Definitions for "hyperspace"
A mathematical space having more than three dimensions. It is a mathematical construct and is not intended to represent the structure of the common physical space in which matter exists.
Multidimensional space beyond the three dimensions that we can easily represent.
A dimension accessible from Earth whose physical laws differ from Earth's in the following ways. First, it is possible to surpass the speed of light within hyperspace. Second, hyperspace is "warped" in comparison to Earth's dimension so that the distance between two points in hyperspace might be immensely shorter than the distance between the equivalent points in Earth's dimension. Interstellar travel is impractical for any sentient race that has not discovered the means of traveling through hyperspace in order to reach a destination in their own dimension. Hyperspace is also known as sub-space (which is sometimes confused with the Negative Zone) and warp-space. It is accessible through naturally occurring or artificially created nexuses in space called space warps.
Hyperspace refers to the total number of individual locations and all of their interconnections in a hypertext environment. It also connotes a perceived sense of this potentially confusing totality. Hyperspace can be considered the hypertextual or architectural aspect of cyberspace, a term that has even richer connotations.
Popularized in Asteroids (1980), causes you ship to disappear and reappear in a random location. Useful to escape dangerous situations, but can sometimes put you in a far worse predicament. Death on re-entry is also possible.