Yes, but you can't arbitrarily redefine words. People need to understand each other, and that's why there are words with agreed meaning.
And the agreed meaning of fiat currency is a currency which value is regulated by a government.
That definition would be wrong. The value of a currency is determined by what other people are willing to trade for it. The government may try to regulate the value by pegging a currency to another government fiat currency, forbidding non-government exchanges, or fixing prices on goods, but inevitable black markets and black market currency exchanges will give you the true value.
Because money printing doesn't affect the value at all.
Als, you seem to disregad my last comment, about the multiple definitions of fiat money online.