/ Dictionary / Index N numskull: Meaning and Definition of Find definitions for: num•skull Pronunciation: (num'skul"), [key] — n. a dull-witted or stupid person; dolt. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: numskull (Thesaurus) nummulitic limestone nun Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language