Failure

So I've been wondering... What makes a person a failure? Is it not doing well in school... losing a job... not getting a job... not having a future plane? I've pondered this thought many times. What / who are failures? People constantly talk about being or not wanting to be failures, but what actually makes a person a failure? People say when you try your hardest and you don't succeed that's life... but isn't that failure. Where is the line? When is trying your hardest not enough? I feel like you can try all you want, but for some, they will always be failures. It isn't fair... but some are just unlucky. I wish that wasn't true, but I think some are just meant to lack success and be unlucky.