The vocabulary has become distorted.
Inflation is the increase of the money supply with the result being higher prices.
Deflation is the reduction of the money supply with the results being lower prices.
Current dictionaries have changed the definition of inflation to mean rising prices and deflation to mean falling prices. This is because in general they were both so interchangeable that they were just used this way.
But using the original definitions, prices can fall without deflation. Increases in industrial efficiency, for example, lead to falling prices. This is a great thing, as we can then all buy more stuff with the same amount of money. Our standard of living has just increased in this example.
The idea of falling prices being a bad thing is brain washing of the 1st degree. I don't know about you but I would be happy to see my milk get cheaper rather than more expensive. Falling prices are a good thing, rising prices are a bad thing. It's common sense.
In regards to current monetary policy, the problem is that we have central planners trying to dictate the economy. This never works. Why not let the free market set the interest rate? Why not keep the government out of the private market?