The Meaning of Meaning

Richard Dawkins says: "My book Unweaving the Rainbow specifically attacks the idea that a materialist, mechanist, naturalistic worldview makes life seem meaningless".

The sort of cultured atheistic naturalism that Dawkins embraces may not mean that life has to be barren and depressing, but surely such naturalism cannot really get MEANING off the ground. I know that Dawkins would reply to me and say: "Life has the meaning which we create for it", but that is not what most people (including myself) MEAN by "meaning"!

By the way, Dawkins is the one on the left - but he sure looks like Harry Potter's girlfriend: