/pok"it book'/ , n.
1. a woman's purse or handbag.
2. a person's financial resources or means: The price was out of reach of his pocketbook.
3. Also, pocket book . a book, usually paperback, that is small enough to carry in one's coat pocket.
4. Brit.
a. a notebook for carrying in one's pocket.
b. a wallet or billfold.
[ 1610-20; POCKET + BOOK ]