From Longman Business Dictionarynet book valueˌnet ˌbook ˈvalue abbreviation NBV [countable, uncountable] ACCOUNTINGFINANCEthe value of an asset or group of assets in a company’s financial records after DEPRECIATION (=amounts to allow for their estimated loss of value as they get older, less productive etc) or REVALUATIONs (=amounts to show estimated increases in the value of property, buildings etc). This may be more or less than what they could actually be sold forThe net book value of our domestic oil and gas properties was $112.3 million as of last Sept. 30.Is property and plant at net book value or are they included at current valuation or depreciated replacement cost? → value