/ Dictionary / Index S supersonics: Meaning and Definition of Find definitions for: su•per•son•ics Pronunciation: (s"pur-son'iks), [key] — n. (used with a sing. v.) the branch of science that deals with supersonic phenomena. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. supersonic supersonic transport Related Content Daily Word Quiz: feral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language