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ghost

• Noun

  1. The spirit; the human soul.
  2. The disembodied soul; the soul or spirit of a deceased person; a spirit appearing after death.
  3. Any faint shadowy semblance; an unsubstantial image.
  4. A false image formed in a telescope, camera, or other optical device by reflection from the surfaces of one or more lenses.
  5. 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.
  6. A ghostwriter.
  7. A nonexistent person invented to obtain some (typically fraudulent) benefit.
  8. A dead person whose identity is stolen by another. See ghosting.
  9. An unresponsive user on IRC, resulting from the user's client disconnecting without notifying the server.
  10. An image of a file or hard disk.
  11. An understudy.
  12. A covert (and deniable) agent.
  13. The faint image that remains after an attempt to remove graffiti.
  14. An opponent in a racing game that follows a previously recorded route, allowing players to compete against previous best times.
  15. Someone whose identity cannot be established because there are no records of him/her.
  16. An unphysical state in a gauge theory.
  17. 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.
  18. Clipping of ghost pepper.
  19. A game in which players take turns to add a letter to a possible word, trying not to complete a word.
  20. White or pale.
  21. Transparent or translucent.
  22. Abandoned.
  23. Remnant; the remains of a(n).
  24. Perceived or listed but not real.
  25. Of cryptid, supernatural or extraterrestrial nature.
  26. Substitute.

• Verb