/ Dictionary / Index B butterpaste: Meaning and Definition of Find definitions for: but•ter•paste Pronunciation: (but'ur-pāst"), [key] — n. a mixture of flour and butter kneaded together, used as a thickening for sauces. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. butter of arsenic butter sauce Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language