/ Dictionary / Index N nutter: Meaning and Definition of Find definitions for: nut•ter Pronunciation: (nut'ur), [key] — n. a person who gathers nuts. an insane person. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nutter (Thesaurus) nutsy nutting Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language