/ Dictionary / Index M marrow: Meaning and Definition of Find definitions for: mar•row Pronunciation: (mar'ō), [key] — n. a soft, fatty, vascular tissue in the interior cavities of bones that is a major site of blood cell production. the inmost or essential part: to pierce to the marrow of a problem. strength or vitality: Fear took the marrow out of him. rich and nutritious food. See mar•row Pronunciation: (mar'ōScot.mar'&schwa), [key] — n. Scot. and North Eng. a partner; fellow worker. a spouse; helpmate. a companion; close friend. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: marrow (Thesaurus) marrons glacés marrowbone Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language