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Noun: spacetime  'speys,tIm
  1. The four-dimensional coordinate system (3 dimensions of space and 1 of time) in which physical events are located
    "Einstein's theory of relativity revolutionized our understanding of spacetime";
    - space-time, space-time continuum

Derived forms: space-times, spacetimes

Type of: coordinate system, frame of reference, reference frame, reference system

Encyclopedia: Spacetime