Yeah you're the one being pedantic here. Liberalism has exactly two definitions that get used 99% of the time. Someone might say liberal to mean "socially liberal," which means open-mindedness in regards to progressive movements such as feminism, promotion of gay rights, acceptance of trans people, and all that stuff. This is usually the only definition used in the USA.

Or they mean liberalism as the broad ideological foundation of capitalism, with a belief in the promotion of free enterprise, distribution, public-private separation, and the primacy of individual rights. This definition is almost never used in the USA except by socialists, but outside of the USA this is understood as the primary definition of the term whereas "socially liberal" is regarded as a secondary definition.

And it's very easy to determine which one a person is talking about if you look at the context clues. The only other context I can think of where liberal is used is the academic term "liberal arts," but that refers to scholarly topics that would have been taught to people who weren't slaves.