I'd go so far as to say- entrepreneurs are just people who are trying to solve problems. I get annoyed when I hear people ask things like "How do I become an entrepreneur?" in an aspirational way, as though it's some sort of cool club where all the cool kids are hanging out.
An entrepreneur is just a person who's so bothered by a particular problem, who's so dissatisfied with the status quo that she decided to get her hands dirty and make a dent in it.