Source : WordNet®

haj
     n : the fifth pillar of Islam is a pilgrimage to Mecca during
         the month of Dhu al-Qadah; at least once in a lifetime a
         Muslim is expected to make a religious journey to Mecca
         and the Kaaba; "for a Muslim the hajj is the ultimate act
         of worship" [syn: {hajj}, {hadj}]