How Do You Define Success

What does it mean to be successful?  How do you define it?  Who do you know who is truly successful?  Stewart Emory, author of ‘Success Built to Last’ deeply researched successful people and came to this conclusion:  “Successful people define it differently. They define success as pursuing something that matters to you and inevitably contributes to the world at large.”  So what are you pursuing that matters deeply to you and could ultimately contribute to the world at large?