/ Dictionary / Index R riding master: Meaning and Definition of Find definitions for: rid'ing mas"ter Pronunciation: [key] a person who teaches equitation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. riding light riding sail Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language