the GNU version of the Collaborative International Dictionary of English
n. The pilgrimage to Mecca, performed by Mohammedans. 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.
The Century Dictionary and Cyclopedia
n. The pilgrimage to Mecca which every free Mohammedan is bound to make, as a religious duty, if possible at least once in his life, in the twelfth month of the Mohammedan year.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the fifth pillar of Islam is a pilgrimage to Mecca during the month of Dhu al-Hijja; at least once in a lifetime a Muslim is expected to make a religious journey to Mecca and the Kaaba
Word Usage
"In every hadj some of the pilgrims remain behind: the Mohammedan, whenever resident for any time in a town, takes a wife, and is thus often induced to settle permanently on the spot."