/ Dictionary / Index J Jeffries: Meaning and Definition of Find definitions for: Jef•fries Pronunciation: ( jef'rēz), [key] 1875–1953, U.S. boxer: world heavyweight champion 1899–1905. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Jeffreys Jeh Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language