Grand master Meaning, Definition & Usage

. (a) The head of one of the military orders of knighthood, as the Templars, Hospitallers, etc. (b) The head of the order of Freemasons or of Good Templars, etc. (c) The highest rank for a chess player, awarded by a national or international organization of chess players as a result of winning games of chess against other ranked players in chess tournaments officially sanctioned by that chess organization, such as FIDE. By extension, (Figuratively) a person with the highest level of expertise in some field. Also "grandmaster".