Hadj n.  The pilgrimage to Mecca, performed by Muslims.  It is the duty of Moslems to make a journey to Mecca at least once ina lifetime, or if that is not possible, three journeys to one of the alternate sacred sites. [Also spelled haj and hajj.]
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 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]