/ Dictionary / Index G grand master: Meaning and Definition of Find definitions for: grand' mas'ter Pronunciation: [key] See a person at the highest level of ability or achievement in any field. Grand' Mas'ter Pronunciation: [key] 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. See also: grandmaster (Thesaurus) Grand Marnier Grand'Mère Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language