/ Dictionary / Index M Masonite: Meaning and Definition of Find definitions for: Ma•son•ite Pronunciation: (mā'su-nīt"), [key] — Trademark. Trademark. a brand of hardboard. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: masonite (Thesaurus) Masonic Mason jar 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