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Universe vs Spacetime - What's the difference?

universe | spacetime |

As nouns the difference between universe and spacetime

is that universe is the sum of everything that exists in the cosmos, including time and space itself; same as the universe while spacetime is (uncountable|physics) the four-dimensional continuum of the three spatial dimensions plus time.

universe

English

Alternative forms

* Universe (dated or religious)

Noun

(en noun)
  • The sum of everything that exists in the cosmos, including time and space itself; same as the Universe.
    • I think that the universe was created by a life force rather than a deity .
  • An entity similar to our Universe; one component of a larger entity known as the multiverse.
  • Everything under consideration.
    • In all this universe of possibilities, there is only one feasible option.
  • An imaginary collection of worlds.
    • The universe in this comic book series is richly imagined.
  • Intense form of world in the sense of perspective or social setting.
    • That didn’t just rock my world, it rocked my universe .

    Derived terms

    * clockwork universe * known universe * observable universe * parallel universe * physical universe * universe of discourse

    Related terms

    * universal * universal set * university

    See also

    * om * (disambig) * (projectlink) * * ----

    spacetime

    English

    (wikipedia spacetime)

    Noun

  • (uncountable, physics) The four-dimensional continuum of the three spatial dimensions plus time.
    • An event is a point in spacetime , specified by the coordinates x,y,z and t.
  • (physics) An n''-dimensional continuum consisting of dimensions of both space & time. Normally spacetime is considered as having 4 dimensions (''x'', ''y'', ''z'', ''t ), but higher-dimensional spacetimes are often encountered in theoretical physics, e.g. the 5-dimensional spacetime of Kaluza-Klein theory or the 11 dimensions of spacetime in M-theory.
  • (relativity) A specific region of the universe with mathematically different properties than the surrounding spacetime. Synonymous with "metric" within the context of general relativity.
    • "a Schwarzschild spacetime," "a Reissner-Nordström spacetime," etc. as opposed to sense (2) describing the universe's spacetime as a whole: "a Minkowski spacetime," "a 5-dimensional spacetime," etc.

    Anagrams

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