›ACCOUNTING, FINANCEto accept that an amount of money has been lost, for example, from a bad investment or a debt that will never be paid, and show it as a loss in a company's accounts: Banks accept that some of their bad debts will eventually have to be written off.
›UK INSURANCEto damage a vehicle so badly that it cannot be repaired, or it would cost too much to repair: The car was completely written off. → See alsowrite-off