I get that these terms get tossed around without people knowing what they mean, and I'm not against language evolving. But liberalism was never really intended to describe wherever you are on a progressive-conservative spectrum.
Pulling from Wikipedia, but it's a similar definition in most texts.
Liberalism is a political and moral philosophy based on the rights of the individual, liberty, consent of the governed, political equality, right to private property, and equality before the law.
Classical liberals just tended to look progressive compared to people who weren't liberals, because, well, read the definition. The countervailing force to liberalism is authoritarianism. It's more of a government legitimacy and structure philosophy.