Space, in the space syntax approach, is defined as relatedness, and as it is, and might be, created by buildings and cities, and as it is experienced by the people who use them. Thus, space is thought of as an intrinsic aspect of everything human beings do in the sense that moving through space, interacting with other people in space, or even just seeing ambient space from a point in it, rather than the background to objects.
Hillier, B. & Hanson, J. (1984), The Social Logic of Space, Cambridge University Press: Cambridge. pp.1-5.