The existence that is recognized by most as empirically "real." Also referred to as "material," "physical," or "real" reality.

The space where interactions between virtual and conventional realities take place.

A characteristic of problems that arise in VR due to nearby CR entities. Occurrences like smacking a wall while in VR or not hearing or acknowledging CR company both exhibit proximal reality dissonance.

The most simple abstracted virtual representation of a VR user that can be anthropomorphically inhabited - in the sense that it is capable of presenting some conventional personality trait or bodily relationship of the user via the avatar.

May also apply to any digital representation of a human user, e.g. a PIP hand on a mouse, or a mouse pointer itself.

The ability to interact with controllers, driving some virtual action.