"undock the ship"
To remove a ship from a dock.
To remove from a docking station.
To drag a user interface element (such as a toolbar) away from its fixed position so that it floats freely.
to take out of dock; as, to undock a ship