What is Accrual?

Legal Definition
Accrual (accumulation) of something is, in finance, the adding together of interest or different investments over a period of time. It holds specific meanings in accounting, where it can refer to accounts on a balance sheet that represent liabilities and non-cash-based assets used in accrual-based accounting. These types of accounts include, among others, accounts payable, accounts receivable, goodwill, deferred tax liability and future interest expense.
-- Wikipedia
Legal Definition
A short term liability during an accounting period that is not recorded for payment.They are estimated by experience. It is not taken on a report to fit the accural basis accounting rules.