/ Dictionary / Index J Jefferson: Meaning and Definition of Find definitions for: Jef•fer•son Pronunciation: ( jef'ur-sun), [key] — n. 1829–1905, U.S. actor. 1743–1826, U.S. statesman, diplomat, architect, and author: third president of the U.S. 1801–09. a male given name. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: jefferson (Thesaurus) Jeffers Jefferson City 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