/ Dictionary / Index B bass horn: Meaning and Definition of Find definitions for: bass' horn' Pronunciation: (bās), [key] tuba. an obsolete wind instrument related to the tuba but resembling a bassoon in shape. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bass fiddle bassinet Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language