To exclude a person from a community or from society by not communicating with them or by refusing to acknowledge their presence; to refuse to associate with or talk to; to shun.
To ban a person from a city for five or ten years through the procedure of ostracism.
To treat as a write-off, a total loss, especially something damaged beyond economic repair.
To record (an expenditure) as an expense.
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).
To reduce the book value of (an asset) to zero.
To record a notional expense such as amortization or depreciation.
To assign a low value to (something).