A dollar adjusted for inflation. If an asset such as land was purchased for $10,000 many years ago when the consumer price index (CPI) was 100 and today the CPI is 400, today constant-dollar amount would be $40,000. However, generally accepted accounting principles (specifically the monetary unit assumption) assumes that the CPI is unchanging. Therefore the land will be reported at its original, unadjusted amount of $10,000.