/ Dictionary / Index M marl: Meaning and Definition of Find definitions for: marl Pronunciation: (märl), [key] — n. a friable earthy deposit consisting of clay and calcium carbonate, used esp. as a fertilizer for soils deficient in lime. earth. —v.t. to fertilize with marl. marl Pronunciation: (märl), [key] — v.t. Naut. to wind (a rope) with marline, every turn being secured by a hitch. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: marl (Thesaurus) markup Marlboro 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