The New International Encyclopædia/Hajji
HAJJI, hāj'ĭ, Ar. pron. hä'jḗ (Ar. ḥajjī, pilgrim, from ḥajja, to make a pilgrimage) . An Arabic word, signifying one who has performed the Hajj (q.v.) or pilgrimage to Mecca. It is a title of honor added to a person's name as an indication that this religious duty, obligatory upon every Mohammedan, has been performed.