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Words related to space-time

space-time
S s

  • dimension

    Mathematics. a property of space; extension in a given direction: A straight line has one dimension, a parallelogram has two dimensions, and a parallelepiped has three dimensions. the generalization of this property to spaces with curvilinear extension, as the surface of a sphere. the generalization of this property to vector spaces and to Hilbert space. the generalization of this property to fractals, which can have dimensions that are noninteger real numbers. extension in time: Space-time has three dimensions of space and one of time.

  • fourth dimension

    Physics, Mathematics. a dimension in addition to length, width, and depth, used so as to be able to employ geometrical language in discussing phenomena that depend on four variables: Time is considered a fourth dimension for locating points in space-time.

  • spatiotemporal

    pertaining to space-time.

  • world point

    (in relativity) a point in space-time, specified by three space coordinates and a time coordinate. Compare event (def 4).

  • worldline

    Alternative spelling of world line.
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