n. A soft tissue found in the interior of bones, both in the cylindrical hollow of the long bones and in the hollows of cancellated bony structures; the medulla or medullary matter of bone.n. The pith of plants.n. The pulp of fruits.n. Figuratively, the inner substance; the essence; the essential strength; the inner meaning, purpose, etc.; the pith.n. The alligator-pear. See avocado.To fill with marrow or with fat.n. A companion or mate; an associate; an intimate friend; a fellow; hence, one of a pair of either persons or things; a match: as, your knife's the very marrow o' mine.To associate with; hence, to match; fit.Soft; tender.