The Holodeck is a fictional device from the television franchise Star Trek which uses "holograms" (projected light and electromagnetic energy which create the illusion of solid objects) to create a realistic 3D simulation of a real or imaginary setting, in which participants can freely interact with the environment as well as objects and characters, and sometimes a predefined narrative.
In several series, holodecks are an amenity available to the crew of starships. In the series Star Trek: Deep Space Nine, a similar device is referred to as a holosuite, operated by the owner of the space station...