A disembodied soul; a soul or spirit of a deceased person; a spirit appearing after death. • A spirit; a human soul. • Any faint shadowy semblance; an unsubstantial image. • A false image, for example in a photographic print or negative, or on a television screen or radar display, or in a telescope, caused by poor or double reception or reflection (from a lens or screen). • A faint image that remains after an attempt to remove graffiti. • Ellipsis of ghostwriter. • A nonexistent person invented to obtain some (typically fraudulent) benefit. • A dead person whose identity is stolen by another (see ghosting). • An unresponsive user on IRC, resulting from the user's client disconnecting without notifying the server. • A copy of a file or record. • An understudy. • A covert (and deniable) agent. • An opponent in a racing game that follows a previously recorded route, allowing players to compete against previous best times. • Someone whose identity cannot be established because there are no records of such a person. • An unphysical state in a gauge theory. • 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. • Ellipsis of ghost pepper. • A game in which players take turns to add a letter to a possible word, trying not to complete a word. • White or pale. • Transparent or translucent. • Abandoned. • Remnant; remains. • Perceived or listed but not real. • Of a cryptid, supernatural or extraterrestrial nature. • Substitute.