OK, I know that generalizations usually don’t work. But I will generalize here and pose that the definition of a Republican is a person who wants more government in our private lives, and a Democrat is one who wants more government in the marketplace.
On the other hand, libertarians mostly want less government in both places.
In that regard, numbers of times after I became a libertarian in 2003 I heard many people from all different political persuasions tell me that they too in many ways believe they also are libertarians. And you know something? They are probably correct.
What is the real definition of a libertarian? Mostly it is defined as a person who believes in maximizing individual rights and minimizing the role of the state.