'billfold' definitions:

Definition of 'billfold'

From: WordNet
noun
A pocket-size case for holding papers and paper money [syn: wallet, billfold, notecase, pocketbook]

Definition of 'billfold'

From: GCIDE
  • billfold \bill"fold`\ (b[i^]l" f[=o]ld`), A small, thin, flat container, usually made of leather or imitation leather, having a pocket of a size just large enough to hold paper currency and folded over once to fit in the pocket of one's clothing; it is a type of wallet, but having fewer compartments than the typical wallet. [PJC]