/ Dictionary / Index B butter bean: Meaning and Definition of Find definitions for: but'ter bean" Pronunciation: [key] a variety of small-seeded lima bean, Phaseolus lunatus, grown in the southern U.S. any type of lima bean. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: butterbean (Thesaurus) butterball butterbread Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language