並へい行こう世せ界かい

noun

parallel world; parallel universe

Used in science fiction, fantasy, and theoretical physics to refer to a world or universe existing alongside our own. Often interchangeable with パラレルワールド.

See also: パラレルワールド

• その小しょう説せつでは、主しゅ人じん公こうが並へい行こう世せ界かいに迷まよい込こむ。

  In that novel, the protagonist wanders into a parallel world.

• 並へい行こう世せ界かいの存そん在ざいを信しんじる科か学がく者しゃもいる。

  Some scientists believe in the existence of parallel universes.