depreciation A money value that represents the extent to which a capital good has become less efficient because of age; the extent to which a currency has become less valuable when compared to other currencies. Related Related Articles: Glossary: capital consumption allowanceGlossary: net domestic product (NDP)Glossary: net national product (NNP)Six Facts: The Impact of Rising World Food Prices Ann Mills Share This Previous Articlecountry of origin Next Articleeconomic scarcity December 17, 2020