Virtual reality is also called "virtual realities", "immersive multimedia", "artificial reality" or "computer-simulated reality". A dictionary definition for "cyberspace" states that this word is a synonym for "virtual reality".
Virtual reality shares some elements with "augmented reality" (or AR). AR is a type of virtual reality technology that blends what the user sees in their real surroundings with digital content generated by computer software. The additional software-generated images with the virtual scene typically enhance way the real surroundings look in some way. Some AR systems use a camera to capture the user's surroundings or some type of display screen which the user looks at (e.g., Microsoft’s HoloLens, Magic Leap).
Room scale experiences are those in which 360-degree tracking allows the user to move about a room-sized space in three dimensions, with their movements accurately reflected in the virtual environment.