Breadcrumb Home > Dictionary > Index N nitwit: Meaning and Definition of Find definitions for: nit•wit Pronunciation: (nit'wit"), [key] — n. a slow-witted, stupid, or foolish person. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nitwit (Thesaurus) nitty-gritty Niue ✖ Related Content Daily Word Quiz: tendentious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language