The idea of how things are arranged in a space, or how things relate to each other in a space.
Spatiality is about how things are put in a place and how they work together there.
Examples:
The spatiality of the room makes it hard to move around.
The spatiality of the city is very interesting.
I like the spatiality of this playground.
The spatiality of the maze made it hard to find the way out.
The spatiality of the universe is a big mystery.
The spatiality of the garden made it easy to find the flowers.