A specialization of both spatial thing and intangible individual object (qq.v.) whose instances are regions of space that exclusively act as possible locations for other spatial objects, and thus are immobile. A space region might be three-, two-, one-, or zero-dimensional; and spatial objects occupy such regions accordingly. Three-dimensional space regions (see chunk of space) can be occupied by solid objects. Two-dimensional space regions (or Surfaces) can be occupied by a purely two-dimensional objects. And similarly for one-dimensional space regions (Lines) and zero-dimensional space regions (Points).

Another important specialization of spatial region is region of space, whose instances are pieces of the embedding space for spatio-temporal objects (see localized spatial thing).

For more on spatial location and occupancy, see absolute locational predicate and its instances.