/ Dictionary / Index R rackboard: Meaning and Definition of Find definitions for: rack•board Pronunciation: (rak'bôrd", -bōrd"), [key] — n. a board with holes into which organ pipes are fitted. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rack and pinion rack car Related Content Daily Word Quiz: modify Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language