1. To cancel a bad debt or obsolete asset from the accounts. 2. To consider (a transaction, etc) as a loss or set off (a loss) against revenues. 3. To depreciate (an asset) by periodic charges. 4. To charge (a specified amount) against gross profits as depreciation of an asset. 5. To cause or acknowledge the complete loss of. 6. To damage (something, esp a car) beyond repair.