/ Dictionary / Index N NRPB: Meaning and Definition of Find definitions for: NRPB Pronunciation: [key] National Resources Planning Board. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. NROTC NRTA Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language