Ah, the "meaning of atheism". When atheism is brought to its logical conclusion, it's simply an admission that one does not know the truth about existence or if there is even a truth to be known. Yet, by claiming "I don't know the truth about existence" you're implying there is a truth to be known, but you currently don't know it yet. If you're willing to accept this truth can be known then you can confidently say there is meaning to existence(you're hopeful) but if you're willing to accept that the truth can never be known, then you're willing to say existence is meaningless. (you're hopeless)
So are you admitting that you don't know the truth about existence, but you're hopeful a truth can be known or are you admitting that you don't know the truth and that the truth may never be known, making you hopeless?
Since many atheists are willing to accept that the truth about existence can never be known, the logical conclusion from this statement is that atheism doesn't have meaning behind it. In other words, it's meaningless to be an atheist. This type of atheist is hopeless and may not even accept the truth that God exists even they were presented with evidence that showed that God does exist.
But if you're an atheist who accepts that the truth about existence can be known, then you're a hopeful atheist who would accept the truth that God exists if you were presented with convincing evidence.
So are you a hopeful atheist or a hopeless atheist?