A chess player regarded as having the highest level of ability.(noun)
A person of the highest competence or achievement in a field: a grand master of foreign diplomacy. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "grand master" in a sentence
"Both the court and the public object far less to the intimacy that exists between Count Augustus Eulenburg and his imperial friend, for Augustus, who is the grand master of the imperial household and the chief executive dignitary of the court, has been the closest associate of William since the latter's earliest boyhood."
"He is followed by the archdukes, conspicuous among them the gigantic Archduke Eugene, grand master of the Teutonic Order, in the semi-ecclesiastical habits of his rank, while the procession is brought to a close by escorts of the superbly arrayed Archer and Hungarian Body Guards."
"It is called the “Marien Kirche,” and was begun in 1343 by the grand master of the Teutonic Knights."