/ Dictionary / Index B bay rum: Meaning and Definition of Find definitions for: bay' rum' Pronunciation: [key] a fragrant liquid used chiefly as an aftershaving lotion, prepared by distilling the leaves of the tropical American bay, Pimenta racemosa, with rum or by mixing oil from the leaves with alcohol, water, and other oils. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Bayreuth bay rum tree Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language