/ Dictionary / Index B buttonbush: Meaning and Definition of Find definitions for: but•ton•bush Pronunciation: (but'n-boosh"), [key] — n. a North American shrub, Cephalanthus occidentalis, of the madder family, having globular flower heads. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. button button-down Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language