Distributedness means the properties purely generated by the arrangement of a number of equal, individual cells rather than, for example, by the superimposition of a single superordinate cell on those cells.
Hillier, B. & Hanson, J. (1984), The Social Logic of Space, Cambridge University Press: Cambridge. pp.11-12.
Hillier, B., Leaman, A., Stansall, P., Bedford, M., (1976) Space Syntax. Envrionment and Planning B, vol (3), 147-185. pp.180-1.