Ledger is a summary of transactions that relate to a certain account. For example, our bank ledger will summaries all the transactions that involved our bank account; our loan ledger will summarise all the transactions that involved our loan account and so on

By this same analogy, a ledger could be considered a folder that contains all of the notebooks or accounts in the chart of accounts. For instance, the ledger folder could have a cash notebook, accounts receivable notebook, and notes receivable notebooks in it. In a sense, a ledger is a record or summary of the account records.