In Freemasonry the Grand Master is the supreme ruler of the Craft within a given jurisdiction. He presides over his Grand Lodge and has certain rights in each private lodge (constituent lodge) within his jurisdiction. Just as the Worshipful Master of each private lodge annually appoints lodge officers to assist him, so the Grand Master of each Grand Lodge annually appoints grand lodge officers to assist him in his work. Wikipedia
The definitive Wikipedia entry for Grand Master. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Grand_Master_%28Masonic%29
