Space - space is the volume of ''seemingly empty'' distance that surrounds an observer
Distance - An isotropic unbounded quantity of n-dimensional space extending away from the observer
Length -1. A measured distance of finite bounded space between two light reflective or light emitting point sources.
2. A measurement of an objects physical dimensions of its form.
Universe - an unbounded n-dimensional space
Visual Universe - a finite observed length within a Universe
I had already fixed the definitions which people ignore.