To me, being successful means...
never giving up on oneself and learning lessons from failures as much or more than accomplishments
My definition of success has changed over time.
As a young person/adult, I thought success was measured by achievements and milestones (eg. getting a degree, securing a job, owning property, getting married, and having children). Life taught me it's not about the what that made my life fulfilling, but the who and why. The relationships and personal connections (fleeting as well as enduring) that I made helped shaped the way I viewed as well as moved in the world. Learning to savor and value the experience of my journey than impatiently focused on reaching my destination.