Dictionary
grand' mas'ter
1. Chess.See
International Grand Master.
2. a person at the highest level of ability or achievement in any field.
Also,grand'mas'ter.Grand' Mas'ter
—
n.
the head of a military order of knighthood, a lodge, fraternal order, or the like.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.