Life has many meanings, to define one is to limit. We make our own meanings individually, as you can see from the countless amounts of different answers in this thread made by different people. The question is, what are YOU meaning to do with life?
iRaw-x, many people consider it a goal in their life to leave a mark in what they do to be remembered by. Like musicians make music hopeful that their songs will live on as long as themselves. It doesnt have to be this though. It can be something like being remembered for the type of person you were as well as your achievements.
We have been given a life, no matter what source we think it has come from or how it has happened, and it is only natural to question this. But while we do, the life we have is ticking by, so might as well make the most of it and get out there and do stuff! It's good to have some sort of plan that you want to do. Many magnetize to those with goals. People find this quite attractive, you know... ;)