/ Dictionary / Index J jamesonite: Meaning and Definition of Find definitions for: jame•son•ite Pronunciation: ( jām'su-nīt"), [key] — n. a metallic, dark-gray mineral, lead and iron antimony sulfide: formerly mined for lead. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Jameson James Range Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language