One definition of success is "having succeeded or being marked by a favorable outcome."
Seems like a very simple statement for a such a complex subject. I think of success differently, "the understanding that your purpose is to be successful continuously, not just momentarily."
The meaning of success is changing. It's no longer one thing that defines being successful. It's a continuous trend of doing things successfully. Think about some of the athletes. In the spotlight, in the press, in every other conversation that people have. In a moment being unsuccessful in character, they lose everything. Are they still successful? Guess, it depends on who you talk to.
Success isn't a get rich quick scheme or a moment of doing something good that gets attention. It's a way of life and it's a part of a person's character. Some of the most successful people are good at being steady at balancing the most complicated parts of being a human being. Not all can do this. Few will do this.