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  1. Oxford Dictionary

    closed universe

    • n.
      the condition in which there is sufficient matter in the universe to halt the expansion driven by the Big Bang and cause eventual re-collapse.

    • noun: closed universe

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    closed universe

    • IPA[klōzd ˈyo͞onəvərs]
    • n.
      the condition in which there is sufficient matter in the universe to halt the expansion driven ...

    Oxford American Dictionary