Disinflation is a decrease in the rate of inflation – a slowdown in the rate of increase of the general price level of goods and services in a nation's gross domestic product over time. It is the opposite of reflation.
If the inflation rate is not very high to start with, disinflation can lead to deflation – decreases in the general price level of goods and services. For example if the annual inflation rate one month is 5% and it is 4% the following month, prices disinflated by 1% but are still increasing at a 4% annual rate. If the current rate is 1% and it is the -2% the following month, prices disinflated by 3% and are decreasing at a 2% annual rate.
Meltzer, A.H. (2006), "From Inflation to More Inflation, Disinflation, and Low Inflation", American Economic Review, 96 (2): 185–188, doi:10.1257/000282806777211900, S2CID3789479
Calvo, G.A.; Celasun, O.Y.A.; Kumhof, M. (2003), "Inflation Inertia and Credible Disinflation-The Open Economy Case", NBER Working Paper No. 9557, doi:10.3386/w9557