What Exactly Is A 6th Generation Fighter?

What exactly is a 6th Generation Fighter? Fifth-generation fighters are so advanced – and so expensive – models: the United States, Russia, and China. The technology – stealth, supercruise, supermaneuverability, interconnectivity – is still cutting edge. Yet, the great powers are already looking ahead, as great powers tend to do, competing with each other, and contemplating the 6th generation of fighter technology.