Breadcrumb Home > Dictionary > Index M myelitis: Meaning and Definition of Find definitions for: my•e•li•tis Pronunciation: (mī"u-lī'tis), [key] — n. Pathol. inflammation of the substance of the spinal cord. inflammation of the bone marrow. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: myelitis (Thesaurus) myelin sheath myelo- ✖ Related Content Daily Word Quiz: restive Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language