/ Dictionary / Index N ninnyhammer: Meaning and Definition of Find definitions for: nin•ny•ham•mer Pronunciation: (nin'ē-ham"ur), [key] — n. a fool or simpleton; ninny. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ninny niño* Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language