1. A ghost image is a permanent discoloration in a certain area on an electronic display; more specifically, those which use cathode ray tubes. This issue is caused by an uneven usage of pixels; more plainly, it can occur when a still image (such as a news logo) is left on the screen for an inordinate amount of time. With LCD monitors, this effect is known as burn-in.

2. A description of a person who has gone offline, yet appears as though they are still logged into chat or another service. Often when this occurs, the user will receive an error indicating they are already logged in upon attempting to rejoin, forcing them to wait for their account time out.

3. Ghosting is a form of cheating in online games where players that have died tell other players that are still alive where other players in the game are.

4. When describing an LCD or flat-panel display, ghosting is used to describe an artifact caused by a slow response time. As the screen refreshes, the human eye still perceives the image previously displayed; causing a smearing or blurring visual effect.

5. When using Norton's Ghost, ghosting is the method of copying the complete hard drive contents to a CD or network drive. Once ghosted, this image can be distributed over several computers.

This is commonly done in a corporate environment where the same operating system and corporate software needs to be installed on dozens of different computers.

Also see: Burn in, Chat terms, Game terms, Video terms