Definition of looking-glass world in English:

looking-glass world

noun

  • An imaginary place conceived of as being visible in the image shown in a looking-glass, especially one in which the principles which underpin the real world (as the rules of logic, the laws of physics, etc.) operate differently, or in reverse; also in extended use.

Origin

Late 19th century; earliest use found in ‘Lewis Carroll’ (1832–1898), author, mathematician, and photographer (real name Charles Lutwidge Dodgson).