- (accounting) To reduce an asset's book value to zero
- (accounting) To record an expenditure as an expense.
- (accounting) To remove a portion of a debt or an amount of an account owed to you counting it as a loss (as a gesture of goodwill for example)
- (accounting) To record a notional expense such as amortization or depreciation.
- Figuratively, to assign a low value to something.
- When Katya was injured, he wrote off the team's chances in the finals.
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