Nun, a female ascetic who chooses to voluntarily leave the world and live her life in prayer and contemplation in a monastery or convent;
in the Bible , Nun is the name of the father of Joshua, the right-hand man and successor of Moses .
in Egyptian Mythology , an alternate spelling for Nu, the name by which ancient Egyptians called both the mysterious underworld from where life was renewed and the primordeal god residing there (the name translates as "Abyss");