A ghostly double of a living person, especially one that haunts such a person.
An evil twin.
A monster that takes the forms of people, usually after killing them.
A remarkably similar double.
A form of identity theft in which someone steals the identity, and sometimes even the role within society, of a specific dead person (the "ghost") who is not widely known to be deceased.
Ghost imaging.
The practice of hiding prisoners from inspection from (possibly hostile) outside inspectors.
The blurry appearance of a television picture resulting from interference caused by multipath reception.
A problem with a keyboard where certain simultaneous keypresses trigger the action of a further key that was not in fact pressed.
A method of ending a personal relationship by stopping any contact with the other party and not providing an explanation.
The phenomenon of the writing on one side of a page in a notebook being partly visible on the other side.