Definitions
1.NounIn special relativity, the pattern describing the temporal evolution of a flash of light in Minkowski spacetime. This is modeled in 3-space using the two horizontal axes as spatial dimensions, while the vertical axis is time.
2.NounA (realized or imagined) data visualization of possible sets of future outcomes that is analogous to such a cone.
3.NounUsed other than figuratively or idiomatically: see light, cone.