1. An elimination of an item from the books of account
2. A reduction in book value of an item (as by way of depreciation)
3. A tax deduction of an amount of depreciation, expense, or loss
4. chiefly British; something (as a damaged vehicle) or someone regarded or conceded as a loss
5. Reduction in the book value of an asset; SYN. write-down.
6. The act of cancelling a debt as uncollectible.

1. To cancel (a debt).
2. To concede the loss or worthlessness of something or somebody.
3. To reduce the estimated value of something
4. To write something fluently, and without hesitation.