To haunt; to appear to in the form of an apparition.
To die; to expire.
To ghostwrite.
To sail seemingly without wind.
To copy a file or hard drive image.
To gray out (a visual item) to indicate that it is unavailable.
To forcibly disconnect an IRC user who is using one's reserved nickname.
To appear without warning; to move quickly and quietly; to slip.
To kill.
To break up with someone without warning or explanation; to perform an act of ghosting.
(of an article or published opinion) written under the name of another person; ghostwritten