/ Dictionary / Index N NUL: Meaning and Definition of Find definitions for: NUL Pronunciation: [key] National Urban League. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Nukualofa null Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language