/ Dictionary / Index M M.N.S.: Meaning and Definition of Find definitions for: M.N.S. Pronunciation: [key] Master of Nutritional Science. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mns (Thesaurus) Mngr. M.Nurs. Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language