1. A small book for carrying papers in the pocket.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• poketbook,
• pocktebook,
• oocket book,
• locket book,
• -ocket book,
• 0ocket book,
• pkcket book,
• plcket book,
• ppcket book,
• p0cket book,
• p9cket book,
• poxket book,
• povket book,
• pofket book,
• podket book,
• pocjet book,
• pocmet book,
• poclet book,
• pocoet book,
• pociet book

The adjective form of "pocket book" is "pocket-sized".

The plural form of "pocket book" is "pocket books".

The singular form of the word "pocket book" is "pocketbook"