/ Dictionary / Index M millerite: Meaning and Definition of Find definitions for: mill•er•ite Pronunciation: (mil'u-rīt"), [key] — n. a mineral, nickel sulfide, NiS, occurring in slender, bronze-colored crystals: a minor ore of nickel. Mill•er•ite Pronunciation: (mil'u-rīt"), [key] — n. a follower of William Miller, a U.S. preacher who taught that the Second Advent of Christ and the beginning of the millennium were to occur in 1843. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: millerite (Thesaurus) Miller index miller's-thumb Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language