I've seen quite a few people who seem to think that evolution implies that the meaning or purpose of life is to reproduce. Just Google the phrase, the purpose of life is to reproduce, and you'll find plenty of examples of people proposing or debating this interpretation. Even Scientific American has a blog entry, Is the Meaning of Your Life to Make Babies?, which partially supports this view. While that article does recognize that we can have other meanings besides evolutionary ones, it still implies that this evolutionary meaning is real:
So is making babies -- and having genes survive through the generations -- the meaning of life? The answer is yes -- from an evolutionary gene's eye view. Making babies, and also other actions and social structures that result in the survival and reproduction of one's gene, such as protecting one's relatives. Differential reproduction is a process which, in conjunction with environmental interactions, has led to all life as we know it, with all its diversity and grandeur, including conscious experience itself. This is modern knowledge that is not to be taken lightly, and has impact on how we view our own meaning.
But from almost every other perspective -- individual, group, moral, environmental, or concern for life as a whole -- the answer to the question is no. Meaning from these perspectives -- from life as it is actually experienced -- is up to us. Reproduction and genetic survival may be the meaning of Life, but it is not inescapably the meaning of your life.
However, I think any interpretation that says the meaning of life is to reproduce is misguided, since it's an answer to a misguided question. Other than meanings we ascribe to ourselves, life has no meaning. Reproducing and leaving copies of our genetics isn't meaning, it's just a description of what happens. When a boulder falls off a cliff, gravity means it will fall. Does that mean the meaning of the boulder was to fall, or is it just that the act of falling is what happens due to gravity?
Or consider a river. Do rivers have a meaning? Do they have a purpose? Sure, they return water to oceans, but that's simply what happens due to water flowing downhill and collecting in the lowest regions. There's no meaning to it. It's just the result of physics.
That's how it is with evolution. Organisms that are more 'fit' in whatever sense that means for their environment have more offspring, which means their genes become more prevalent. But that's no more a meaning or purpose than a river flowing downhill. It's just a description of what happens.
Meaning and purpose only make sense in relation to a conscious entity. Genes are not conscious entities. Nature is not a conscious entity. Evolution is not a conscious entity. So it makes no sense to describe the results of evolutionary processes as having any meaning or purpose. They're simply results.
Image Source: I made it myself. And if you don't get the reference - 42.