/ Dictionary / Index N NTIA: Meaning and Definition of Find definitions for: NTIA Pronunciation: [key] National Telecommunications and Information Administration. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. n-3 fatty acid NTSB Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language