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n. A memory location that is *far* away from where the program counter should be pointing, often inaccessible because it is not even mapped in.

"Another core dump -- looks like the program jumped off to hyperspace somehow."

Compare jump off into never-never land.

This usage is from the SF notion of a spaceship jumping 'into hyperspace', that is, taking a shortcut through higher-dimensional space -- in other words, bypassing this universe. The variant 'east hyperspace' is recorded among CMU and Bliss hackers.