Wiktionary
n. (context computing English) The merging of a view of the real-world environment upon a digital image in real time
Wikipedia
Augmented reality (AR) is a live direct or indirect view of a physical, real-world environment whose elements are augmented (or supplemented) by computer-generated sensory input such as sound, video, graphics or GPS data. It is related to a more general concept called mediated reality, in which a view of reality is modified (possibly even diminished rather than augmented) by a computer. As a result, the technology functions by enhancing one’s current perception of reality. By contrast, virtual reality replaces the real world with a simulated one. Augmentation is conventionally in real-time and in semantic context with environmental elements, such as sports scores on TV during a match. With the help of advanced AR technology (e.g. adding computer vision and object recognition) the information about the surrounding real world of the user becomes interactive and digitally manipulable. Information about the environment and its objects is overlaid on the real world. This information can be virtual or real, e.g. seeing other real sensed or measured information such as electromagnetic radio waves overlaid in exact alignment with where they actually are in space.
Usage examples of "augmented reality".
Bender was what it was called by almost everybody, but the true name of the drive which gave men the galaxy was the Scales-Waller Augmented Reality Analog Instigation Construct.
An instant later, he pushed a tiny knob at the hinge of their left stem with his fingertip, and a rectangular augmented reality panel appeared on that side.