Different people, different definition.
Same person, different circumstances, different definitions.
What is success to you right now?
Work for a big label company? Create something that is highly valued/appreciated? Make a lot of money? Feel happy about what you are doing? Buy that BMW that stole your heart? Be indispensable at what you do? Be socially appreciated? Being happy?
AND, are you achieving success regularly? If you haven’t yet, is what you are doing today bringing it any closer?
It helps to revisit every once in a while.
If you do, you know what you have to do today, to reach your definition of success.
If you don’t, you keep envying others for what you don’t even want (the social perception of success).