inflation rate The increase in prices from one year to the next, expressed as a percentage. Related Related Articles: Glossary: consumer price index (CPI)What We Can Learn From Used Car PricesInflation Clues From Sticky PricesThe People With the Most and Least InflationWhy Zimbabwe Laundered Money Ann Mills Share This Previous Articlegross national product (GNP) Next ArticleM2 December 17, 2020