parallel universe

parallel universe (plural parallel universes)

(sciences, science fiction, cosmology) A universe that exists separately alongside another universe, as part of a multiverse.
- 1998 [1997], David Deutsch, The Fabric of Reality, New York: Penguin Books, →ISBN, page 202:
  Subjectively we perceive this as a single, unpredictable or ‘random’ outcome, though from the multiverse point of view all the outcomes have actually happened. This parallel-universe multiplicity is the real reason for the unpredictability of the weather.
The universe of an alternative history.

periphrasis: non-parallelizable universe (mathematically incompatible; without a common superordinate wave function)

universe that exists separately alongside another universe

Arabic: عَالَم مُوَازِي m (ʕālam muwāzī)
Bulgarian: парале́лна вселе́на f (paralélna vseléna)
Catalan: univers paral·lel m
Chinese:
Mandarin: 平行宇宙 (zh) (píngxíng yǔzhòu)
Danish: parallelunivers n, parallelt univers n
Esperanto: paralela universo
Finnish: rinnakkainen maailmankaikkeus, rinnakkaistodellisuus
French: univers parallèle (fr) m
Georgian: პარალელური სამყარო (ṗaraleluri samq̇aro), პარალელური განზომილება (ṗaraleluri ganzomileba)
German: Paralleluniversum (de) n
Greek: παράλληλο σύμπαν n (parállilo sýmpan)
Hungarian: párhuzamos univerzum
Japanese: 平行宇宙 (heikō uchū)
Portuguese: universo paralelo m
Spanish: universo paralelo m, universo alterno m
Turkish: paralel evren

English