But you asked a different question? It would be better to point to an older dictionary definition of inflation to prove your point then to the Austrian definition. It is not as if the Austrian School was mainstream before.

Austrian definition of inflation

ChatGPT

According to Austrian economists, inflation is not merely the rise in the general price level of goods and services but is fundamentally linked to the increase in the supply of money and credit beyond the actual supply of goods and services in the economy.

Gemini

Austrian economists define inflation as a general increase in the money supply that is not offset by a corresponding increase in the demand for money. This leads to a decrease in the purchasing power of money, which is manifested in rising prices.

Grok

The Austrian School of Economics defines inflation primarily as an increase in the money supply that is not offset by a corresponding increase in the demand for money or in the production of goods and services.