Noun write-off has 2 senses

• write-off(n = noun.possession) write-down - (accounting) reduction in the book value of an asset; Array
is a kind of depreciation, wear and tear
has particulars: deduction, tax deduction, tax write-off
Derived form verb write off₄

• write-off(n = noun.act) Array - the act of cancelling from an account a bad debt or a worthless asset; Array
is a kind of cancellation
Derived forms verb write off₄, verb write off₃