To create a neologism.
To ghostwrite.
To copy a file or hard drive image.
To provide the speaking or singing voice for another actor, who is lip-syncing.
To forcibly disconnect an IRC user who is using one's reserved nickname.
To gray out (a visual item) to indicate that it is unavailable.
To perform an act of ghosting: to break up with someone without warning or explanation; to ignore someone, especially on social media.
To kill.
To imbue with a ghost-like hue or effect.
To sail seemingly without wind.
To appear or move without warning, quickly and quietly; to slip.
To transfer (a prisoner) to another prison without the prior knowledge of other inmates.
A formerly nonexistent character that was at some point mistakenly encoded into a character set standard, which might have since become used opportunistically for some genuine purpose.
Remnant; the remains of a(n).
Perceived or listed but not real.
Abandoned.
A covert (and deniable) agent.
Transparent or translucent.
An unwanted image similar to and overlapping or adjacent to the main one on a television screen, caused by the transmitted image being received both directly and via reflection.
Of cryptid, supernatural or extraterrestrial nature.
White or pale.
A game in which players take turns to add a letter to a possible word, trying not to complete a word.
Substitute.
A dead person whose identity is stolen by another. See ghosting.
A nonexistent person invented to obtain some fraudulent benefit.
An understudy.
The disembodied soul; the soul or spirit of a deceased person; a spirit appearing after death.
Someone whose identity cannot be established because there are no records of him/her.
An image of a file or hard disk.
Any faint shadowy semblance; an unsubstantial image.
A false image formed in a telescope, camera, or other optical device by reflection from the surfaces of one or more lenses.
The faint image that remains after an attempt to remove graffiti.
An opponent in a racing game that follows a previously recorded route, allowing players to compete against previous best times.
An unresponsive user on IRC, resulting from the user's client disconnecting without notifying the server.
A ghostwriter.
An unphysical state in a gauge theory.