The four-dimensional coordinate system (3 dimensions of space and 1 of time) in which physical events are located(noun)
WordNet. Princeton University. 2010.
Use "space-time continuum" in a sentence
"The U.S.S. Enterprise, along with the Klingon battle cruiser Klothos, had barely succeeded in escaping from the mysterious triangle and the equally peculiar rift in the space-time continuum it was now known to harbor."
"Their freedom from the normal confines of the space-time continuum is thought to be the result of a weird electricity, an intelligent, creative, playful, and unpredictable interaction among oppositely charged entities in motion."