/ Dictionary / Index B bass drum: Meaning and Definition of Find definitions for: bass' drum' Pronunciation: (bās), [key] the largest and lowest toned of drums, having a cylindrical body and two membrane heads. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bass clef Bassein 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