subspacePronunciation: /ˈsʌbspɛɪs/Definition of subspace noun 1 Mathematics a space that is wholly contained in another space, or whose points or elements are all in another space. 2 [mass noun] (in science fiction) a hypothetical space-time continuum used for communication at a speed faster than that of light. subspace in other Oxford dictionaries Definition of subspace in the US English dictionary
