/ Dictionary / Index N NRTA: Meaning and Definition of Find definitions for: NRTA Pronunciation: [key] National Retired Teachers Association. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. NRPB NS 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