From Longman Business Dictionaryaccelerated cost recovery systemacˌcelerated ˈcost reˌcovery ˌsystem abbreviation ACRS [uncountable]ACCOUNTING a way of calculating the value of assets used in the US, in which the value of an asset is taken to decrease quite quickly, over a period of time fixed by the tax authorities, rather than over the period of time in which it actually remains useful to a company → system