It's all about time, erosion, and the change of words. Being a "conservative" person meant the first definition, BladeRunner notwithstanding. In time, most people that had a conservative temperament favored things such as free enterprise over socialism, which was a more radical transformation of society than keeping a basic market-based system. Given that, then conservative-minded people started teaming with those who favored free enterprise and we have today's lexical conundrum, which is where a "conservative" actually opts for the dynamism of the free market rather than the old world socialism of the hunter-gatherers and argiculturalists, which predate free-market theory.
It all depends where you're starting and what your frame of reference is to. If by "conservative" one means that the beginning point is the Enlightenment free-marketers, then yes, a conservative hearkens back to this as his or her reference point. This is what we mean by "conservative" today.
if it hearkens back something else, then the term "conservative" as applied to politics makes no sense in its modern context.
It's just like the political designation "liberal" doesn't even mean what "classical liberal" used to mean. Even within a political context, the word changed.