BORACK, among Mahomedans, a fabulous animal, of the middle kind between an ass and a mule, on which their prophet was supposed to have been carried in his nocturnal flight from Jerusalem to the heavens. This animal the Arabians call Al Borak, that is, shining. The night on which the journey was performed is called Lailat al-Meeraga, or the night of ascension; and the flight itself Al Mesra, or Hejira, concerning which there is a multitude of traditions.