yes, that is what deflation is
This is a perversion of the economic definition of inflation and deflation.
Inflation is the rate of change of prices.
Historically speaking, the "printing too much paper money" definition of "inflation", which is more or less what you're saying is "a perversion of the economic definition of inflation", preceded the "general increase in prices" definition you're talking about: https://en.wikipedia.org/wiki/Inflation#Classical_economics