/ Dictionary / Index M marchioness: Meaning and Definition of Find definitions for: mar•chion•ess Pronunciation: (mär'shu-nis, mär"shu-nes'), [key] — n. Brit. marquise (defs. 1, 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: marchioness (Thesaurus) marching orders marchland Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language