alternate universe

Noun

 * 1)  A hypothetical world situated in a different dimension of space and time than the real world consisting of the universe known and experienced by human beings.
 * 2)  An imaginary realm, often a variant form of the real world, depicting a different way events could have unfolded or the universe could have functioned.
 * 1)  An imaginary realm, often a variant form of the real world, depicting a different way events could have unfolded or the universe could have functioned.

Translations

 * Portuguese: universo alternativo