write off

verb writes off · writing off · wrote off · written off

1. transitive To reduce the book value of (an asset) to zero.
2. transitive To record (an expenditure) as an expense.
3. transitive To remove a portion of a debt or an amount of an account owed, counting it as a loss (as a gesture of goodwill for example).
4. To record a notional expense such as amortization or depreciation.
5. transitive To treat as a write-off, a total loss, especially something damaged beyond economic repair. The '800' received substantial collision damage, while the High Speed Train power car was written off.
6. figuratively, transitive To assign a low value to (somebody or something). When Katya was injured, he wrote off the team's chances in the finals.