Source : Webster's Revised Unabridged Dictionary (1913)

Pocketbook \Pock"et*book`\, n.
   A small book or case for carrying papers, money, etc., in the
   pocket; also, a notebook for the pocket.

Source : WordNet®

pocketbook
     n 1: your personal financial means; "that car is too expensive
          for my pocketbook"
     2: a pocket-size case for holding papers and paper money [syn:
        {wallet}, {billfold}, {notecase}]
     3: pocket-sized paperback book [syn: {pocket book}, {pocket
        edition}]
     4: a bag used for carrying money and small personal items or
        accessories (especially by women); "she reached into her
        bag and found a comb" [syn: {bag}, {handbag}, {purse}]