A book where journal entries are made documenting transactions or receipts and disbursements of money or property. A book of accounts in which a trader enters the names of all persons with whom he has dealings; there being two parallel columns in each account, one for the entries to the debit of the person charged, the other for his credits. Into this book are posted the items from the day book or journal. Ledger book. In ecclesiastical law. The name of a book kept in the prerogative courts in England. It is considered as a roll of the court, but, it seems, it cannot be read in evidence.