noun
subspace; alternate space
Science-fiction term for a space outside normal reality, often with different physical laws. Used in contexts like faster-than-light travel or pocket dimensions.
その宇宙船は亜空間を通ってワープした。
The spaceship warped through subspace.
亜空間に物を収納できる能力を持つ。
He has the ability to store objects in a subspace.
Compound of 亜 (a, 'sub-') and 空間 (kūkan, 'space'), literally 'sub-space'. A modern coinage for science-fiction concepts.