/ Dictionary / Index N NACA: Meaning and Definition of Find definitions for: NACA Pronunciation: [key] National Advisory Committee for Aeronautics. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Nabuchodonosor nacelle Related Content Daily Word Quiz: modify Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language