Reality-virtuality continuum

Definition
The reality–virtuality continuum is a continuous scale ranging between the completely virtual, a virtuality, and the completely real, reality. The reality-virtuality continuum encompasses all possible variations and compositions of real and virtual objects.

The area between the two extremes, where both the real and the virtual are mixed, is the so-called mixed reality. This in turn is said to consist of both augmented reality, where the virtual augments the real, and augmented virtuality, where the real augments the virtual.