/ Dictionary / Index V valve trombone: Meaning and Definition of Find definitions for: valve' trombone" Pronunciation: [key] a trombone equipped with three or four valves in place of a slide. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. valve stem valvula Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language