A book-keeping term for the book in which details of all purchases are first entered. Under the double-entry book-keeping system, the information is afterwards transferred to the personal and general ledgers. The journal gives the name of the purchaser, a description of the goods, the date of purchase, the price charged, trade discounts, etc. Nowadays it is common for these journals to be kept mechanically; they may perhaps be no more than a copy of invoices issued, the journal being the backing sheet against which the invoices are typed or otherwise prepared.
Reference: The Penguin Business Dictionary , 3rd edt.