Perhaps Cuil can best be defined by the levels of abstract action, i.e. 1 Cuil is the equivalent of one level of perceived reality in complex and dynamic relationship with abstract elements of one other intangible reality. Furthermore, an "n-Cuil" world would exist with one level of perceived reality with "n" intangible explications of reality; not existing as separate entities within the reality, but rather as integrations of each other in the whole.
Just some thoughts…