A vanishing point is a point on the image plane of a perspective rendering where the two-dimensional perspective projections of mutually parallel lines in three-dimensional space appear to converge. It is a location where two parallel lines appear to intersect as they move apart, and it is a boundary that neither the human eye nor a camera can see past. The vanishing point is a fundamental concept in the science of perspective, and it is the point at which all receding parallel lines meet.

In art, the vanishing point is the spot on the horizon line to which the receding parallel lines diminish in a linear perspective drawing. In architecture, by placing a single dot at the desired spot on the horizon line, an architect, designer, or artist can create a vanishing point, where all parallel lines appear to move towards the convergence point, which might be anywhere on the horizon line. The position of the vanishing point can be changed, and changing the position of these points will create different results because it is a point of convergence.

In summary, a vanishing point is a point on the image plane of a perspective rendering where parallel lines appear to converge, and it is a fundamental concept in the science of perspective. It is used in art and architecture to create the illusion of depth and distance.