noun the essence; the best part.
2. marrow ·noun one of a pair; a match; a companion; an intimate associate.
3. marrow ·vt to fill with, or as with, marrow of fat; to glut.
4. marrow ·noun the tissue which fills the cavities of most bones; the medulla. in the larger cavities it is commonly very fatty, but in the smaller cavities it is much less fatty, and red or reddish in color.