What does it mean to be "Successful"?

Alright, so you guys may or may not be aware of the fact that I'm currently in my second round of college, studying Fashion Retailing.  I'm in my last quarter of classes, and in the process of prepping for graduation.  My career adviser mentioned some "successful" students she's had in the past, and it got me thinking: what exactly is it that makes someone successful?

I don't know, maybe it's just me, but I feel like defining the word is such an inexact science--as if it's almost impossible to define.  Mirram Webster dictionary defines success as

: favorable or desired outcome; also
: the attainment of wealth, favor, or eminence

 So does that mean that I have to be rich, famous, and/or well-liked to be considered successful?  What one person might consider to be highly successful, another might think of as entirely unsuccessful.

I'm curious: what's a time when you considered yourself a huge success?  What happened?  Did this "success" last, or was it fleeting?

I know this post is sort of off-topic from what I usually post about, but I think it's relevant.  There are so many designers, artists, retailers, etc. that in one person's mind might be failing in every aspect--but maybe their goal was to fail?  Granted, I have no idea why someone's goal would be to fail, but if that were the case, would they not be successful in their goal to have failed?

Or maybe one person set out to start a small, cute little boutique, and they never wanted it to get hugely "successful" but to stay home-grown, small, the only location, and just as they would, one day it would die away.  Would that business not, then, be a success?  And what about if that very same boutique grows so huge, that the owner is forced to expand, open new locations, and it becomes so huge that it's sought out by people all over the globe?  Would that, then, also be successful?  Or would it not be successful, since the ultimate goal was never to be "successful"?

Such a strange way to look at this one stupid word, I know, but it's so hard to define such a seemingly unattainable goal, or undefinable goal as it seems.  

Can we even, then, go so far as to say each person measures their own success?  How can one person measure another person's success, without knowing everything about them, their goals, their life story, their thoughts and feelings, etc?  Is it really possible? 

Also, on a completely unrelated side-note: I signed up for Ipsy recently, and just got a notification that my April Glam Bag is on it's way!  I'm so excited to finally experience the amazing-ness for myself!  Don't worry, I will let you all know what I think :)