/ Dictionary / Index T transonic barrier: Meaning and Definition of Find definitions for: transon'ic bar'rier. Pronunciation: [key] See sound barrier. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. transonic transp. Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language