Ra-Hoor-Khuit meaning, in the Book of the Law by Aleister Crowley, is the manifestation of Horus of the Two Horizons. As the son of Isis and Osiris he became the warrior-slayer of Seth (Set) or Typhon, the serpent of the Nile.
It is a god-form within the religious philosophy of Thelema developed by Aleister Crowley in the early 20th century. It is considered to be a manifestation of the god Horus. It is often depicted as a solar deity associated with strength, power, and victory.
In Thelemic ritual and mysticism, Ra-Hoor-Khuit is invoked as a powerful force for achieving one’s True Will, or the individual’s ultimate purpose in life. It is also associated with the tarot card «The Tower» or the number 15. Crowley wrote a poem «Hymn to Ra-Hoor-Khuit» that is often used in Thelemic rituals.
Crowley affirms that Horus in his many forms was the spiritual child of the former mother and father; the act of slaying his father’s murderer is symbolic of destroying the former Aeon in which Christianity ruled and destroyed religions before it.
Therefore Horus would rightly govern the new Aeon as the Crowned and Conquering Child; the Aeon that would put an end to the worshipping of death as Christianity demanded and worship the joining together the spiritual and material in Horus, the Child and the Future. A.G.H
Sutin, Lawrence. Do What Thou Wilt: A Life of Aleister Crowley. New York. St. Martin’s Griffin. 2000. p. 125