A vision is something seen in a dream, trance, or religious ecstasy, especially a supernatural appearance that usually conveys a revelation. Visions generally have more clarity than dreams, but traditionally fewer psychological connotations. Visions are known to emerge from spiritual traditions and could provide a lens into human nature and reality.Prophecy is often associated with visions.
In simple words, it is a religious experience in which the experience can be seen and hence it is called a vision.
Visions are listed in approximately chronological order whenever possible, although some dates may be in dispute.