/ Dictionary / Index D dunno: Meaning and Definition of Find definitions for: dun•no Pronunciation: (du-nō'), [key] — Pron. Spelling. Pron. Spelling. don't know: Who did it? I dunno! Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dunnite dunnock Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language