/ Dictionary / Index S sousaphone: Meaning and Definition of Find definitions for: sou•sa•phone Pronunciation: (s'zu-fōn", -su-), [key] — n. a form of bass tuba, similar to the helicon, used in brass bands. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sousaphone (Thesaurus) Sousa sous-chef Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language