/ Dictionary / Index B billfold: Meaning and Definition of Find definitions for: bill•fold Pronunciation: (bil'fōld"), [key] — n. a thin, flat, folding case, often of leather, for carrying paper money in the pocket and with fewer compartments than a wallet. wallet (def. 1). Also called, Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: billfold (Thesaurus) billfish billfolder Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language