/ Dictionary / Index M malocclusion: Meaning and Definition of Find definitions for: mal•oc•clu•sion Pronunciation: (mal"u-kl'zhun), [key] — n. Dentistry. faulty occlusion; irregular contact of opposing teeth in the upper and lower jaws. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: malocclusion (Thesaurus) malnutrition malodor Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language