Abstract
In the article the author discusses fundamental definitions as “Physical reality”, “physical systems” and “space”.
The author offers own parameters, original definition of physical system and describes the parameters that characterizes it. Describing the space, the author proposes the concept according to which space – time is considered as the physical system that consists of physical substrate and presents itself as an “absolute physical reality”. For the first time the author suggests a concept of “differentiating physical reality” as a physical system that differs from its “super system”