Ah, I spot a familiar pattern here: the layman definition of a term, which has all of the political power, has diverged from the academic definition, which is completely powerless.
The layman definition of inflation is "everything got more expensive". The academic definition seems to be "things got more expensive, but only if there isn't a shortage of that thing or too much demand(?)".
I think the layman definition is more logical, because shortages and demand are solvable if there's enough monetary inventive, which is ultimately accounted for in, you guessed it, the final price.