/ Dictionary / Index N NCPAC: Meaning and Definition of Find definitions for: NCPAC Pronunciation: [key] National Conservative Political Action Committee. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. N.C.O. NC-17 Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language