/ Dictionary / Index U U Nu: Meaning and Definition of Find definitions for: U Nu Pronunciation: (' n'). [key] See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. untwisted unused Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language